./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --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 103efe8931e099ca6c2446ad32c4c46818a6d213fc850bc42032bda38d601e6f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:25:10,389 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:25:10,479 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:25:10,485 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:25:10,486 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:25:10,511 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:25:10,512 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:25:10,513 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:25:10,514 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:25:10,515 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:25:10,515 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:25:10,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:25:10,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:25:10,517 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:25:10,518 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:25:10,519 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:25:10,519 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:25:10,520 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:25:10,521 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:25:10,521 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:25:10,522 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:25:10,522 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:25:10,523 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:25:10,523 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:25:10,524 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:25:10,524 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:25:10,525 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:25:10,525 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:25:10,526 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:25:10,526 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:25:10,527 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:25:10,527 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:25:10,528 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:25:10,528 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:25:10,529 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:25:10,529 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:25:10,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:25:10,529 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:25:10,530 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:25:10,530 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:25:10,530 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:25:10,531 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:25:10,531 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 103efe8931e099ca6c2446ad32c4c46818a6d213fc850bc42032bda38d601e6f [2023-11-23 22:25:10,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:25:10,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:25:10,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:25:10,869 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:25:10,869 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:25:10,871 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2023-11-23 22:25:14,088 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:25:14,358 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:25:14,359 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2023-11-23 22:25:14,371 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/data/3b96f298d/f1d0ff034a3e4aa0bff5482aa6c6398c/FLAGb33b80373 [2023-11-23 22:25:14,391 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/data/3b96f298d/f1d0ff034a3e4aa0bff5482aa6c6398c [2023-11-23 22:25:14,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:25:14,400 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:25:14,404 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:25:14,404 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:25:14,409 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:25:14,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65cc9adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14, skipping insertion in model container [2023-11-23 22:25:14,414 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,449 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:25:14,692 WARN L240 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_a77a8cf0-40e7-42fe-818a-05d2fd633885/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3066,3079] [2023-11-23 22:25:14,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:25:14,719 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:25:14,745 WARN L240 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_a77a8cf0-40e7-42fe-818a-05d2fd633885/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3066,3079] [2023-11-23 22:25:14,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:25:14,754 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:25:14,755 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:25:14,763 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:25:14,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14 WrapperNode [2023-11-23 22:25:14,764 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:25:14,766 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:25:14,766 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:25:14,766 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:25:14,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,783 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,815 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 150 [2023-11-23 22:25:14,816 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:25:14,816 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:25:14,817 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:25:14,817 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:25:14,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,834 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,860 INFO L189 HeapSplitter]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2] [2023-11-23 22:25:14,860 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,861 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,878 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,882 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,884 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,886 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:25:14,894 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:25:14,894 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:25:14,894 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:25:14,895 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (1/1) ... [2023-11-23 22:25:14,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:25:14,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:25:14,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:25:14,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:25:14,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:25:14,971 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:25:14,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:25:14,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:25:14,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:25:14,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 22:25:14,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 22:25:14,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:25:14,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:25:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:25:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:25:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:25:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:25:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:25:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:25:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:25:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:25:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:25:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:25:14,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:25:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:25:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:25:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:25:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:25:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:25:14,977 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:25:15,122 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:25:15,125 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:25:15,471 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:25:15,740 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:25:15,740 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 22:25:15,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:25:15 BoogieIcfgContainer [2023-11-23 22:25:15,741 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:25:15,743 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:25:15,743 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:25:15,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:25:15,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:25:14" (1/3) ... [2023-11-23 22:25:15,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df9aab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:25:15, skipping insertion in model container [2023-11-23 22:25:15,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:14" (2/3) ... [2023-11-23 22:25:15,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df9aab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:25:15, skipping insertion in model container [2023-11-23 22:25:15,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:25:15" (3/3) ... [2023-11-23 22:25:15,751 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-11-23 22:25:15,761 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:25:15,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:25:15,773 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:25:15,774 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:25:15,838 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 22:25:15,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 39 transitions, 99 flow [2023-11-23 22:25:15,914 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-11-23 22:25:15,915 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:25:15,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 4/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 70 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2023-11-23 22:25:15,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 39 transitions, 99 flow [2023-11-23 22:25:15,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 35 transitions, 88 flow [2023-11-23 22:25:15,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:25:15,943 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=LoopHeads, 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;@236c89a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:25:15,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 22:25:15,961 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:25:15,961 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2023-11-23 22:25:15,961 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:25:15,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:25:15,962 INFO L208 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] [2023-11-23 22:25:15,963 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)] === [2023-11-23 22:25:15,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash -290808675, now seen corresponding path program 1 times [2023-11-23 22:25:15,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:15,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78253464] [2023-11-23 22:25:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:15,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:25:16,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:16,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78253464] [2023-11-23 22:25:16,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78253464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:16,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:16,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:25:16,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884419904] [2023-11-23 22:25:16,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:16,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:25:16,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:16,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:25:16,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:25:16,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-23 22:25:16,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:16,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:25:16,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-23 22:25:16,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:25:17,537 INFO L124 PetriNetUnfolderBase]: 2888/4207 cut-off events. [2023-11-23 22:25:17,537 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2023-11-23 22:25:17,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8535 conditions, 4207 events. 2888/4207 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21639 event pairs, 405 based on Foata normal form. 0/3340 useless extension candidates. Maximal degree in co-relation 7857. Up to 1379 conditions per place. [2023-11-23 22:25:17,567 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 75 selfloop transitions, 5 changer transitions 42/129 dead transitions. [2023-11-23 22:25:17,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 129 transitions, 550 flow [2023-11-23 22:25:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:25:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:25:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2023-11-23 22:25:17,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7106227106227107 [2023-11-23 22:25:17,582 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 194 transitions. [2023-11-23 22:25:17,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 194 transitions. [2023-11-23 22:25:17,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:25:17,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 194 transitions. [2023-11-23 22:25:17,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 27.714285714285715) internal successors, (194), 7 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:17,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 39.0) internal successors, (312), 8 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:17,595 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 39.0) internal successors, (312), 8 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:17,596 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 88 flow. Second operand 7 states and 194 transitions. [2023-11-23 22:25:17,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 129 transitions, 550 flow [2023-11-23 22:25:17,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 129 transitions, 518 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-23 22:25:17,611 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 127 flow [2023-11-23 22:25:17,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=127, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-11-23 22:25:17,616 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2023-11-23 22:25:17,617 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 127 flow [2023-11-23 22:25:17,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:17,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:25:17,617 INFO L208 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] [2023-11-23 22:25:17,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:25:17,618 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)] === [2023-11-23 22:25:17,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:17,619 INFO L85 PathProgramCache]: Analyzing trace with hash 520836159, now seen corresponding path program 2 times [2023-11-23 22:25:17,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:17,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90292079] [2023-11-23 22:25:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:17,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:25:17,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:17,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90292079] [2023-11-23 22:25:17,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90292079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:17,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:17,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:25:17,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303837330] [2023-11-23 22:25:17,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:17,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:25:17,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:17,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:25:17,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:25:17,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-23 22:25:17,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:17,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:25:17,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-23 22:25:17,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:25:18,265 INFO L124 PetriNetUnfolderBase]: 2418/3505 cut-off events. [2023-11-23 22:25:18,265 INFO L125 PetriNetUnfolderBase]: For 2087/2090 co-relation queries the response was YES. [2023-11-23 22:25:18,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8677 conditions, 3505 events. 2418/3505 cut-off events. For 2087/2090 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16601 event pairs, 148 based on Foata normal form. 0/3066 useless extension candidates. Maximal degree in co-relation 6163. Up to 1594 conditions per place. [2023-11-23 22:25:18,293 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 65 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2023-11-23 22:25:18,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 404 flow [2023-11-23 22:25:18,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:25:18,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:25:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2023-11-23 22:25:18,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6102564102564103 [2023-11-23 22:25:18,296 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 119 transitions. [2023-11-23 22:25:18,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 119 transitions. [2023-11-23 22:25:18,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:25:18,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 119 transitions. [2023-11-23 22:25:18,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:18,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:18,299 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:18,299 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 127 flow. Second operand 5 states and 119 transitions. [2023-11-23 22:25:18,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 404 flow [2023-11-23 22:25:18,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 80 transitions, 392 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-23 22:25:18,312 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 180 flow [2023-11-23 22:25:18,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-11-23 22:25:18,313 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-11-23 22:25:18,313 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 180 flow [2023-11-23 22:25:18,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:18,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:25:18,314 INFO L208 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] [2023-11-23 22:25:18,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:25:18,314 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)] === [2023-11-23 22:25:18,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1405742601, now seen corresponding path program 3 times [2023-11-23 22:25:18,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:18,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225084095] [2023-11-23 22:25:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:18,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:25:18,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:18,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225084095] [2023-11-23 22:25:18,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225084095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:18,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:18,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:25:18,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853071221] [2023-11-23 22:25:18,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:18,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:25:18,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:25:18,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:25:18,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-23 22:25:18,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:18,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:25:18,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-23 22:25:18,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:25:19,238 INFO L124 PetriNetUnfolderBase]: 2540/3714 cut-off events. [2023-11-23 22:25:19,238 INFO L125 PetriNetUnfolderBase]: For 3206/3213 co-relation queries the response was YES. [2023-11-23 22:25:19,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10117 conditions, 3714 events. 2540/3714 cut-off events. For 3206/3213 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 18174 event pairs, 401 based on Foata normal form. 68/3387 useless extension candidates. Maximal degree in co-relation 6428. Up to 1508 conditions per place. [2023-11-23 22:25:19,266 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 49 selfloop transitions, 3 changer transitions 60/119 dead transitions. [2023-11-23 22:25:19,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 119 transitions, 629 flow [2023-11-23 22:25:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:25:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:25:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2023-11-23 22:25:19,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6556776556776557 [2023-11-23 22:25:19,271 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 179 transitions. [2023-11-23 22:25:19,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 179 transitions. [2023-11-23 22:25:19,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:25:19,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 179 transitions. [2023-11-23 22:25:19,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:19,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 39.0) internal successors, (312), 8 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:19,278 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 39.0) internal successors, (312), 8 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:19,278 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 180 flow. Second operand 7 states and 179 transitions. [2023-11-23 22:25:19,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 119 transitions, 629 flow [2023-11-23 22:25:19,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 119 transitions, 629 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:25:19,297 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 170 flow [2023-11-23 22:25:19,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=170, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2023-11-23 22:25:19,299 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2023-11-23 22:25:19,299 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 170 flow [2023-11-23 22:25:19,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:19,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:25:19,300 INFO L208 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] [2023-11-23 22:25:19,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:25:19,301 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)] === [2023-11-23 22:25:19,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:19,302 INFO L85 PathProgramCache]: Analyzing trace with hash 105207035, now seen corresponding path program 1 times [2023-11-23 22:25:19,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:19,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352164914] [2023-11-23 22:25:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:19,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:25:19,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:19,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352164914] [2023-11-23 22:25:19,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352164914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:19,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:19,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:25:19,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889203788] [2023-11-23 22:25:19,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:19,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:25:19,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:19,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:25:19,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:19,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2023-11-23 22:25:19,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:19,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:25:19,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2023-11-23 22:25:19,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:25:19,726 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([350] L79-->L83: Formula: (and (not (= 0 (ite (< 0 v_~c2~0_66) 1 0))) (= v_~c2~0_66 (+ v_~c2~0_65 1)) (= v_~pos~0_100 (+ v_~pos~0_99 1))) InVars {~c2~0=v_~c2~0_66, ~pos~0=v_~pos~0_100} OutVars{thread2Thread1of1ForFork2_#t~post10#1=|v_thread2Thread1of1ForFork2_#t~post10#1_1|, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_1|, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_1|, ~pos~0=v_~pos~0_99, thread2Thread1of1ForFork2_#t~post9#1=|v_thread2Thread1of1ForFork2_#t~post9#1_1|, ~c2~0=v_~c2~0_65} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_#t~post10#1, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1, ~pos~0, thread2Thread1of1ForFork2_#t~post9#1, ~c2~0][41], [Black: 54#(and (= ~v_assert~0 1) (<= 0 ~pos~0)), 26#L61true, 37#L115-4true, Black: 65#true, Black: 67#(= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0), Black: 70#(and (<= (+ (* (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 256) 1) |thread2Thread1of1ForFork2_~cond~1#1|) (= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), 10#L83true, 94#(<= ~c1~0 0), Black: 79#(= ~v_assert~0 1), Black: 86#(and (= ~v_assert~0 1) (<= 1 |thread2Thread1of1ForFork2_~cond~1#1|) (<= (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 0)), 31#L96true, 76#true, Black: 84#(and (= ~v_assert~0 1) (<= 1 |thread2Thread1of1ForFork2_~cond~1#1|) (<= (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 0) (<= 0 ~pos~0)), Black: 82#(and (= ~v_assert~0 1) (<= 0 ~pos~0)), Black: 51#(= ~v_assert~0 1), Black: 56#(and (<= 1 |thread1Thread1of1ForFork1_~cond~0#1|) (<= (div |thread1Thread1of1ForFork1_~cond~0#1| 256) 0) (= ~v_assert~0 1) (<= 0 ~pos~0)), 68#(< (* (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 256) |thread2Thread1of1ForFork2_~cond~1#1|), Black: 50#(<= 0 ~pos~0)]) [2023-11-23 22:25:19,727 INFO L294 olderBase$Statistics]: this new event has 23 ancestors and is cut-off event [2023-11-23 22:25:19,727 INFO L297 olderBase$Statistics]: existing Event has 19 ancestors and is cut-off event [2023-11-23 22:25:19,727 INFO L297 olderBase$Statistics]: existing Event has 19 ancestors and is cut-off event [2023-11-23 22:25:19,727 INFO L297 olderBase$Statistics]: existing Event has 23 ancestors and is cut-off event [2023-11-23 22:25:19,750 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([350] L79-->L83: Formula: (and (not (= 0 (ite (< 0 v_~c2~0_66) 1 0))) (= v_~c2~0_66 (+ v_~c2~0_65 1)) (= v_~pos~0_100 (+ v_~pos~0_99 1))) InVars {~c2~0=v_~c2~0_66, ~pos~0=v_~pos~0_100} OutVars{thread2Thread1of1ForFork2_#t~post10#1=|v_thread2Thread1of1ForFork2_#t~post10#1_1|, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_1|, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_1|, ~pos~0=v_~pos~0_99, thread2Thread1of1ForFork2_#t~post9#1=|v_thread2Thread1of1ForFork2_#t~post9#1_1|, ~c2~0=v_~c2~0_65} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_#t~post10#1, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1, ~pos~0, thread2Thread1of1ForFork2_#t~post9#1, ~c2~0][41], [Black: 54#(and (= ~v_assert~0 1) (<= 0 ~pos~0)), 26#L61true, Black: 65#true, Black: 67#(= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0), Black: 70#(and (<= (+ (* (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 256) 1) |thread2Thread1of1ForFork2_~cond~1#1|) (= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), 10#L83true, 94#(<= ~c1~0 0), 38#L116-1true, Black: 79#(= ~v_assert~0 1), Black: 86#(and (= ~v_assert~0 1) (<= 1 |thread2Thread1of1ForFork2_~cond~1#1|) (<= (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 0)), 76#true, 31#L96true, Black: 84#(and (= ~v_assert~0 1) (<= 1 |thread2Thread1of1ForFork2_~cond~1#1|) (<= (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 0) (<= 0 ~pos~0)), Black: 82#(and (= ~v_assert~0 1) (<= 0 ~pos~0)), Black: 51#(= ~v_assert~0 1), Black: 56#(and (<= 1 |thread1Thread1of1ForFork1_~cond~0#1|) (<= (div |thread1Thread1of1ForFork1_~cond~0#1| 256) 0) (= ~v_assert~0 1) (<= 0 ~pos~0)), 68#(< (* (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 256) |thread2Thread1of1ForFork2_~cond~1#1|), Black: 50#(<= 0 ~pos~0)]) [2023-11-23 22:25:19,750 INFO L294 olderBase$Statistics]: this new event has 24 ancestors and is cut-off event [2023-11-23 22:25:19,751 INFO L297 olderBase$Statistics]: existing Event has 20 ancestors and is cut-off event [2023-11-23 22:25:19,751 INFO L297 olderBase$Statistics]: existing Event has 20 ancestors and is cut-off event [2023-11-23 22:25:19,751 INFO L297 olderBase$Statistics]: existing Event has 24 ancestors and is cut-off event [2023-11-23 22:25:19,795 INFO L124 PetriNetUnfolderBase]: 1832/2778 cut-off events. [2023-11-23 22:25:19,795 INFO L125 PetriNetUnfolderBase]: For 3457/3722 co-relation queries the response was YES. [2023-11-23 22:25:19,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7517 conditions, 2778 events. 1832/2778 cut-off events. For 3457/3722 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14236 event pairs, 541 based on Foata normal form. 161/2528 useless extension candidates. Maximal degree in co-relation 6678. Up to 1423 conditions per place. [2023-11-23 22:25:19,824 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 50 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-23 22:25:19,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 65 transitions, 353 flow [2023-11-23 22:25:19,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:25:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:25:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-11-23 22:25:19,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2023-11-23 22:25:19,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-11-23 22:25:19,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-11-23 22:25:19,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:25:19,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-11-23 22:25:19,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:19,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:19,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:19,830 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 170 flow. Second operand 3 states and 87 transitions. [2023-11-23 22:25:19,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 65 transitions, 353 flow [2023-11-23 22:25:19,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 327 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-11-23 22:25:19,848 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 164 flow [2023-11-23 22:25:19,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-11-23 22:25:19,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-11-23 22:25:19,853 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 164 flow [2023-11-23 22:25:19,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:19,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:25:19,855 INFO L208 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] [2023-11-23 22:25:19,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:25:19,856 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)] === [2023-11-23 22:25:19,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:19,857 INFO L85 PathProgramCache]: Analyzing trace with hash -942042371, now seen corresponding path program 1 times [2023-11-23 22:25:19,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:19,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280442346] [2023-11-23 22:25:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:19,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:25:19,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:19,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280442346] [2023-11-23 22:25:19,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280442346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:19,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:19,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:25:19,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75131215] [2023-11-23 22:25:19,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:19,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:25:19,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:25:19,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:19,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2023-11-23 22:25:19,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:19,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:25:19,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2023-11-23 22:25:19,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:25:20,360 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([350] L79-->L83: Formula: (and (not (= 0 (ite (< 0 v_~c2~0_66) 1 0))) (= v_~c2~0_66 (+ v_~c2~0_65 1)) (= v_~pos~0_100 (+ v_~pos~0_99 1))) InVars {~c2~0=v_~c2~0_66, ~pos~0=v_~pos~0_100} OutVars{thread2Thread1of1ForFork2_#t~post10#1=|v_thread2Thread1of1ForFork2_#t~post10#1_1|, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_1|, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_1|, ~pos~0=v_~pos~0_99, thread2Thread1of1ForFork2_#t~post9#1=|v_thread2Thread1of1ForFork2_#t~post9#1_1|, ~c2~0=v_~c2~0_65} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_#t~post10#1, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1, ~pos~0, thread2Thread1of1ForFork2_#t~post9#1, ~c2~0][45], [Black: 54#(and (= ~v_assert~0 1) (<= 0 ~pos~0)), 26#L61true, 37#L115-4true, Black: 65#true, Black: 67#(= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0), Black: 70#(and (<= (+ (* (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 256) 1) |thread2Thread1of1ForFork2_~cond~1#1|) (= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), 97#true, 10#L83true, 94#(<= ~c1~0 0), 31#L96true, Black: 56#(and (<= 1 |thread1Thread1of1ForFork1_~cond~0#1|) (<= (div |thread1Thread1of1ForFork1_~cond~0#1| 256) 0) (= ~v_assert~0 1) (<= 0 ~pos~0)), 68#(< (* (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 256) |thread2Thread1of1ForFork2_~cond~1#1|), Black: 50#(<= 0 ~pos~0)]) [2023-11-23 22:25:20,361 INFO L294 olderBase$Statistics]: this new event has 27 ancestors and is cut-off event [2023-11-23 22:25:20,361 INFO L297 olderBase$Statistics]: existing Event has 27 ancestors and is cut-off event [2023-11-23 22:25:20,361 INFO L297 olderBase$Statistics]: existing Event has 23 ancestors and is cut-off event [2023-11-23 22:25:20,361 INFO L297 olderBase$Statistics]: existing Event has 23 ancestors and is cut-off event [2023-11-23 22:25:20,379 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([350] L79-->L83: Formula: (and (not (= 0 (ite (< 0 v_~c2~0_66) 1 0))) (= v_~c2~0_66 (+ v_~c2~0_65 1)) (= v_~pos~0_100 (+ v_~pos~0_99 1))) InVars {~c2~0=v_~c2~0_66, ~pos~0=v_~pos~0_100} OutVars{thread2Thread1of1ForFork2_#t~post10#1=|v_thread2Thread1of1ForFork2_#t~post10#1_1|, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_1|, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_1|, ~pos~0=v_~pos~0_99, thread2Thread1of1ForFork2_#t~post9#1=|v_thread2Thread1of1ForFork2_#t~post9#1_1|, ~c2~0=v_~c2~0_65} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_#t~post10#1, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1, ~pos~0, thread2Thread1of1ForFork2_#t~post9#1, ~c2~0][45], [Black: 54#(and (= ~v_assert~0 1) (<= 0 ~pos~0)), 26#L61true, Black: 65#true, Black: 67#(= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0), Black: 70#(and (<= (+ (* (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 256) 1) |thread2Thread1of1ForFork2_~cond~1#1|) (= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), 97#true, 10#L83true, 94#(<= ~c1~0 0), 38#L116-1true, 31#L96true, 68#(< (* (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 256) |thread2Thread1of1ForFork2_~cond~1#1|), Black: 56#(and (<= 1 |thread1Thread1of1ForFork1_~cond~0#1|) (<= (div |thread1Thread1of1ForFork1_~cond~0#1| 256) 0) (= ~v_assert~0 1) (<= 0 ~pos~0)), Black: 50#(<= 0 ~pos~0)]) [2023-11-23 22:25:20,379 INFO L294 olderBase$Statistics]: this new event has 28 ancestors and is cut-off event [2023-11-23 22:25:20,379 INFO L297 olderBase$Statistics]: existing Event has 28 ancestors and is cut-off event [2023-11-23 22:25:20,379 INFO L297 olderBase$Statistics]: existing Event has 24 ancestors and is cut-off event [2023-11-23 22:25:20,380 INFO L297 olderBase$Statistics]: existing Event has 24 ancestors and is cut-off event [2023-11-23 22:25:20,417 INFO L124 PetriNetUnfolderBase]: 2475/3809 cut-off events. [2023-11-23 22:25:20,417 INFO L125 PetriNetUnfolderBase]: For 2947/3059 co-relation queries the response was YES. [2023-11-23 22:25:20,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9898 conditions, 3809 events. 2475/3809 cut-off events. For 2947/3059 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 20501 event pairs, 682 based on Foata normal form. 172/3410 useless extension candidates. Maximal degree in co-relation 6926. Up to 2418 conditions per place. [2023-11-23 22:25:20,461 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 49 selfloop transitions, 2 changer transitions 1/65 dead transitions. [2023-11-23 22:25:20,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 347 flow [2023-11-23 22:25:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:25:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:25:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2023-11-23 22:25:20,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7264957264957265 [2023-11-23 22:25:20,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 85 transitions. [2023-11-23 22:25:20,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 85 transitions. [2023-11-23 22:25:20,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:25:20,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 85 transitions. [2023-11-23 22:25:20,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:20,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:20,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:20,465 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 164 flow. Second operand 3 states and 85 transitions. [2023-11-23 22:25:20,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 347 flow [2023-11-23 22:25:20,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 65 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:25:20,479 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 176 flow [2023-11-23 22:25:20,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-11-23 22:25:20,482 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2023-11-23 22:25:20,482 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 176 flow [2023-11-23 22:25:20,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:20,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:25:20,483 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-11-23 22:25:20,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:25:20,483 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)] === [2023-11-23 22:25:20,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:20,485 INFO L85 PathProgramCache]: Analyzing trace with hash -663756311, now seen corresponding path program 1 times [2023-11-23 22:25:20,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:20,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270111422] [2023-11-23 22:25:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:20,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:25:20,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:20,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270111422] [2023-11-23 22:25:20,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270111422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:20,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23771164] [2023-11-23 22:25:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:20,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:20,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:25:20,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:25:20,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:25:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:20,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 22:25:20,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:25:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:25:21,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:25:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:25:21,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23771164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:25:21,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:25:21,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 9 [2023-11-23 22:25:21,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514154019] [2023-11-23 22:25:21,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:25:21,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:25:21,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:21,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:25:21,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:25:21,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-23 22:25:21,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 176 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:21,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:25:21,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-23 22:25:21,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:25:23,515 INFO L124 PetriNetUnfolderBase]: 9464/13936 cut-off events. [2023-11-23 22:25:23,516 INFO L125 PetriNetUnfolderBase]: For 14025/14025 co-relation queries the response was YES. [2023-11-23 22:25:23,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39205 conditions, 13936 events. 9464/13936 cut-off events. For 14025/14025 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 81777 event pairs, 266 based on Foata normal form. 232/12606 useless extension candidates. Maximal degree in co-relation 13687. Up to 1935 conditions per place. [2023-11-23 22:25:23,601 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 139 selfloop transitions, 26 changer transitions 148/320 dead transitions. [2023-11-23 22:25:23,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 320 transitions, 1824 flow [2023-11-23 22:25:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 22:25:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-23 22:25:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 492 transitions. [2023-11-23 22:25:23,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2023-11-23 22:25:23,605 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 492 transitions. [2023-11-23 22:25:23,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 492 transitions. [2023-11-23 22:25:23,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:25:23,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 492 transitions. [2023-11-23 22:25:23,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 24.6) internal successors, (492), 20 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:23,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 39.0) internal successors, (819), 21 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:23,611 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 39.0) internal successors, (819), 21 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:23,611 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 176 flow. Second operand 20 states and 492 transitions. [2023-11-23 22:25:23,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 320 transitions, 1824 flow [2023-11-23 22:25:23,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 320 transitions, 1812 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:25:23,625 INFO L231 Difference]: Finished difference. Result has 84 places, 61 transitions, 458 flow [2023-11-23 22:25:23,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=458, PETRI_PLACES=84, PETRI_TRANSITIONS=61} [2023-11-23 22:25:23,628 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2023-11-23 22:25:23,632 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 61 transitions, 458 flow [2023-11-23 22:25:23,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:23,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:25:23,633 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2023-11-23 22:25:23,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:25:23,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 22:25:23,854 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)] === [2023-11-23 22:25:23,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:23,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1239475231, now seen corresponding path program 2 times [2023-11-23 22:25:23,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:23,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972164649] [2023-11-23 22:25:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:23,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:25:24,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:24,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972164649] [2023-11-23 22:25:24,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972164649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:24,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582544928] [2023-11-23 22:25:24,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:25:24,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:24,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:25:24,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:25:24,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:25:24,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:25:24,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:25:24,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:25:24,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:25:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:25:24,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:25:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:25:24,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582544928] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:25:24,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:25:24,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 8 [2023-11-23 22:25:24,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875975833] [2023-11-23 22:25:24,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:25:24,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:25:24,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:24,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:25:24,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:25:24,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-23 22:25:24,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 61 transitions, 458 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:24,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:25:24,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-23 22:25:24,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:25:26,649 INFO L124 PetriNetUnfolderBase]: 7610/11471 cut-off events. [2023-11-23 22:25:26,650 INFO L125 PetriNetUnfolderBase]: For 69013/69202 co-relation queries the response was YES. [2023-11-23 22:25:26,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42731 conditions, 11471 events. 7610/11471 cut-off events. For 69013/69202 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 65162 event pairs, 821 based on Foata normal form. 927/10971 useless extension candidates. Maximal degree in co-relation 41155. Up to 3213 conditions per place. [2023-11-23 22:25:26,774 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 178 selfloop transitions, 30 changer transitions 13/233 dead transitions. [2023-11-23 22:25:26,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 233 transitions, 2118 flow [2023-11-23 22:25:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 22:25:26,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-23 22:25:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 303 transitions. [2023-11-23 22:25:26,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5976331360946746 [2023-11-23 22:25:26,777 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 303 transitions. [2023-11-23 22:25:26,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 303 transitions. [2023-11-23 22:25:26,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:25:26,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 303 transitions. [2023-11-23 22:25:26,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:26,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 39.0) internal successors, (546), 14 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:26,782 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 39.0) internal successors, (546), 14 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:26,783 INFO L175 Difference]: Start difference. First operand has 84 places, 61 transitions, 458 flow. Second operand 13 states and 303 transitions. [2023-11-23 22:25:26,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 233 transitions, 2118 flow [2023-11-23 22:25:26,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 233 transitions, 1838 flow, removed 119 selfloop flow, removed 10 redundant places. [2023-11-23 22:25:26,957 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 789 flow [2023-11-23 22:25:26,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=789, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2023-11-23 22:25:26,958 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2023-11-23 22:25:26,958 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 789 flow [2023-11-23 22:25:26,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:26,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:25:26,959 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2023-11-23 22:25:26,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:25:27,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 22:25:27,173 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)] === [2023-11-23 22:25:27,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:27,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2055204937, now seen corresponding path program 1 times [2023-11-23 22:25:27,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:27,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061876077] [2023-11-23 22:25:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:27,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:25:27,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:27,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061876077] [2023-11-23 22:25:27,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061876077] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:27,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066878505] [2023-11-23 22:25:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:27,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:27,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:25:27,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:25:27,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:25:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:27,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:25:27,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:25:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:25:27,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:25:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:25:27,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066878505] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:25:27,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:25:27,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 4 [2023-11-23 22:25:27,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104673396] [2023-11-23 22:25:27,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:25:27,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:25:27,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:27,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:25:27,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:25:27,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2023-11-23 22:25:27,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 789 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:27,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:25:27,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2023-11-23 22:25:27,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:25:30,795 INFO L124 PetriNetUnfolderBase]: 10776/16999 cut-off events. [2023-11-23 22:25:30,796 INFO L125 PetriNetUnfolderBase]: For 110266/111264 co-relation queries the response was YES. [2023-11-23 22:25:30,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67761 conditions, 16999 events. 10776/16999 cut-off events. For 110266/111264 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 112957 event pairs, 3677 based on Foata normal form. 729/15108 useless extension candidates. Maximal degree in co-relation 60958. Up to 5912 conditions per place. [2023-11-23 22:25:31,031 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 129 selfloop transitions, 12 changer transitions 0/164 dead transitions. [2023-11-23 22:25:31,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 164 transitions, 1881 flow [2023-11-23 22:25:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:25:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:25:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2023-11-23 22:25:31,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7628205128205128 [2023-11-23 22:25:31,034 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 119 transitions. [2023-11-23 22:25:31,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 119 transitions. [2023-11-23 22:25:31,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:25:31,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 119 transitions. [2023-11-23 22:25:31,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:31,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:31,036 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:31,036 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 789 flow. Second operand 4 states and 119 transitions. [2023-11-23 22:25:31,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 164 transitions, 1881 flow [2023-11-23 22:25:31,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 164 transitions, 1756 flow, removed 62 selfloop flow, removed 1 redundant places. [2023-11-23 22:25:31,249 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 882 flow [2023-11-23 22:25:31,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=882, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2023-11-23 22:25:31,253 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2023-11-23 22:25:31,253 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 882 flow [2023-11-23 22:25:31,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:31,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:25:31,254 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 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] [2023-11-23 22:25:31,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:25:31,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 22:25:31,476 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)] === [2023-11-23 22:25:31,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:31,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1262793569, now seen corresponding path program 3 times [2023-11-23 22:25:31,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:31,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910148306] [2023-11-23 22:25:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:31,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:25:31,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:31,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910148306] [2023-11-23 22:25:31,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910148306] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:31,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794135681] [2023-11-23 22:25:31,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:25:31,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:31,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:25:31,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:25:31,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:25:31,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 22:25:31,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:25:31,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:25:31,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:25:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:25:32,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:25:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:25:32,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794135681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:25:32,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:25:32,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2023-11-23 22:25:32,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552086341] [2023-11-23 22:25:32,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:25:32,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:25:32,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:32,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:25:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:25:32,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-23 22:25:32,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 882 flow. Second operand has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:32,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:25:32,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-23 22:25:32,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:25:38,922 INFO L124 PetriNetUnfolderBase]: 24423/36926 cut-off events. [2023-11-23 22:25:38,922 INFO L125 PetriNetUnfolderBase]: For 254108/254465 co-relation queries the response was YES. [2023-11-23 22:25:39,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153462 conditions, 36926 events. 24423/36926 cut-off events. For 254108/254465 co-relation queries the response was YES. Maximal size of possible extension queue 1337. Compared 248547 event pairs, 1353 based on Foata normal form. 1111/33394 useless extension candidates. Maximal degree in co-relation 146797. Up to 6927 conditions per place. [2023-11-23 22:25:39,252 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 154 selfloop transitions, 94 changer transitions 209/469 dead transitions. [2023-11-23 22:25:39,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 469 transitions, 5081 flow [2023-11-23 22:25:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 22:25:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-23 22:25:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 540 transitions. [2023-11-23 22:25:39,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5538461538461539 [2023-11-23 22:25:39,256 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 540 transitions. [2023-11-23 22:25:39,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 540 transitions. [2023-11-23 22:25:39,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:25:39,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 540 transitions. [2023-11-23 22:25:39,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 21.6) internal successors, (540), 25 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:39,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 39.0) internal successors, (1014), 26 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:39,262 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 39.0) internal successors, (1014), 26 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:39,262 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 882 flow. Second operand 25 states and 540 transitions. [2023-11-23 22:25:39,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 469 transitions, 5081 flow [2023-11-23 22:25:39,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 469 transitions, 5007 flow, removed 37 selfloop flow, removed 0 redundant places. [2023-11-23 22:25:39,742 INFO L231 Difference]: Finished difference. Result has 130 places, 150 transitions, 2222 flow [2023-11-23 22:25:39,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2222, PETRI_PLACES=130, PETRI_TRANSITIONS=150} [2023-11-23 22:25:39,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2023-11-23 22:25:39,744 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 150 transitions, 2222 flow [2023-11-23 22:25:39,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:39,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:25:39,745 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 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] [2023-11-23 22:25:39,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-23 22:25:39,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:39,967 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)] === [2023-11-23 22:25:39,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:39,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1751658751, now seen corresponding path program 4 times [2023-11-23 22:25:39,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:39,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299103357] [2023-11-23 22:25:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:39,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:25:40,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:40,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299103357] [2023-11-23 22:25:40,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299103357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:40,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66602051] [2023-11-23 22:25:40,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:25:40,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:40,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:25:40,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:25:40,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:25:40,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:25:40,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:25:40,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:25:40,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:25:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:25:40,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:25:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:25:40,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66602051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:25:40,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:25:40,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 5 [2023-11-23 22:25:40,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476441064] [2023-11-23 22:25:40,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:25:40,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:25:40,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:40,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:25:40,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:25:40,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2023-11-23 22:25:40,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 150 transitions, 2222 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:40,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:25:40,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2023-11-23 22:25:40,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:25:46,740 INFO L124 PetriNetUnfolderBase]: 22854/36263 cut-off events. [2023-11-23 22:25:46,740 INFO L125 PetriNetUnfolderBase]: For 521790/523090 co-relation queries the response was YES. [2023-11-23 22:25:47,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181963 conditions, 36263 events. 22854/36263 cut-off events. For 521790/523090 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 258490 event pairs, 6959 based on Foata normal form. 833/31739 useless extension candidates. Maximal degree in co-relation 180613. Up to 10269 conditions per place. [2023-11-23 22:25:47,228 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 224 selfloop transitions, 67 changer transitions 0/318 dead transitions. [2023-11-23 22:25:47,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 318 transitions, 5277 flow [2023-11-23 22:25:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:25:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:25:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2023-11-23 22:25:47,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8153846153846154 [2023-11-23 22:25:47,230 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 159 transitions. [2023-11-23 22:25:47,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 159 transitions. [2023-11-23 22:25:47,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:25:47,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 159 transitions. [2023-11-23 22:25:47,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:47,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:47,232 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:47,233 INFO L175 Difference]: Start difference. First operand has 130 places, 150 transitions, 2222 flow. Second operand 5 states and 159 transitions. [2023-11-23 22:25:47,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 318 transitions, 5277 flow [2023-11-23 22:25:51,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 318 transitions, 4690 flow, removed 290 selfloop flow, removed 10 redundant places. [2023-11-23 22:25:51,224 INFO L231 Difference]: Finished difference. Result has 114 places, 184 transitions, 2837 flow [2023-11-23 22:25:51,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2837, PETRI_PLACES=114, PETRI_TRANSITIONS=184} [2023-11-23 22:25:51,225 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2023-11-23 22:25:51,225 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 184 transitions, 2837 flow [2023-11-23 22:25:51,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:51,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:25:51,225 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 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] [2023-11-23 22:25:51,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:25:51,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 22:25:51,426 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)] === [2023-11-23 22:25:51,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:51,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1730388281, now seen corresponding path program 2 times [2023-11-23 22:25:51,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:51,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419652642] [2023-11-23 22:25:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:51,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:25:51,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419652642] [2023-11-23 22:25:51,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419652642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903072733] [2023-11-23 22:25:51,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:25:51,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:51,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:25:51,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:25:51,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a77a8cf0-40e7-42fe-818a-05d2fd633885/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:25:51,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:25:51,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:25:51,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:25:51,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:25:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:25:51,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:25:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:25:51,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903072733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:25:51,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:25:51,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 5 [2023-11-23 22:25:51,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907085621] [2023-11-23 22:25:51,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:25:51,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:25:51,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:51,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:25:51,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:25:51,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2023-11-23 22:25:51,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 184 transitions, 2837 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:51,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:25:51,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2023-11-23 22:25:51,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand