./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya --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 0.2.4-dev-0e0057c [2023-11-29 01:57:50,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:57:50,280 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:57:50,286 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:57:50,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:57:50,312 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:57:50,313 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:57:50,313 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:57:50,314 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:57:50,314 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:57:50,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:57:50,315 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:57:50,316 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:57:50,317 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:57:50,317 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:57:50,318 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:57:50,318 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:57:50,319 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:57:50,319 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:57:50,320 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:57:50,320 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:57:50,324 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:57:50,324 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:57:50,324 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:57:50,325 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:57:50,325 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:57:50,325 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:57:50,326 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:57:50,326 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:57:50,327 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:57:50,327 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:57:50,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:57:50,328 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:57:50,328 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:57:50,328 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:57:50,328 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:57:50,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:57:50,329 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:57:50,329 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:57:50,329 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:57:50,329 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:57:50,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:57:50,330 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_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 103efe8931e099ca6c2446ad32c4c46818a6d213fc850bc42032bda38d601e6f [2023-11-29 01:57:50,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:57:50,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:57:50,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:57:50,576 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:57:50,577 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:57:50,578 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2023-11-29 01:57:53,381 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:57:53,545 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:57:53,545 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2023-11-29 01:57:53,553 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/data/9a2360efb/b20d662cdabf4a2a8a8af674059a5919/FLAGd4940a7e5 [2023-11-29 01:57:53,568 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/data/9a2360efb/b20d662cdabf4a2a8a8af674059a5919 [2023-11-29 01:57:53,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:57:53,572 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:57:53,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:57:53,573 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:57:53,578 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:57:53,579 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,580 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@310451f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53, skipping insertion in model container [2023-11-29 01:57:53,581 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,604 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:57:53,779 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_2bc837ce-63ff-47e3-97d4-1ea85b98b167/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3066,3079] [2023-11-29 01:57:53,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:57:53,793 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:57:53,817 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_2bc837ce-63ff-47e3-97d4-1ea85b98b167/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3066,3079] [2023-11-29 01:57:53,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:57:53,826 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:57:53,826 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:57:53,834 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:57:53,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53 WrapperNode [2023-11-29 01:57:53,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:57:53,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:57:53,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:57:53,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:57:53,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,851 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,875 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 150 [2023-11-29 01:57:53,875 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:57:53,876 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:57:53,876 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:57:53,876 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:57:53,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,890 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,906 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 01:57:53,906 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,906 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,913 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,918 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,919 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,922 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:57:53,923 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:57:53,924 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:57:53,924 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:57:53,924 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (1/1) ... [2023-11-29 01:57:53,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:57:53,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:53,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:57:53,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:57:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:57:53,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 01:57:53,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 01:57:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 01:57:53,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 01:57:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 01:57:53,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 01:57:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:57:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:57:53,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:57:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:57:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:57:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:57:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:57:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:57:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:57:53,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 01:57:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 01:57:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:57:53,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:57:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:57:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:57:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:57:53,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:57:53,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:57:53,990 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 01:57:54,102 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:57:54,103 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:57:54,304 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:57:54,476 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:57:54,476 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 01:57:54,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:57:54 BoogieIcfgContainer [2023-11-29 01:57:54,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:57:54,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:57:54,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:57:54,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:57:54,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:57:53" (1/3) ... [2023-11-29 01:57:54,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23de6e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:57:54, skipping insertion in model container [2023-11-29 01:57:54,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:53" (2/3) ... [2023-11-29 01:57:54,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23de6e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:57:54, skipping insertion in model container [2023-11-29 01:57:54,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:57:54" (3/3) ... [2023-11-29 01:57:54,486 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-11-29 01:57:54,495 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 01:57:54,506 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:57:54,506 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:57:54,506 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 01:57:54,555 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 01:57:54,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 39 transitions, 99 flow [2023-11-29 01:57:54,616 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-11-29 01:57:54,616 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 01:57:54,634 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. [2023-11-29 01:57:54,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 39 transitions, 99 flow [2023-11-29 01:57:54,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 35 transitions, 88 flow [2023-11-29 01:57:54,645 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:57:54,652 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;@777551ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:57:54,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 01:57:54,679 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:57:54,679 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2023-11-29 01:57:54,680 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 01:57:54,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:54,680 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] [2023-11-29 01:57:54,681 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)] === [2023-11-29 01:57:54,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:54,686 INFO L85 PathProgramCache]: Analyzing trace with hash -290808675, now seen corresponding path program 1 times [2023-11-29 01:57:54,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:54,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805870978] [2023-11-29 01:57:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:54,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:57:55,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:55,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805870978] [2023-11-29 01:57:55,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805870978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:55,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:55,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:57:55,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681097446] [2023-11-29 01:57:55,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:55,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:57:55,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:55,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:57:55,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:57:55,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-29 01:57:55,297 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) [2023-11-29 01:57:55,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:55,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-29 01:57:55,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:55,964 INFO L124 PetriNetUnfolderBase]: 2888/4207 cut-off events. [2023-11-29 01:57:55,964 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2023-11-29 01:57:55,975 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. [2023-11-29 01:57:55,995 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 75 selfloop transitions, 5 changer transitions 42/129 dead transitions. [2023-11-29 01:57:55,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 129 transitions, 550 flow [2023-11-29 01:57:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:57:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 01:57:56,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2023-11-29 01:57:56,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7106227106227107 [2023-11-29 01:57:56,009 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 194 transitions. [2023-11-29 01:57:56,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 194 transitions. [2023-11-29 01:57:56,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:56,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 194 transitions. [2023-11-29 01:57:56,018 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) [2023-11-29 01:57:56,022 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) [2023-11-29 01:57:56,023 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) [2023-11-29 01:57:56,024 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 88 flow. Second operand 7 states and 194 transitions. [2023-11-29 01:57:56,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 129 transitions, 550 flow [2023-11-29 01:57:56,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 129 transitions, 518 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 01:57:56,057 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 127 flow [2023-11-29 01:57:56,059 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} [2023-11-29 01:57:56,062 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2023-11-29 01:57:56,063 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 127 flow [2023-11-29 01:57:56,063 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) [2023-11-29 01:57:56,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:56,063 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] [2023-11-29 01:57:56,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:57:56,064 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)] === [2023-11-29 01:57:56,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash 520836159, now seen corresponding path program 2 times [2023-11-29 01:57:56,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:56,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141948467] [2023-11-29 01:57:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:56,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:57:56,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:56,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141948467] [2023-11-29 01:57:56,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141948467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:56,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:56,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:57:56,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812399050] [2023-11-29 01:57:56,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:56,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:57:56,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:56,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:57:56,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:57:56,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-29 01:57:56,211 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) [2023-11-29 01:57:56,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:56,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-29 01:57:56,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:56,657 INFO L124 PetriNetUnfolderBase]: 2418/3505 cut-off events. [2023-11-29 01:57:56,657 INFO L125 PetriNetUnfolderBase]: For 2087/2090 co-relation queries the response was YES. [2023-11-29 01:57:56,662 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. [2023-11-29 01:57:56,681 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 65 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2023-11-29 01:57:56,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 404 flow [2023-11-29 01:57:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:57:56,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:57:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2023-11-29 01:57:56,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6102564102564103 [2023-11-29 01:57:56,683 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 119 transitions. [2023-11-29 01:57:56,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 119 transitions. [2023-11-29 01:57:56,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:56,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 119 transitions. [2023-11-29 01:57:56,685 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) [2023-11-29 01:57:56,686 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) [2023-11-29 01:57:56,686 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) [2023-11-29 01:57:56,686 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 127 flow. Second operand 5 states and 119 transitions. [2023-11-29 01:57:56,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 404 flow [2023-11-29 01:57:56,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 80 transitions, 392 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 01:57:56,696 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 180 flow [2023-11-29 01:57:56,696 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} [2023-11-29 01:57:56,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-11-29 01:57:56,697 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 180 flow [2023-11-29 01:57:56,697 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) [2023-11-29 01:57:56,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:56,698 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] [2023-11-29 01:57:56,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:57:56,698 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)] === [2023-11-29 01:57:56,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1405742601, now seen corresponding path program 3 times [2023-11-29 01:57:56,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:56,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161485314] [2023-11-29 01:57:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:56,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:57:56,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:56,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161485314] [2023-11-29 01:57:56,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161485314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:56,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:56,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:57:56,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101315140] [2023-11-29 01:57:56,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:56,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:57:56,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:56,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:57:56,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:57:56,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-29 01:57:56,880 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) [2023-11-29 01:57:56,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:56,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-29 01:57:56,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:57,459 INFO L124 PetriNetUnfolderBase]: 2540/3714 cut-off events. [2023-11-29 01:57:57,459 INFO L125 PetriNetUnfolderBase]: For 3206/3213 co-relation queries the response was YES. [2023-11-29 01:57:57,501 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. [2023-11-29 01:57:57,517 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 49 selfloop transitions, 3 changer transitions 60/119 dead transitions. [2023-11-29 01:57:57,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 119 transitions, 629 flow [2023-11-29 01:57:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:57:57,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 01:57:57,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2023-11-29 01:57:57,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6556776556776557 [2023-11-29 01:57:57,520 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 179 transitions. [2023-11-29 01:57:57,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 179 transitions. [2023-11-29 01:57:57,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:57,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 179 transitions. [2023-11-29 01:57:57,521 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) [2023-11-29 01:57:57,523 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) [2023-11-29 01:57:57,523 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) [2023-11-29 01:57:57,523 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 180 flow. Second operand 7 states and 179 transitions. [2023-11-29 01:57:57,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 119 transitions, 629 flow [2023-11-29 01:57:57,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 119 transitions, 629 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:57:57,538 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 170 flow [2023-11-29 01:57:57,538 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} [2023-11-29 01:57:57,539 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2023-11-29 01:57:57,539 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 170 flow [2023-11-29 01:57:57,539 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) [2023-11-29 01:57:57,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:57,539 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] [2023-11-29 01:57:57,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:57:57,540 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)] === [2023-11-29 01:57:57,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:57,540 INFO L85 PathProgramCache]: Analyzing trace with hash 105207035, now seen corresponding path program 1 times [2023-11-29 01:57:57,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:57,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644438383] [2023-11-29 01:57:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:57,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:57:57,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:57,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644438383] [2023-11-29 01:57:57,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644438383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:57,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:57,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:57:57,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338675278] [2023-11-29 01:57:57,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:57,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:57:57,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:57,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:57:57,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:57:57,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2023-11-29 01:57:57,618 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) [2023-11-29 01:57:57,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:57,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2023-11-29 01:57:57,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:57,892 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)]) [2023-11-29 01:57:57,892 INFO L294 olderBase$Statistics]: this new event has 23 ancestors and is cut-off event [2023-11-29 01:57:57,893 INFO L297 olderBase$Statistics]: existing Event has 19 ancestors and is cut-off event [2023-11-29 01:57:57,893 INFO L297 olderBase$Statistics]: existing Event has 19 ancestors and is cut-off event [2023-11-29 01:57:57,893 INFO L297 olderBase$Statistics]: existing Event has 23 ancestors and is cut-off event [2023-11-29 01:57:57,931 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)]) [2023-11-29 01:57:57,931 INFO L294 olderBase$Statistics]: this new event has 24 ancestors and is cut-off event [2023-11-29 01:57:57,931 INFO L297 olderBase$Statistics]: existing Event has 20 ancestors and is cut-off event [2023-11-29 01:57:57,931 INFO L297 olderBase$Statistics]: existing Event has 20 ancestors and is cut-off event [2023-11-29 01:57:57,931 INFO L297 olderBase$Statistics]: existing Event has 24 ancestors and is cut-off event [2023-11-29 01:57:57,968 INFO L124 PetriNetUnfolderBase]: 1832/2778 cut-off events. [2023-11-29 01:57:57,968 INFO L125 PetriNetUnfolderBase]: For 3457/3722 co-relation queries the response was YES. [2023-11-29 01:57:57,974 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. [2023-11-29 01:57:57,991 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 50 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-29 01:57:57,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 65 transitions, 353 flow [2023-11-29 01:57:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:57:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:57:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-11-29 01:57:57,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2023-11-29 01:57:57,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-11-29 01:57:57,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-11-29 01:57:57,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:57,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-11-29 01:57:57,994 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) [2023-11-29 01:57:57,995 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) [2023-11-29 01:57:57,995 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) [2023-11-29 01:57:57,995 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 170 flow. Second operand 3 states and 87 transitions. [2023-11-29 01:57:57,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 65 transitions, 353 flow [2023-11-29 01:57:58,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 327 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-11-29 01:57:58,004 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 164 flow [2023-11-29 01:57:58,004 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} [2023-11-29 01:57:58,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-11-29 01:57:58,006 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 164 flow [2023-11-29 01:57:58,006 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) [2023-11-29 01:57:58,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:58,006 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] [2023-11-29 01:57:58,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 01:57:58,006 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)] === [2023-11-29 01:57:58,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:58,007 INFO L85 PathProgramCache]: Analyzing trace with hash -942042371, now seen corresponding path program 1 times [2023-11-29 01:57:58,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:58,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800543289] [2023-11-29 01:57:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:58,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:57:58,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:58,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800543289] [2023-11-29 01:57:58,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800543289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:58,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:58,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:57:58,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280278156] [2023-11-29 01:57:58,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:58,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:57:58,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:58,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:57:58,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:57:58,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2023-11-29 01:57:58,084 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) [2023-11-29 01:57:58,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:58,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2023-11-29 01:57:58,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:58,437 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)]) [2023-11-29 01:57:58,437 INFO L294 olderBase$Statistics]: this new event has 27 ancestors and is cut-off event [2023-11-29 01:57:58,438 INFO L297 olderBase$Statistics]: existing Event has 27 ancestors and is cut-off event [2023-11-29 01:57:58,438 INFO L297 olderBase$Statistics]: existing Event has 23 ancestors and is cut-off event [2023-11-29 01:57:58,438 INFO L297 olderBase$Statistics]: existing Event has 23 ancestors and is cut-off event [2023-11-29 01:57:58,454 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([350] L79-->L83: Formula: (and (not (= 0 (ite (< 0 v_~c2~0_66) 1 0))) (= v_~c2~0_66 (+ v_~c2~0_65 1)) (= v_~pos~0_100 (+ v_~pos~0_99 1))) InVars {~c2~0=v_~c2~0_66, ~pos~0=v_~pos~0_100} OutVars{thread2Thread1of1ForFork2_#t~post10#1=|v_thread2Thread1of1ForFork2_#t~post10#1_1|, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_1|, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_1|, ~pos~0=v_~pos~0_99, thread2Thread1of1ForFork2_#t~post9#1=|v_thread2Thread1of1ForFork2_#t~post9#1_1|, ~c2~0=v_~c2~0_65} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_#t~post10#1, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1, ~pos~0, thread2Thread1of1ForFork2_#t~post9#1, ~c2~0][45], [Black: 54#(and (= ~v_assert~0 1) (<= 0 ~pos~0)), 26#L61true, Black: 65#true, Black: 67#(= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0), Black: 70#(and (<= (+ (* (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 256) 1) |thread2Thread1of1ForFork2_~cond~1#1|) (= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), 97#true, 10#L83true, 94#(<= ~c1~0 0), 38#L116-1true, 31#L96true, 68#(< (* (div |thread2Thread1of1ForFork2_~cond~1#1| 256) 256) |thread2Thread1of1ForFork2_~cond~1#1|), Black: 56#(and (<= 1 |thread1Thread1of1ForFork1_~cond~0#1|) (<= (div |thread1Thread1of1ForFork1_~cond~0#1| 256) 0) (= ~v_assert~0 1) (<= 0 ~pos~0)), Black: 50#(<= 0 ~pos~0)]) [2023-11-29 01:57:58,454 INFO L294 olderBase$Statistics]: this new event has 28 ancestors and is cut-off event [2023-11-29 01:57:58,454 INFO L297 olderBase$Statistics]: existing Event has 28 ancestors and is cut-off event [2023-11-29 01:57:58,454 INFO L297 olderBase$Statistics]: existing Event has 24 ancestors and is cut-off event [2023-11-29 01:57:58,454 INFO L297 olderBase$Statistics]: existing Event has 24 ancestors and is cut-off event [2023-11-29 01:57:58,489 INFO L124 PetriNetUnfolderBase]: 2475/3809 cut-off events. [2023-11-29 01:57:58,489 INFO L125 PetriNetUnfolderBase]: For 2947/3059 co-relation queries the response was YES. [2023-11-29 01:57:58,496 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. [2023-11-29 01:57:58,520 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 49 selfloop transitions, 2 changer transitions 1/65 dead transitions. [2023-11-29 01:57:58,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 347 flow [2023-11-29 01:57:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:57:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:57:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2023-11-29 01:57:58,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7264957264957265 [2023-11-29 01:57:58,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 85 transitions. [2023-11-29 01:57:58,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 85 transitions. [2023-11-29 01:57:58,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:57:58,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 85 transitions. [2023-11-29 01:57:58,523 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) [2023-11-29 01:57:58,523 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) [2023-11-29 01:57:58,524 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) [2023-11-29 01:57:58,524 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 164 flow. Second operand 3 states and 85 transitions. [2023-11-29 01:57:58,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 347 flow [2023-11-29 01:57:58,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 65 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:57:58,531 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 176 flow [2023-11-29 01:57:58,531 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} [2023-11-29 01:57:58,532 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2023-11-29 01:57:58,532 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 176 flow [2023-11-29 01:57:58,532 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) [2023-11-29 01:57:58,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:57:58,532 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] [2023-11-29 01:57:58,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 01:57:58,533 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)] === [2023-11-29 01:57:58,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:58,533 INFO L85 PathProgramCache]: Analyzing trace with hash -663756311, now seen corresponding path program 1 times [2023-11-29 01:57:58,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:58,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692654305] [2023-11-29 01:57:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:58,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:57:58,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:58,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692654305] [2023-11-29 01:57:58,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692654305] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:58,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421471893] [2023-11-29 01:57:58,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:58,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:58,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:58,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:58,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:57:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:58,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:57:58,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:57:58,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:57:59,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421471893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:59,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:57:59,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 9 [2023-11-29 01:57:59,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228857156] [2023-11-29 01:57:59,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:59,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:57:59,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:59,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:57:59,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:57:59,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-29 01:57:59,032 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) [2023-11-29 01:57:59,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:57:59,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-29 01:57:59,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:58:00,900 INFO L124 PetriNetUnfolderBase]: 9464/13936 cut-off events. [2023-11-29 01:58:00,900 INFO L125 PetriNetUnfolderBase]: For 14025/14025 co-relation queries the response was YES. [2023-11-29 01:58:00,929 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. [2023-11-29 01:58:00,972 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 139 selfloop transitions, 26 changer transitions 148/320 dead transitions. [2023-11-29 01:58:00,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 320 transitions, 1824 flow [2023-11-29 01:58:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 01:58:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 01:58:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 492 transitions. [2023-11-29 01:58:00,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2023-11-29 01:58:00,975 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 492 transitions. [2023-11-29 01:58:00,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 492 transitions. [2023-11-29 01:58:00,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:58:00,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 492 transitions. [2023-11-29 01:58:00,978 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) [2023-11-29 01:58:00,979 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) [2023-11-29 01:58:00,979 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) [2023-11-29 01:58:00,979 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 176 flow. Second operand 20 states and 492 transitions. [2023-11-29 01:58:00,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 320 transitions, 1824 flow [2023-11-29 01:58:00,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 320 transitions, 1812 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:58:00,989 INFO L231 Difference]: Finished difference. Result has 84 places, 61 transitions, 458 flow [2023-11-29 01:58:00,989 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} [2023-11-29 01:58:00,990 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2023-11-29 01:58:00,990 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 61 transitions, 458 flow [2023-11-29 01:58:00,991 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) [2023-11-29 01:58:00,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:58:00,991 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] [2023-11-29 01:58:01,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:01,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 01:58:01,195 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)] === [2023-11-29 01:58:01,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1239475231, now seen corresponding path program 2 times [2023-11-29 01:58:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:01,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872089929] [2023-11-29 01:58:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:01,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:58:01,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:01,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872089929] [2023-11-29 01:58:01,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872089929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:01,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224466746] [2023-11-29 01:58:01,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:58:01,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:01,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:01,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:01,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:58:01,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:58:01,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:01,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:58:01,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 01:58:01,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 01:58:01,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224466746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:01,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:01,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-29 01:58:01,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455720494] [2023-11-29 01:58:01,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:01,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:58:01,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:01,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:58:01,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:58:01,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-29 01:58:01,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 61 transitions, 458 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:01,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:58:01,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-29 01:58:01,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:58:02,899 INFO L124 PetriNetUnfolderBase]: 7406/11171 cut-off events. [2023-11-29 01:58:02,899 INFO L125 PetriNetUnfolderBase]: For 68129/68306 co-relation queries the response was YES. [2023-11-29 01:58:02,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41799 conditions, 11171 events. 7406/11171 cut-off events. For 68129/68306 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 62744 event pairs, 815 based on Foata normal form. 819/10587 useless extension candidates. Maximal degree in co-relation 40287. Up to 2320 conditions per place. [2023-11-29 01:58:02,963 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 205 selfloop transitions, 39 changer transitions 2/258 dead transitions. [2023-11-29 01:58:02,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 258 transitions, 2382 flow [2023-11-29 01:58:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:58:02,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 01:58:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 338 transitions. [2023-11-29 01:58:02,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-29 01:58:02,966 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 338 transitions. [2023-11-29 01:58:02,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 338 transitions. [2023-11-29 01:58:02,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:58:02,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 338 transitions. [2023-11-29 01:58:02,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 24.142857142857142) internal successors, (338), 14 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:02,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 39.0) internal successors, (585), 15 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:02,969 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 39.0) internal successors, (585), 15 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:02,969 INFO L175 Difference]: Start difference. First operand has 84 places, 61 transitions, 458 flow. Second operand 14 states and 338 transitions. [2023-11-29 01:58:02,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 258 transitions, 2382 flow [2023-11-29 01:58:03,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 258 transitions, 2066 flow, removed 138 selfloop flow, removed 10 redundant places. [2023-11-29 01:58:03,210 INFO L231 Difference]: Finished difference. Result has 90 places, 97 transitions, 932 flow [2023-11-29 01:58:03,210 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=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=932, PETRI_PLACES=90, PETRI_TRANSITIONS=97} [2023-11-29 01:58:03,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2023-11-29 01:58:03,210 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 97 transitions, 932 flow [2023-11-29 01:58:03,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:03,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:58:03,211 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] [2023-11-29 01:58:03,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:58:03,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 01:58:03,413 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)] === [2023-11-29 01:58:03,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:03,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1696655229, now seen corresponding path program 1 times [2023-11-29 01:58:03,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:03,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110374751] [2023-11-29 01:58:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:03,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:58:03,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:03,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110374751] [2023-11-29 01:58:03,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110374751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:03,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606545876] [2023-11-29 01:58:03,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:03,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:03,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:03,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:03,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:58:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:03,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:58:03,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:03,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:58:03,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606545876] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:03,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:03,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 4 [2023-11-29 01:58:03,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010619218] [2023-11-29 01:58:03,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:03,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:58:03,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:03,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:58:03,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:58:03,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2023-11-29 01:58:03,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 97 transitions, 932 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) [2023-11-29 01:58:03,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:58:03,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2023-11-29 01:58:03,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:58:06,072 INFO L124 PetriNetUnfolderBase]: 13454/20791 cut-off events. [2023-11-29 01:58:06,072 INFO L125 PetriNetUnfolderBase]: For 146125/147193 co-relation queries the response was YES. [2023-11-29 01:58:06,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83089 conditions, 20791 events. 13454/20791 cut-off events. For 146125/147193 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 138732 event pairs, 4745 based on Foata normal form. 885/18548 useless extension candidates. Maximal degree in co-relation 79861. Up to 7205 conditions per place. [2023-11-29 01:58:06,225 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 151 selfloop transitions, 12 changer transitions 0/191 dead transitions. [2023-11-29 01:58:06,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 191 transitions, 2252 flow [2023-11-29 01:58:06,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:58:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:58:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2023-11-29 01:58:06,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7628205128205128 [2023-11-29 01:58:06,226 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 119 transitions. [2023-11-29 01:58:06,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 119 transitions. [2023-11-29 01:58:06,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:58:06,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 119 transitions. [2023-11-29 01:58:06,227 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) [2023-11-29 01:58:06,227 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) [2023-11-29 01:58:06,228 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) [2023-11-29 01:58:06,228 INFO L175 Difference]: Start difference. First operand has 90 places, 97 transitions, 932 flow. Second operand 4 states and 119 transitions. [2023-11-29 01:58:06,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 191 transitions, 2252 flow [2023-11-29 01:58:06,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 191 transitions, 2070 flow, removed 91 selfloop flow, removed 0 redundant places. [2023-11-29 01:58:06,706 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 1004 flow [2023-11-29 01:58:06,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1004, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2023-11-29 01:58:06,707 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2023-11-29 01:58:06,707 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 1004 flow [2023-11-29 01:58:06,707 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) [2023-11-29 01:58:06,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:58:06,707 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] [2023-11-29 01:58:06,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:58:06,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 01:58:06,908 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)] === [2023-11-29 01:58:06,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash -719950187, now seen corresponding path program 3 times [2023-11-29 01:58:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:06,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122283418] [2023-11-29 01:58:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:06,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:58:07,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:07,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122283418] [2023-11-29 01:58:07,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122283418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:07,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925306022] [2023-11-29 01:58:07,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:58:07,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:07,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:07,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:07,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:58:07,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 01:58:07,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:07,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:58:07,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:58:07,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:58:07,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925306022] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:07,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:07,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-29 01:58:07,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977153939] [2023-11-29 01:58:07,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:07,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:58:07,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:07,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:58:07,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:58:07,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-29 01:58:07,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 1004 flow. Second operand has 16 states, 16 states have (on average 14.875) internal successors, (238), 16 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:07,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:58:07,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-29 01:58:07,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:58:22,420 INFO L124 PetriNetUnfolderBase]: 76362/112919 cut-off events. [2023-11-29 01:58:22,420 INFO L125 PetriNetUnfolderBase]: For 892310/894371 co-relation queries the response was YES. [2023-11-29 01:58:22,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474814 conditions, 112919 events. 76362/112919 cut-off events. For 892310/894371 co-relation queries the response was YES. Maximal size of possible extension queue 3390. Compared 832866 event pairs, 2783 based on Foata normal form. 3729/103081 useless extension candidates. Maximal degree in co-relation 458037. Up to 23389 conditions per place. [2023-11-29 01:58:23,099 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 523 selfloop transitions, 344 changer transitions 565/1444 dead transitions. [2023-11-29 01:58:23,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 1444 transitions, 15578 flow [2023-11-29 01:58:23,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-29 01:58:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-11-29 01:58:23,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 1632 transitions. [2023-11-29 01:58:23,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978021978021978 [2023-11-29 01:58:23,108 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 1632 transitions. [2023-11-29 01:58:23,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 1632 transitions. [2023-11-29 01:58:23,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:58:23,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 1632 transitions. [2023-11-29 01:58:23,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 23.314285714285713) internal successors, (1632), 70 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:23,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 39.0) internal successors, (2769), 71 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:23,119 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 39.0) internal successors, (2769), 71 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:23,119 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 1004 flow. Second operand 70 states and 1632 transitions. [2023-11-29 01:58:23,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 1444 transitions, 15578 flow [2023-11-29 01:58:29,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 1444 transitions, 15350 flow, removed 114 selfloop flow, removed 0 redundant places. [2023-11-29 01:58:29,217 INFO L231 Difference]: Finished difference. Result has 187 places, 456 transitions, 6807 flow [2023-11-29 01:58:29,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=6807, PETRI_PLACES=187, PETRI_TRANSITIONS=456} [2023-11-29 01:58:29,218 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2023-11-29 01:58:29,218 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 456 transitions, 6807 flow [2023-11-29 01:58:29,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.875) internal successors, (238), 16 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:29,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:58:29,218 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] [2023-11-29 01:58:29,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:58:29,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:29,419 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)] === [2023-11-29 01:58:29,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:29,419 INFO L85 PathProgramCache]: Analyzing trace with hash -329509403, now seen corresponding path program 2 times [2023-11-29 01:58:29,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:29,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489197040] [2023-11-29 01:58:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:29,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:58:29,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:29,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489197040] [2023-11-29 01:58:29,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489197040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:29,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701230712] [2023-11-29 01:58:29,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:58:29,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:29,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:29,554 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:29,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:58:29,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:58:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:29,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:58:29,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:58:29,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:58:29,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701230712] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:29,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:29,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 5 [2023-11-29 01:58:29,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534888748] [2023-11-29 01:58:29,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:29,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:58:29,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:58:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:58:29,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2023-11-29 01:58:29,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 456 transitions, 6807 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) [2023-11-29 01:58:29,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:58:29,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2023-11-29 01:58:29,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:58:50,728 INFO L124 PetriNetUnfolderBase]: 70995/109672 cut-off events. [2023-11-29 01:58:50,728 INFO L125 PetriNetUnfolderBase]: For 1442793/1447258 co-relation queries the response was YES. [2023-11-29 01:58:51,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521351 conditions, 109672 events. 70995/109672 cut-off events. For 1442793/1447258 co-relation queries the response was YES. Maximal size of possible extension queue 2134. Compared 863243 event pairs, 23898 based on Foata normal form. 2998/97484 useless extension candidates. Maximal degree in co-relation 519341. Up to 30912 conditions per place. [2023-11-29 01:58:52,003 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 635 selfloop transitions, 294 changer transitions 0/993 dead transitions. [2023-11-29 01:58:52,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 993 transitions, 17520 flow [2023-11-29 01:58:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:58:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:58:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2023-11-29 01:58:52,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7846153846153846 [2023-11-29 01:58:52,005 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 153 transitions. [2023-11-29 01:58:52,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 153 transitions. [2023-11-29 01:58:52,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:58:52,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 153 transitions. [2023-11-29 01:58:52,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:52,007 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) [2023-11-29 01:58:52,007 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) [2023-11-29 01:58:52,007 INFO L175 Difference]: Start difference. First operand has 187 places, 456 transitions, 6807 flow. Second operand 5 states and 153 transitions. [2023-11-29 01:58:52,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 993 transitions, 17520 flow [2023-11-29 01:59:27,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 993 transitions, 11778 flow, removed 2862 selfloop flow, removed 25 redundant places. [2023-11-29 01:59:27,831 INFO L231 Difference]: Finished difference. Result has 142 places, 625 transitions, 7618 flow [2023-11-29 01:59:27,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4601, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7618, PETRI_PLACES=142, PETRI_TRANSITIONS=625} [2023-11-29 01:59:27,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2023-11-29 01:59:27,832 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 625 transitions, 7618 flow [2023-11-29 01:59:27,832 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) [2023-11-29 01:59:27,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:27,832 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:27,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:59:28,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:59:28,033 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)] === [2023-11-29 01:59:28,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:28,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2010696995, now seen corresponding path program 4 times [2023-11-29 01:59:28,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:28,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696190566] [2023-11-29 01:59:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:28,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:59:28,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:28,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696190566] [2023-11-29 01:59:28,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696190566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:28,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544963037] [2023-11-29 01:59:28,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:59:28,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:28,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:28,211 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:28,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:59:28,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:59:28,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:59:28,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:59:28,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:59:28,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:59:28,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544963037] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:28,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:28,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2023-11-29 01:59:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113675570] [2023-11-29 01:59:28,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:28,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:59:28,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:28,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:59:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:59:28,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-29 01:59:28,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 625 transitions, 7618 flow. Second operand has 19 states, 19 states have (on average 15.052631578947368) internal successors, (286), 19 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:28,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:28,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-29 01:59:28,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:59,947 INFO L124 PetriNetUnfolderBase]: 344554/509921 cut-off events. [2023-11-29 02:00:59,948 INFO L125 PetriNetUnfolderBase]: For 2933981/2943430 co-relation queries the response was YES. [2023-11-29 02:01:02,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2063642 conditions, 509921 events. 344554/509921 cut-off events. For 2933981/2943430 co-relation queries the response was YES. Maximal size of possible extension queue 10737. Compared 4364877 event pairs, 11293 based on Foata normal form. 16583/466171 useless extension candidates. Maximal degree in co-relation 2036611. Up to 76443 conditions per place. [2023-11-29 02:01:03,824 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 975 selfloop transitions, 1790 changer transitions 2077/4854 dead transitions. [2023-11-29 02:01:03,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 4854 transitions, 64445 flow [2023-11-29 02:01:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-11-29 02:01:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2023-11-29 02:01:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 2763 transitions. [2023-11-29 02:01:03,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055226824457594 [2023-11-29 02:01:03,832 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 2763 transitions. [2023-11-29 02:01:03,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 2763 transitions. [2023-11-29 02:01:03,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:01:03,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 2763 transitions. [2023-11-29 02:01:03,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 23.615384615384617) internal successors, (2763), 117 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:03,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 39.0) internal successors, (4602), 118 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:03,850 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 39.0) internal successors, (4602), 118 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:03,851 INFO L175 Difference]: Start difference. First operand has 142 places, 625 transitions, 7618 flow. Second operand 117 states and 2763 transitions. [2023-11-29 02:01:03,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 4854 transitions, 64445 flow [2023-11-29 02:05:48,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 4854 transitions, 61455 flow, removed 1495 selfloop flow, removed 0 redundant places. [2023-11-29 02:05:48,355 INFO L231 Difference]: Finished difference. Result has 304 places, 2022 transitions, 30358 flow [2023-11-29 02:05:48,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7276, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=30358, PETRI_PLACES=304, PETRI_TRANSITIONS=2022} [2023-11-29 02:05:48,356 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2023-11-29 02:05:48,356 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 2022 transitions, 30358 flow [2023-11-29 02:05:48,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 15.052631578947368) internal successors, (286), 19 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:48,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:05:48,357 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:48,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:05:48,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:48,557 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 02:05:48,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:48,558 INFO L85 PathProgramCache]: Analyzing trace with hash -845900103, now seen corresponding path program 1 times [2023-11-29 02:05:48,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:48,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287266462] [2023-11-29 02:05:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:48,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:05:48,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:48,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287266462] [2023-11-29 02:05:48,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287266462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:48,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40387670] [2023-11-29 02:05:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:48,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:48,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:48,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:48,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc837ce-63ff-47e3-97d4-1ea85b98b167/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:05:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:48,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:05:48,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:05:48,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:05:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40387670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:48,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:05:48,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 5 [2023-11-29 02:05:48,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066594883] [2023-11-29 02:05:48,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:48,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:05:48,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:48,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:05:48,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:05:48,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2023-11-29 02:05:48,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 2022 transitions, 30358 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:48,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:05:48,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2023-11-29 02:05:48,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:07:58,648 INFO L124 PetriNetUnfolderBase]: 194002/300553 cut-off events. [2023-11-29 02:07:58,648 INFO L125 PetriNetUnfolderBase]: For 3782547/3789604 co-relation queries the response was YES. [2023-11-29 02:08:02,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397572 conditions, 300553 events. 194002/300553 cut-off events. For 3782547/3789604 co-relation queries the response was YES. Maximal size of possible extension queue 4917. Compared 2631062 event pairs, 71369 based on Foata normal form. 7526/264928 useless extension candidates. Maximal degree in co-relation 1396847. Up to 114412 conditions per place. [2023-11-29 02:08:04,613 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 1738 selfloop transitions, 443 changer transitions 0/2280 dead transitions. [2023-11-29 02:08:04,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 2280 transitions, 39122 flow [2023-11-29 02:08:04,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:08:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:08:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2023-11-29 02:08:04,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8153846153846154 [2023-11-29 02:08:04,615 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 159 transitions. [2023-11-29 02:08:04,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 159 transitions. [2023-11-29 02:08:04,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:08:04,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 159 transitions. [2023-11-29 02:08:04,616 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) [2023-11-29 02:08:04,617 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) [2023-11-29 02:08:04,617 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) [2023-11-29 02:08:04,617 INFO L175 Difference]: Start difference. First operand has 304 places, 2022 transitions, 30358 flow. Second operand 5 states and 159 transitions. [2023-11-29 02:08:04,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 2280 transitions, 39122 flow