./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i --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_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/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_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/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_4d43a6da-0cf4-49f4-994b-6d04b6c25237/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 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:06:00,695 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:06:00,760 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:06:00,764 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:06:00,765 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:06:00,789 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:06:00,789 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:06:00,790 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:06:00,790 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:06:00,791 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:06:00,792 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:06:00,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:06:00,793 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:06:00,794 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:06:00,794 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:06:00,795 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:06:00,795 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:06:00,796 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:06:00,796 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:06:00,797 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:06:00,797 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:06:00,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:06:00,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:06:00,799 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:06:00,800 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:06:00,800 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:06:00,801 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:06:00,801 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:06:00,802 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:06:00,802 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:06:00,803 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:06:00,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:06:00,803 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:06:00,804 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:06:00,804 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:06:00,804 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:06:00,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:06:00,804 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:06:00,804 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:06:00,805 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:06:00,805 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:06:00,805 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:06:00,805 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_4d43a6da-0cf4-49f4-994b-6d04b6c25237/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 [2023-11-29 05:06:01,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:06:01,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:06:01,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:06:01,072 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:06:01,073 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:06:01,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2023-11-29 05:06:04,133 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:06:04,384 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:06:04,385 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2023-11-29 05:06:04,402 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/data/702f74079/53c0f43dc7f54ebc939cb9033556bcc5/FLAGc3b310acd [2023-11-29 05:06:04,418 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/data/702f74079/53c0f43dc7f54ebc939cb9033556bcc5 [2023-11-29 05:06:04,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:06:04,421 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:06:04,422 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:06:04,423 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:06:04,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:06:04,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:04,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41612400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04, skipping insertion in model container [2023-11-29 05:06:04,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:04,485 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:06:04,808 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_4d43a6da-0cf4-49f4-994b-6d04b6c25237/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2023-11-29 05:06:04,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:06:04,848 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:06:04,885 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_4d43a6da-0cf4-49f4-994b-6d04b6c25237/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2023-11-29 05:06:04,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:06:04,942 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:06:04,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04 WrapperNode [2023-11-29 05:06:04,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:06:04,944 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:06:04,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:06:04,945 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:06:04,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:04,970 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:04,997 INFO L138 Inliner]: procedures = 171, calls = 40, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-11-29 05:06:04,997 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:06:04,998 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:06:04,998 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:06:04,999 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:06:05,012 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:05,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:05,015 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:05,032 INFO L175 MemorySlicer]: Split 20 memory accesses to 5 slices as follows [2, 5, 6, 5, 2]. 30 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5, 0]. The 3 writes are split as follows [0, 0, 2, 0, 1]. [2023-11-29 05:06:05,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:05,033 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:05,043 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:05,047 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:05,049 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:05,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:05,054 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:06:05,055 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:06:05,056 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:06:05,056 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:06:05,057 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (1/1) ... [2023-11-29 05:06:05,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:06:05,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:06:05,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:06:05,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:06:05,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:06:05,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:06:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:06:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:06:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:06:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:06:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:06:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:06:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:06:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:06:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 05:06:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:06:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:06:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 05:06:05,133 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 05:06:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:06:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:06:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:06:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:06:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:06:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:06:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 05:06:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:06:05,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:06:05,137 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 05:06:05,296 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:06:05,298 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:06:05,497 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:06:05,676 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:06:05,677 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-29 05:06:05,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:06:05 BoogieIcfgContainer [2023-11-29 05:06:05,677 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:06:05,680 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:06:05,680 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:06:05,683 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:06:05,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:06:04" (1/3) ... [2023-11-29 05:06:05,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210fa9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:06:05, skipping insertion in model container [2023-11-29 05:06:05,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:06:04" (2/3) ... [2023-11-29 05:06:05,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210fa9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:06:05, skipping insertion in model container [2023-11-29 05:06:05,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:06:05" (3/3) ... [2023-11-29 05:06:05,685 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2023-11-29 05:06:05,692 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:06:05,701 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:06:05,701 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:06:05,701 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:06:05,734 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-29 05:06:05,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 46 transitions, 99 flow [2023-11-29 05:06:05,796 INFO L124 PetriNetUnfolderBase]: 13/63 cut-off events. [2023-11-29 05:06:05,796 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 05:06:05,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 63 events. 13/63 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 189 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-11-29 05:06:05,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 46 transitions, 99 flow [2023-11-29 05:06:05,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 44 transitions, 92 flow [2023-11-29 05:06:05,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:06:05,819 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;@7cf8217e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:06:05,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 05:06:05,829 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:06:05,829 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-11-29 05:06:05,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:06:05,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:05,830 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 05:06:05,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:06:05,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1419434531, now seen corresponding path program 1 times [2023-11-29 05:06:05,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:05,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441407416] [2023-11-29 05:06:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:05,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 05:06:05,980 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 05:06:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 05:06:06,038 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 05:06:06,041 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 05:06:06,042 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 05:06:06,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 05:06:06,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:06:06,045 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-29 05:06:06,049 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 05:06:06,050 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 05:06:06,075 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 05:06:06,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 71 transitions, 158 flow [2023-11-29 05:06:06,110 INFO L124 PetriNetUnfolderBase]: 24/112 cut-off events. [2023-11-29 05:06:06,110 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-29 05:06:06,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 112 events. 24/112 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 437 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 69. Up to 6 conditions per place. [2023-11-29 05:06:06,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 71 transitions, 158 flow [2023-11-29 05:06:06,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 71 transitions, 158 flow [2023-11-29 05:06:06,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:06:06,118 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;@7cf8217e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:06:06,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 05:06:06,126 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:06:06,126 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-29 05:06:06,126 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 05:06:06,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:06,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:06:06,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:06:06,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:06,127 INFO L85 PathProgramCache]: Analyzing trace with hash -776146453, now seen corresponding path program 1 times [2023-11-29 05:06:06,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:06,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089144474] [2023-11-29 05:06:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:06,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:06,253 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 05:06:06,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:06:06,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089144474] [2023-11-29 05:06:06,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089144474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:06:06,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:06:06,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:06:06,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076876986] [2023-11-29 05:06:06,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:06:06,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:06:06,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:06:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:06:06,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:06:06,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 71 [2023-11-29 05:06:06,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 71 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 05:06:06,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:06,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 71 [2023-11-29 05:06:06,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:06,949 INFO L124 PetriNetUnfolderBase]: 1858/3805 cut-off events. [2023-11-29 05:06:06,950 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-29 05:06:06,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6883 conditions, 3805 events. 1858/3805 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 27326 event pairs, 1723 based on Foata normal form. 1056/4531 useless extension candidates. Maximal degree in co-relation 5002. Up to 3009 conditions per place. [2023-11-29 05:06:06,975 INFO L140 encePairwiseOnDemand]: 53/71 looper letters, 35 selfloop transitions, 2 changer transitions 10/67 dead transitions. [2023-11-29 05:06:06,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 238 flow [2023-11-29 05:06:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:06:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:06:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-29 05:06:06,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6338028169014085 [2023-11-29 05:06:06,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-29 05:06:06,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-29 05:06:06,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:06,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-29 05:06:06,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 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 05:06:06,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 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 05:06:06,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 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 05:06:06,999 INFO L175 Difference]: Start difference. First operand has 59 places, 71 transitions, 158 flow. Second operand 3 states and 135 transitions. [2023-11-29 05:06:07,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 238 flow [2023-11-29 05:06:07,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 67 transitions, 238 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:06:07,008 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 114 flow [2023-11-29 05:06:07,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-11-29 05:06:07,013 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-11-29 05:06:07,014 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 114 flow [2023-11-29 05:06:07,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 05:06:07,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:07,014 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-29 05:06:07,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:06:07,015 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:06:07,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1753766693, now seen corresponding path program 1 times [2023-11-29 05:06:07,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:07,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754827074] [2023-11-29 05:06:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:07,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 05:06:07,046 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 05:06:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 05:06:07,072 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 05:06:07,072 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 05:06:07,073 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 05:06:07,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 05:06:07,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:06:07,073 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-29 05:06:07,074 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 05:06:07,074 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 05:06:07,104 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 05:06:07,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 96 transitions, 219 flow [2023-11-29 05:06:07,124 INFO L124 PetriNetUnfolderBase]: 38/172 cut-off events. [2023-11-29 05:06:07,124 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-11-29 05:06:07,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 172 events. 38/172 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 734 event pairs, 1 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 123. Up to 12 conditions per place. [2023-11-29 05:06:07,125 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 96 transitions, 219 flow [2023-11-29 05:06:07,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 96 transitions, 219 flow [2023-11-29 05:06:07,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:06:07,130 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;@7cf8217e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:06:07,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 05:06:07,133 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:06:07,134 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-29 05:06:07,134 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 05:06:07,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:07,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:06:07,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:06:07,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:07,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2063865323, now seen corresponding path program 1 times [2023-11-29 05:06:07,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:07,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588098491] [2023-11-29 05:06:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:07,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:07,215 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 05:06:07,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:06:07,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588098491] [2023-11-29 05:06:07,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588098491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:06:07,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:06:07,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:06:07,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106309949] [2023-11-29 05:06:07,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:06:07,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:06:07,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:06:07,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:06:07,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:06:07,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2023-11-29 05:06:07,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 96 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 05:06:07,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:07,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2023-11-29 05:06:07,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:12,445 INFO L124 PetriNetUnfolderBase]: 29927/49891 cut-off events. [2023-11-29 05:06:12,446 INFO L125 PetriNetUnfolderBase]: For 1369/1369 co-relation queries the response was YES. [2023-11-29 05:06:12,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92784 conditions, 49891 events. 29927/49891 cut-off events. For 1369/1369 co-relation queries the response was YES. Maximal size of possible extension queue 1474. Compared 435652 event pairs, 19222 based on Foata normal form. 15616/61952 useless extension candidates. Maximal degree in co-relation 7041. Up to 42082 conditions per place. [2023-11-29 05:06:12,678 INFO L140 encePairwiseOnDemand]: 72/96 looper letters, 45 selfloop transitions, 2 changer transitions 11/86 dead transitions. [2023-11-29 05:06:12,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 86 transitions, 309 flow [2023-11-29 05:06:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:06:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:06:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2023-11-29 05:06:12,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-29 05:06:12,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 176 transitions. [2023-11-29 05:06:12,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 176 transitions. [2023-11-29 05:06:12,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:12,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 176 transitions. [2023-11-29 05:06:12,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 05:06:12,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 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 05:06:12,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 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 05:06:12,687 INFO L175 Difference]: Start difference. First operand has 79 places, 96 transitions, 219 flow. Second operand 3 states and 176 transitions. [2023-11-29 05:06:12,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 86 transitions, 309 flow [2023-11-29 05:06:12,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 309 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:06:12,693 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 158 flow [2023-11-29 05:06:12,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2023-11-29 05:06:12,695 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 3 predicate places. [2023-11-29 05:06:12,695 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 158 flow [2023-11-29 05:06:12,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 05:06:12,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:12,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:06:12,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:06:12,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:06:12,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash 919911045, now seen corresponding path program 1 times [2023-11-29 05:06:12,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:12,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304287800] [2023-11-29 05:06:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:12,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:12,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:06:12,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304287800] [2023-11-29 05:06:12,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304287800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:06:12,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790078479] [2023-11-29 05:06:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:12,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:12,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:06:12,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:06:12,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:06:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:12,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:06:12,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:12,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:06:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:06:12,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790078479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:06:12,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:06:12,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 05:06:12,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503347777] [2023-11-29 05:06:12,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:06:12,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:06:12,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:06:12,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:06:12,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:06:12,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2023-11-29 05:06:12,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 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 05:06:12,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:12,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2023-11-29 05:06:12,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:14,505 INFO L124 PetriNetUnfolderBase]: 7668/13190 cut-off events. [2023-11-29 05:06:14,505 INFO L125 PetriNetUnfolderBase]: For 3038/3038 co-relation queries the response was YES. [2023-11-29 05:06:14,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25750 conditions, 13190 events. 7668/13190 cut-off events. For 3038/3038 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 99026 event pairs, 888 based on Foata normal form. 1110/14143 useless extension candidates. Maximal degree in co-relation 23037. Up to 7400 conditions per place. [2023-11-29 05:06:14,575 INFO L140 encePairwiseOnDemand]: 93/96 looper letters, 88 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2023-11-29 05:06:14,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 446 flow [2023-11-29 05:06:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:06:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:06:14,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 281 transitions. [2023-11-29 05:06:14,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878472222222222 [2023-11-29 05:06:14,578 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 281 transitions. [2023-11-29 05:06:14,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 281 transitions. [2023-11-29 05:06:14,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:14,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 281 transitions. [2023-11-29 05:06:14,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 46.833333333333336) internal successors, (281), 6 states have internal predecessors, (281), 0 states have call successors, (0), 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 05:06:14,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 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 05:06:14,585 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 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 05:06:14,585 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 158 flow. Second operand 6 states and 281 transitions. [2023-11-29 05:06:14,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 446 flow [2023-11-29 05:06:14,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 442 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 05:06:14,593 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 152 flow [2023-11-29 05:06:14,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-11-29 05:06:14,595 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -7 predicate places. [2023-11-29 05:06:14,595 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 152 flow [2023-11-29 05:06:14,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 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 05:06:14,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:14,596 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-29 05:06:14,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:06:14,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:14,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:06:14,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:14,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1461485630, now seen corresponding path program 1 times [2023-11-29 05:06:14,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:14,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918183608] [2023-11-29 05:06:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:14,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 05:06:14,821 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 05:06:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 05:06:14,843 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 05:06:14,843 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 05:06:14,843 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 05:06:14,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 05:06:14,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 05:06:14,844 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 05:06:14,845 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 05:06:14,845 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 05:06:14,879 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 05:06:14,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 121 transitions, 282 flow [2023-11-29 05:06:14,905 INFO L124 PetriNetUnfolderBase]: 60/256 cut-off events. [2023-11-29 05:06:14,905 INFO L125 PetriNetUnfolderBase]: For 48/53 co-relation queries the response was YES. [2023-11-29 05:06:14,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 256 events. 60/256 cut-off events. For 48/53 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1145 event pairs, 6 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 196. Up to 32 conditions per place. [2023-11-29 05:06:14,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 121 transitions, 282 flow [2023-11-29 05:06:14,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 121 transitions, 282 flow [2023-11-29 05:06:14,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:06:14,912 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;@7cf8217e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:06:14,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 05:06:14,916 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:06:14,916 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-29 05:06:14,916 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 05:06:14,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:14,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:06:14,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:06:14,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:14,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1348496203, now seen corresponding path program 1 times [2023-11-29 05:06:14,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:14,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893810197] [2023-11-29 05:06:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:14,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:14,945 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 05:06:14,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:06:14,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893810197] [2023-11-29 05:06:14,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893810197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:06:14,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:06:14,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:06:14,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082306850] [2023-11-29 05:06:14,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:06:14,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:06:14,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:06:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:06:14,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:06:14,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 121 [2023-11-29 05:06:14,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 121 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 05:06:14,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:14,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 121 [2023-11-29 05:06:14,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:07:19,147 INFO L124 PetriNetUnfolderBase]: 423223/627007 cut-off events. [2023-11-29 05:07:19,147 INFO L125 PetriNetUnfolderBase]: For 20206/20206 co-relation queries the response was YES. [2023-11-29 05:07:20,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188308 conditions, 627007 events. 423223/627007 cut-off events. For 20206/20206 co-relation queries the response was YES. Maximal size of possible extension queue 14420. Compared 5973864 event pairs, 310998 based on Foata normal form. 208712/797059 useless extension candidates. Maximal degree in co-relation 92950. Up to 550528 conditions per place. [2023-11-29 05:07:21,949 INFO L140 encePairwiseOnDemand]: 91/121 looper letters, 55 selfloop transitions, 2 changer transitions 12/105 dead transitions. [2023-11-29 05:07:21,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 105 transitions, 382 flow [2023-11-29 05:07:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:07:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:07:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2023-11-29 05:07:21,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977961432506887 [2023-11-29 05:07:21,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 217 transitions. [2023-11-29 05:07:21,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 217 transitions. [2023-11-29 05:07:21,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:07:21,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 217 transitions. [2023-11-29 05:07:21,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 05:07:21,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 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 05:07:21,956 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 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 05:07:21,956 INFO L175 Difference]: Start difference. First operand has 99 places, 121 transitions, 282 flow. Second operand 3 states and 217 transitions. [2023-11-29 05:07:21,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 105 transitions, 382 flow [2023-11-29 05:07:21,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 105 transitions, 382 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:07:21,978 INFO L231 Difference]: Finished difference. Result has 102 places, 83 transitions, 204 flow [2023-11-29 05:07:21,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=102, PETRI_TRANSITIONS=83} [2023-11-29 05:07:21,980 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 3 predicate places. [2023-11-29 05:07:21,980 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 83 transitions, 204 flow [2023-11-29 05:07:21,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 05:07:21,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:07:21,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:07:21,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:07:21,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:07:21,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:07:21,981 INFO L85 PathProgramCache]: Analyzing trace with hash -75951787, now seen corresponding path program 1 times [2023-11-29 05:07:21,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:07:21,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708438424] [2023-11-29 05:07:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:07:21,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:07:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:07:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:07:22,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:07:22,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708438424] [2023-11-29 05:07:22,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708438424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:07:22,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649831834] [2023-11-29 05:07:22,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:07:22,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:07:22,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:07:22,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:07:22,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:07:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:07:22,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:07:22,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:07:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:07:22,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:07:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:07:22,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649831834] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:07:22,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:07:22,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 05:07:22,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358385012] [2023-11-29 05:07:22,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:07:22,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:07:22,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:07:22,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:07:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:07:22,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 121 [2023-11-29 05:07:22,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 83 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 41.285714285714285) internal successors, (289), 7 states have internal predecessors, (289), 0 states have call successors, (0), 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 05:07:22,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:07:22,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 121 [2023-11-29 05:07:22,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:07:51,012 INFO L124 PetriNetUnfolderBase]: 214668/321190 cut-off events. [2023-11-29 05:07:51,012 INFO L125 PetriNetUnfolderBase]: For 34038/34038 co-relation queries the response was YES. [2023-11-29 05:07:51,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625751 conditions, 321190 events. 214668/321190 cut-off events. For 34038/34038 co-relation queries the response was YES. Maximal size of possible extension queue 7892. Compared 2907444 event pairs, 41888 based on Foata normal form. 1110/317443 useless extension candidates. Maximal degree in co-relation 561837. Up to 184001 conditions per place. [2023-11-29 05:07:52,970 INFO L140 encePairwiseOnDemand]: 117/121 looper letters, 137 selfloop transitions, 6 changer transitions 0/179 dead transitions. [2023-11-29 05:07:52,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 179 transitions, 686 flow [2023-11-29 05:07:52,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:07:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:07:52,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 380 transitions. [2023-11-29 05:07:52,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234159779614325 [2023-11-29 05:07:52,973 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 380 transitions. [2023-11-29 05:07:52,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 380 transitions. [2023-11-29 05:07:52,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:07:52,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 380 transitions. [2023-11-29 05:07:52,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.333333333333336) internal successors, (380), 6 states have internal predecessors, (380), 0 states have call successors, (0), 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 05:07:52,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 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 05:07:52,978 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 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 05:07:52,978 INFO L175 Difference]: Start difference. First operand has 102 places, 83 transitions, 204 flow. Second operand 6 states and 380 transitions. [2023-11-29 05:07:52,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 179 transitions, 686 flow [2023-11-29 05:07:52,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 179 transitions, 678 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-29 05:07:52,995 INFO L231 Difference]: Finished difference. Result has 102 places, 86 transitions, 236 flow [2023-11-29 05:07:52,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=102, PETRI_TRANSITIONS=86} [2023-11-29 05:07:52,996 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 3 predicate places. [2023-11-29 05:07:52,997 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 86 transitions, 236 flow [2023-11-29 05:07:52,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.285714285714285) internal successors, (289), 7 states have internal predecessors, (289), 0 states have call successors, (0), 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 05:07:52,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:07:52,998 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-29 05:07:53,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:07:53,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d43a6da-0cf4-49f4-994b-6d04b6c25237/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:07:53,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:07:53,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:07:53,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1470376715, now seen corresponding path program 1 times [2023-11-29 05:07:53,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:07:53,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536221664] [2023-11-29 05:07:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:07:53,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:07:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 05:07:53,223 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 05:07:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 05:07:53,241 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 05:07:53,242 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 05:07:53,242 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 05:07:53,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 05:07:53,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 05:07:53,243 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 05:07:53,244 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 05:07:53,244 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-29 05:07:53,277 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-29 05:07:53,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 146 transitions, 347 flow [2023-11-29 05:07:53,317 INFO L124 PetriNetUnfolderBase]: 102/392 cut-off events. [2023-11-29 05:07:53,318 INFO L125 PetriNetUnfolderBase]: For 110/117 co-relation queries the response was YES. [2023-11-29 05:07:53,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 392 events. 102/392 cut-off events. For 110/117 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1902 event pairs, 23 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 306. Up to 80 conditions per place. [2023-11-29 05:07:53,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 146 transitions, 347 flow [2023-11-29 05:07:53,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 146 transitions, 347 flow [2023-11-29 05:07:53,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:07:53,326 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;@7cf8217e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:07:53,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 05:07:53,329 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:07:53,329 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-29 05:07:53,329 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 05:07:53,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:07:53,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:07:53,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:07:53,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:07:53,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1372713483, now seen corresponding path program 1 times [2023-11-29 05:07:53,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:07:53,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48982574] [2023-11-29 05:07:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:07:53,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:07:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:07:53,359 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 05:07:53,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:07:53,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48982574] [2023-11-29 05:07:53,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48982574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:07:53,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:07:53,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:07:53,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164802624] [2023-11-29 05:07:53,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:07:53,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:07:53,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:07:53,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:07:53,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:07:53,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 146 [2023-11-29 05:07:53,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 146 transitions, 347 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 05:07:53,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:07:53,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 146 [2023-11-29 05:07:53,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand