./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/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_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3aaecf4b84c8f01be47d1e624871b73f33541df72e3693614a0a3bb5cc7a97b5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:22:11,937 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:22:12,007 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 02:22:12,013 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:22:12,014 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:22:12,041 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:22:12,042 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:22:12,042 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:22:12,043 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:22:12,044 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:22:12,044 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:22:12,045 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:22:12,046 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:22:12,046 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:22:12,047 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:22:12,048 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:22:12,048 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:22:12,049 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:22:12,049 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:22:12,050 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:22:12,050 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:22:12,051 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:22:12,052 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:22:12,052 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:22:12,053 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:22:12,053 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:22:12,054 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:22:12,054 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:22:12,055 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:22:12,055 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:22:12,055 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:22:12,056 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:22:12,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:22:12,057 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:22:12,057 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:22:12,057 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:22:12,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:22:12,058 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:22:12,058 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:22:12,058 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:22:12,058 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:22:12,059 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_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3aaecf4b84c8f01be47d1e624871b73f33541df72e3693614a0a3bb5cc7a97b5 [2023-11-29 02:22:12,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:22:12,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:22:12,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:22:12,332 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:22:12,333 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:22:12,334 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2023-11-29 02:22:15,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:22:15,731 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:22:15,732 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2023-11-29 02:22:15,748 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/data/b0605db49/78fc6ec44c34443ca28290fa3ad88efb/FLAG430b3127e [2023-11-29 02:22:15,763 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/data/b0605db49/78fc6ec44c34443ca28290fa3ad88efb [2023-11-29 02:22:15,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:22:15,767 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:22:15,769 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:22:15,769 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:22:15,775 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:22:15,776 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:22:15" (1/1) ... [2023-11-29 02:22:15,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69026f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:15, skipping insertion in model container [2023-11-29 02:22:15,777 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:22:15" (1/1) ... [2023-11-29 02:22:15,835 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:22:16,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:22:16,164 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:22:16,214 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:22:16,255 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:22:16,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16 WrapperNode [2023-11-29 02:22:16,256 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:22:16,257 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:22:16,257 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:22:16,258 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:22:16,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (1/1) ... [2023-11-29 02:22:16,281 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (1/1) ... [2023-11-29 02:22:16,311 INFO L138 Inliner]: procedures = 171, calls = 27, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 99 [2023-11-29 02:22:16,311 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:22:16,312 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:22:16,312 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:22:16,313 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:22:16,323 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (1/1) ... [2023-11-29 02:22:16,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (1/1) ... [2023-11-29 02:22:16,327 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (1/1) ... [2023-11-29 02:22:16,345 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 7, 1]. 70 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 1 writes are split as follows [0, 0, 1]. [2023-11-29 02:22:16,345 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (1/1) ... [2023-11-29 02:22:16,345 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (1/1) ... [2023-11-29 02:22:16,354 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (1/1) ... [2023-11-29 02:22:16,359 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (1/1) ... [2023-11-29 02:22:16,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (1/1) ... [2023-11-29 02:22:16,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (1/1) ... [2023-11-29 02:22:16,368 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:22:16,369 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:22:16,370 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:22:16,370 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:22:16,371 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (1/1) ... [2023-11-29 02:22:16,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:22:16,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:16,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:22:16,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:22:16,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:22:16,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:22:16,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:22:16,450 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-29 02:22:16,450 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-29 02:22:16,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:22:16,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:22:16,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:22:16,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:22:16,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:22:16,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:22:16,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:22:16,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:22:16,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:22:16,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:22:16,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:22:16,454 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 02:22:16,595 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:22:16,597 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:22:16,829 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:22:16,971 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:22:16,971 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:22:16,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:22:16 BoogieIcfgContainer [2023-11-29 02:22:16,972 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:22:16,975 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:22:16,975 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:22:16,980 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:22:16,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:22:15" (1/3) ... [2023-11-29 02:22:16,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dfb3703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:22:16, skipping insertion in model container [2023-11-29 02:22:16,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:22:16" (2/3) ... [2023-11-29 02:22:16,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dfb3703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:22:16, skipping insertion in model container [2023-11-29 02:22:16,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:22:16" (3/3) ... [2023-11-29 02:22:16,983 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2023-11-29 02:22:16,998 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:22:16,998 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-29 02:22:16,998 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:22:17,034 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:22:17,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 33 transitions, 70 flow [2023-11-29 02:22:17,089 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2023-11-29 02:22:17,089 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:22:17,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 40 events. 4/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 98 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2023-11-29 02:22:17,092 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 33 transitions, 70 flow [2023-11-29 02:22:17,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 33 transitions, 70 flow [2023-11-29 02:22:17,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:22:17,116 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@26ed3d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:22:17,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-29 02:22:17,120 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:22:17,120 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 02:22:17,121 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:22:17,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:17,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:22:17,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-29 02:22:17,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:17,128 INFO L85 PathProgramCache]: Analyzing trace with hash 354424, now seen corresponding path program 1 times [2023-11-29 02:22:17,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:17,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136447790] [2023-11-29 02:22:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:17,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:17,398 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 02:22:17,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:17,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136447790] [2023-11-29 02:22:17,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136447790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:17,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:17,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:22:17,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127666743] [2023-11-29 02:22:17,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:17,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:22:17,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:17,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:22:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:22:17,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2023-11-29 02:22:17,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:17,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:17,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2023-11-29 02:22:17,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:17,542 INFO L124 PetriNetUnfolderBase]: 35/113 cut-off events. [2023-11-29 02:22:17,543 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:22:17,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 113 events. 35/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 387 event pairs, 27 based on Foata normal form. 8/113 useless extension candidates. Maximal degree in co-relation 177. Up to 74 conditions per place. [2023-11-29 02:22:17,547 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 14 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-29 02:22:17,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 86 flow [2023-11-29 02:22:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:22:17,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:22:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-29 02:22:17,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-29 02:22:17,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-29 02:22:17,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-29 02:22:17,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:17,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-29 02:22:17,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:17,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:17,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:17,579 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 70 flow. Second operand 3 states and 55 transitions. [2023-11-29 02:22:17,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 86 flow [2023-11-29 02:22:17,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 02:22:17,586 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 58 flow [2023-11-29 02:22:17,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-11-29 02:22:17,592 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-11-29 02:22:17,592 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 58 flow [2023-11-29 02:22:17,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:17,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:17,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:22:17,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:22:17,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-29 02:22:17,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash 354425, now seen corresponding path program 1 times [2023-11-29 02:22:17,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:17,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434076671] [2023-11-29 02:22:17,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:17,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:17,734 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 02:22:17,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:17,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434076671] [2023-11-29 02:22:17,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434076671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:17,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:17,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:22:17,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825792420] [2023-11-29 02:22:17,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:17,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:22:17,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:22:17,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:22:17,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 33 [2023-11-29 02:22:17,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:17,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:17,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 33 [2023-11-29 02:22:17,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:17,823 INFO L124 PetriNetUnfolderBase]: 24/83 cut-off events. [2023-11-29 02:22:17,824 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 02:22:17,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 83 events. 24/83 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 248 event pairs, 18 based on Foata normal form. 11/88 useless extension candidates. Maximal degree in co-relation 136. Up to 53 conditions per place. [2023-11-29 02:22:17,826 INFO L140 encePairwiseOnDemand]: 31/33 looper letters, 13 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-29 02:22:17,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 84 flow [2023-11-29 02:22:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:22:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:22:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2023-11-29 02:22:17,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2023-11-29 02:22:17,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 54 transitions. [2023-11-29 02:22:17,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 54 transitions. [2023-11-29 02:22:17,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:17,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 54 transitions. [2023-11-29 02:22:17,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:17,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:17,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:17,832 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 58 flow. Second operand 3 states and 54 transitions. [2023-11-29 02:22:17,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 84 flow [2023-11-29 02:22:17,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 83 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:22:17,834 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 57 flow [2023-11-29 02:22:17,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-11-29 02:22:17,835 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-11-29 02:22:17,835 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 57 flow [2023-11-29 02:22:17,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:17,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:17,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:17,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:22:17,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-29 02:22:17,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:17,837 INFO L85 PathProgramCache]: Analyzing trace with hash 910382050, now seen corresponding path program 1 times [2023-11-29 02:22:17,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:17,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542053607] [2023-11-29 02:22:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:17,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:18,005 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 02:22:18,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:18,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542053607] [2023-11-29 02:22:18,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542053607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:18,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:18,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:22:18,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081593931] [2023-11-29 02:22:18,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:18,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:22:18,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:18,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:22:18,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:22:18,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2023-11-29 02:22:18,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:18,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:18,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2023-11-29 02:22:18,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:18,102 INFO L124 PetriNetUnfolderBase]: 35/107 cut-off events. [2023-11-29 02:22:18,102 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:22:18,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 107 events. 35/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 341 event pairs, 27 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 181. Up to 74 conditions per place. [2023-11-29 02:22:18,104 INFO L140 encePairwiseOnDemand]: 31/33 looper letters, 14 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-11-29 02:22:18,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 24 transitions, 85 flow [2023-11-29 02:22:18,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:22:18,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:22:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2023-11-29 02:22:18,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252525252525253 [2023-11-29 02:22:18,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 52 transitions. [2023-11-29 02:22:18,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 52 transitions. [2023-11-29 02:22:18,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:18,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 52 transitions. [2023-11-29 02:22:18,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:18,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:18,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:18,109 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 57 flow. Second operand 3 states and 52 transitions. [2023-11-29 02:22:18,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 24 transitions, 85 flow [2023-11-29 02:22:18,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 24 transitions, 84 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:22:18,111 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 56 flow [2023-11-29 02:22:18,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-11-29 02:22:18,113 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-11-29 02:22:18,113 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 56 flow [2023-11-29 02:22:18,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:18,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:18,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:18,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:22:18,114 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-29 02:22:18,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:18,115 INFO L85 PathProgramCache]: Analyzing trace with hash 910382051, now seen corresponding path program 1 times [2023-11-29 02:22:18,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:18,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019982334] [2023-11-29 02:22:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:18,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:18,365 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 02:22:18,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:18,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019982334] [2023-11-29 02:22:18,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019982334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:18,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:18,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:22:18,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332481898] [2023-11-29 02:22:18,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:18,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:22:18,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:18,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:22:18,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:22:18,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 33 [2023-11-29 02:22:18,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 56 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:18,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:18,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 33 [2023-11-29 02:22:18,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:18,549 INFO L124 PetriNetUnfolderBase]: 27/116 cut-off events. [2023-11-29 02:22:18,549 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 02:22:18,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 116 events. 27/116 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 402 event pairs, 18 based on Foata normal form. 3/113 useless extension candidates. Maximal degree in co-relation 184. Up to 53 conditions per place. [2023-11-29 02:22:18,551 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 16 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-11-29 02:22:18,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 110 flow [2023-11-29 02:22:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:22:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:22:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2023-11-29 02:22:18,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-29 02:22:18,553 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 88 transitions. [2023-11-29 02:22:18,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 88 transitions. [2023-11-29 02:22:18,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:18,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 88 transitions. [2023-11-29 02:22:18,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:18,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:18,557 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:18,557 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 56 flow. Second operand 5 states and 88 transitions. [2023-11-29 02:22:18,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 110 flow [2023-11-29 02:22:18,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:22:18,559 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 82 flow [2023-11-29 02:22:18,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-11-29 02:22:18,560 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-11-29 02:22:18,560 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 82 flow [2023-11-29 02:22:18,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:18,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:18,561 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-29 02:22:18,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:22:18,561 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-29 02:22:18,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1843885970, now seen corresponding path program 1 times [2023-11-29 02:22:18,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:18,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237625250] [2023-11-29 02:22:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:18,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:22:18,600 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:22:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:22:18,631 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:22:18,631 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:22:18,633 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-29 02:22:18,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-11-29 02:22:18,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-29 02:22:18,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2023-11-29 02:22:18,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-29 02:22:18,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-11-29 02:22:18,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-29 02:22:18,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2023-11-29 02:22:18,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2023-11-29 02:22:18,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-29 02:22:18,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:22:18,639 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-29 02:22:18,642 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 02:22:18,643 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 02:22:18,681 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:22:18,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 56 transitions, 122 flow [2023-11-29 02:22:18,699 INFO L124 PetriNetUnfolderBase]: 8/71 cut-off events. [2023-11-29 02:22:18,700 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:22:18,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 71 events. 8/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 221 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 52. Up to 3 conditions per place. [2023-11-29 02:22:18,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 56 transitions, 122 flow [2023-11-29 02:22:18,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 56 transitions, 122 flow [2023-11-29 02:22:18,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:22:18,706 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@26ed3d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:22:18,706 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-29 02:22:18,709 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:22:18,709 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 02:22:18,709 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:22:18,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:18,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:22:18,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-29 02:22:18,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:18,710 INFO L85 PathProgramCache]: Analyzing trace with hash 410032, now seen corresponding path program 1 times [2023-11-29 02:22:18,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:18,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8374696] [2023-11-29 02:22:18,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:18,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:18,754 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 02:22:18,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:18,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8374696] [2023-11-29 02:22:18,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8374696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:18,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:18,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:22:18,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216225127] [2023-11-29 02:22:18,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:18,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:22:18,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:18,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:22:18,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:22:18,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2023-11-29 02:22:18,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 56 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:18,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:18,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2023-11-29 02:22:18,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:19,058 INFO L124 PetriNetUnfolderBase]: 766/1598 cut-off events. [2023-11-29 02:22:19,058 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-11-29 02:22:19,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 1598 events. 766/1598 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9548 event pairs, 657 based on Foata normal form. 253/1757 useless extension candidates. Maximal degree in co-relation 1473. Up to 1184 conditions per place. [2023-11-29 02:22:19,075 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 25 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-29 02:22:19,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 154 flow [2023-11-29 02:22:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:22:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:22:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2023-11-29 02:22:19,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2023-11-29 02:22:19,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2023-11-29 02:22:19,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2023-11-29 02:22:19,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:19,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2023-11-29 02:22:19,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,081 INFO L175 Difference]: Start difference. First operand has 53 places, 56 transitions, 122 flow. Second operand 3 states and 95 transitions. [2023-11-29 02:22:19,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 154 flow [2023-11-29 02:22:19,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 154 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 02:22:19,083 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 104 flow [2023-11-29 02:22:19,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-29 02:22:19,084 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -4 predicate places. [2023-11-29 02:22:19,084 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 104 flow [2023-11-29 02:22:19,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:19,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:22:19,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 02:22:19,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-29 02:22:19,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash 410033, now seen corresponding path program 1 times [2023-11-29 02:22:19,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:19,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236219719] [2023-11-29 02:22:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:19,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:19,133 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 02:22:19,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:19,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236219719] [2023-11-29 02:22:19,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236219719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:19,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:19,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:22:19,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356321244] [2023-11-29 02:22:19,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:19,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:22:19,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:22:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:22:19,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2023-11-29 02:22:19,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:19,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2023-11-29 02:22:19,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:19,337 INFO L124 PetriNetUnfolderBase]: 550/1174 cut-off events. [2023-11-29 02:22:19,337 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-29 02:22:19,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 1174 events. 550/1174 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 6655 event pairs, 468 based on Foata normal form. 111/1214 useless extension candidates. Maximal degree in co-relation 2067. Up to 863 conditions per place. [2023-11-29 02:22:19,348 INFO L140 encePairwiseOnDemand]: 54/56 looper letters, 24 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-29 02:22:19,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 45 transitions, 152 flow [2023-11-29 02:22:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:22:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:22:19,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-29 02:22:19,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-29 02:22:19,350 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-29 02:22:19,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-29 02:22:19,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:19,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-29 02:22:19,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,353 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 104 flow. Second operand 3 states and 92 transitions. [2023-11-29 02:22:19,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 45 transitions, 152 flow [2023-11-29 02:22:19,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 45 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:22:19,355 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 103 flow [2023-11-29 02:22:19,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-29 02:22:19,356 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -4 predicate places. [2023-11-29 02:22:19,356 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 103 flow [2023-11-29 02:22:19,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:19,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:19,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 02:22:19,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-29 02:22:19,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:19,357 INFO L85 PathProgramCache]: Analyzing trace with hash 728331418, now seen corresponding path program 1 times [2023-11-29 02:22:19,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:19,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546817762] [2023-11-29 02:22:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:19,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:19,445 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 02:22:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:19,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546817762] [2023-11-29 02:22:19,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546817762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:19,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:19,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:22:19,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313997349] [2023-11-29 02:22:19,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:19,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:22:19,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:19,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:22:19,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:22:19,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2023-11-29 02:22:19,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:19,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2023-11-29 02:22:19,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:19,742 INFO L124 PetriNetUnfolderBase]: 766/1564 cut-off events. [2023-11-29 02:22:19,742 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-11-29 02:22:19,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2787 conditions, 1564 events. 766/1564 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 9125 event pairs, 657 based on Foata normal form. 0/1495 useless extension candidates. Maximal degree in co-relation 2778. Up to 1184 conditions per place. [2023-11-29 02:22:19,758 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 25 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-29 02:22:19,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 151 flow [2023-11-29 02:22:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:22:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:22:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-29 02:22:19,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2023-11-29 02:22:19,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-29 02:22:19,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-29 02:22:19,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:19,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-29 02:22:19,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,763 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 103 flow. Second operand 3 states and 88 transitions. [2023-11-29 02:22:19,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 151 flow [2023-11-29 02:22:19,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:22:19,765 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 100 flow [2023-11-29 02:22:19,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-11-29 02:22:19,766 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2023-11-29 02:22:19,766 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 100 flow [2023-11-29 02:22:19,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:19,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:19,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:19,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 02:22:19,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-29 02:22:19,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:19,768 INFO L85 PathProgramCache]: Analyzing trace with hash 728331419, now seen corresponding path program 1 times [2023-11-29 02:22:19,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:19,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619382093] [2023-11-29 02:22:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:19,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:19,974 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 02:22:19,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:19,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619382093] [2023-11-29 02:22:19,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619382093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:19,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:19,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:22:19,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032201643] [2023-11-29 02:22:19,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:19,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:22:19,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:19,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:22:19,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:22:20,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2023-11-29 02:22:20,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:20,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:20,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2023-11-29 02:22:20,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:20,406 INFO L124 PetriNetUnfolderBase]: 693/1717 cut-off events. [2023-11-29 02:22:20,407 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-29 02:22:20,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2887 conditions, 1717 events. 693/1717 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 12062 event pairs, 444 based on Foata normal form. 33/1659 useless extension candidates. Maximal degree in co-relation 2877. Up to 863 conditions per place. [2023-11-29 02:22:20,422 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 49 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2023-11-29 02:22:20,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 274 flow [2023-11-29 02:22:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:22:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:22:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2023-11-29 02:22:20,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2023-11-29 02:22:20,425 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 166 transitions. [2023-11-29 02:22:20,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 166 transitions. [2023-11-29 02:22:20,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:20,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 166 transitions. [2023-11-29 02:22:20,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:20,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:20,428 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:20,429 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 100 flow. Second operand 5 states and 166 transitions. [2023-11-29 02:22:20,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 274 flow [2023-11-29 02:22:20,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:22:20,432 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 126 flow [2023-11-29 02:22:20,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-11-29 02:22:20,433 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2023-11-29 02:22:20,434 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 126 flow [2023-11-29 02:22:20,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:20,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:20,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:20,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 02:22:20,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-29 02:22:20,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:20,436 INFO L85 PathProgramCache]: Analyzing trace with hash -453034298, now seen corresponding path program 1 times [2023-11-29 02:22:20,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:20,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367971700] [2023-11-29 02:22:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:20,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:20,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:20,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367971700] [2023-11-29 02:22:20,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367971700] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:20,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878913981] [2023-11-29 02:22:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:20,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:20,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:20,688 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:20,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:22:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:20,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:22:20,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:22:20,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:22:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:21,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:22:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:21,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878913981] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:22:21,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:22:21,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-29 02:22:21,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376417440] [2023-11-29 02:22:21,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:22:21,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:22:21,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:21,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:22:21,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:22:21,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2023-11-29 02:22:21,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 126 flow. Second operand has 11 states, 11 states have (on average 23.90909090909091) internal successors, (263), 11 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:21,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:21,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2023-11-29 02:22:21,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:22,050 INFO L124 PetriNetUnfolderBase]: 1150/2731 cut-off events. [2023-11-29 02:22:22,050 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2023-11-29 02:22:22,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5111 conditions, 2731 events. 1150/2731 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 20404 event pairs, 417 based on Foata normal form. 33/2680 useless extension candidates. Maximal degree in co-relation 5098. Up to 896 conditions per place. [2023-11-29 02:22:22,075 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 69 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2023-11-29 02:22:22,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 397 flow [2023-11-29 02:22:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:22:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:22:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2023-11-29 02:22:22,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2023-11-29 02:22:22,077 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 209 transitions. [2023-11-29 02:22:22,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 209 transitions. [2023-11-29 02:22:22,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:22,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 209 transitions. [2023-11-29 02:22:22,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:22,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:22,080 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:22,080 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 126 flow. Second operand 6 states and 209 transitions. [2023-11-29 02:22:22,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 397 flow [2023-11-29 02:22:22,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:22:22,085 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 166 flow [2023-11-29 02:22:22,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2023-11-29 02:22:22,086 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2023-11-29 02:22:22,086 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 166 flow [2023-11-29 02:22:22,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.90909090909091) internal successors, (263), 11 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:22,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:22,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:22,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:22:22,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:22:22,288 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-29 02:22:22,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:22,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1640232552, now seen corresponding path program 1 times [2023-11-29 02:22:22,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:22,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193815219] [2023-11-29 02:22:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:22,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:22:22,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:22,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193815219] [2023-11-29 02:22:22,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193815219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:22,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444080214] [2023-11-29 02:22:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:22,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:22,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:22,502 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:22,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:22:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:22,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:22:22,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:22,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:22:22,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:22:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:22:22,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:22:22,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444080214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:22,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:22:22,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-11-29 02:22:22,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38440942] [2023-11-29 02:22:22,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:22,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:22:22,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:22,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:22:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:22:22,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2023-11-29 02:22:22,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:22,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:22,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2023-11-29 02:22:22,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:23,453 INFO L124 PetriNetUnfolderBase]: 2156/4415 cut-off events. [2023-11-29 02:22:23,454 INFO L125 PetriNetUnfolderBase]: For 2648/2684 co-relation queries the response was YES. [2023-11-29 02:22:23,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9310 conditions, 4415 events. 2156/4415 cut-off events. For 2648/2684 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 32394 event pairs, 1065 based on Foata normal form. 0/4184 useless extension candidates. Maximal degree in co-relation 9294. Up to 1979 conditions per place. [2023-11-29 02:22:23,497 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 53 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2023-11-29 02:22:23,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 380 flow [2023-11-29 02:22:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:22:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:22:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2023-11-29 02:22:23,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2023-11-29 02:22:23,500 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 136 transitions. [2023-11-29 02:22:23,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 136 transitions. [2023-11-29 02:22:23,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:23,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 136 transitions. [2023-11-29 02:22:23,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:23,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:23,502 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:23,502 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 166 flow. Second operand 4 states and 136 transitions. [2023-11-29 02:22:23,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 380 flow [2023-11-29 02:22:23,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 375 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:22:23,508 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 184 flow [2023-11-29 02:22:23,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-11-29 02:22:23,509 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2023-11-29 02:22:23,510 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 184 flow [2023-11-29 02:22:23,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:23,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:23,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:23,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:22:23,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:22:23,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-29 02:22:23,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:23,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1159181790, now seen corresponding path program 1 times [2023-11-29 02:22:23,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:23,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720778136] [2023-11-29 02:22:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:23,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:23,764 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 02:22:23,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:23,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720778136] [2023-11-29 02:22:23,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720778136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:23,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:23,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:22:23,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325473988] [2023-11-29 02:22:23,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:23,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:22:23,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:23,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:22:23,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:22:23,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2023-11-29 02:22:23,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:23,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:23,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2023-11-29 02:22:23,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:24,169 INFO L124 PetriNetUnfolderBase]: 1996/4006 cut-off events. [2023-11-29 02:22:24,170 INFO L125 PetriNetUnfolderBase]: For 1353/1353 co-relation queries the response was YES. [2023-11-29 02:22:24,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9115 conditions, 4006 events. 1996/4006 cut-off events. For 1353/1353 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 28285 event pairs, 214 based on Foata normal form. 171/4045 useless extension candidates. Maximal degree in co-relation 9097. Up to 2658 conditions per place. [2023-11-29 02:22:24,200 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 44 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-11-29 02:22:24,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 324 flow [2023-11-29 02:22:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:22:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:22:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2023-11-29 02:22:24,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2023-11-29 02:22:24,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 106 transitions. [2023-11-29 02:22:24,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 106 transitions. [2023-11-29 02:22:24,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:24,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 106 transitions. [2023-11-29 02:22:24,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:24,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:24,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:24,203 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 184 flow. Second operand 3 states and 106 transitions. [2023-11-29 02:22:24,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 324 flow [2023-11-29 02:22:24,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:22:24,209 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 183 flow [2023-11-29 02:22:24,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2023-11-29 02:22:24,210 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2023-11-29 02:22:24,211 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 183 flow [2023-11-29 02:22:24,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:24,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:24,211 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-29 02:22:24,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 02:22:24,211 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-29 02:22:24,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:24,212 INFO L85 PathProgramCache]: Analyzing trace with hash -693356841, now seen corresponding path program 1 times [2023-11-29 02:22:24,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:24,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216138579] [2023-11-29 02:22:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:24,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:22:24,226 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:22:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:22:24,241 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:22:24,241 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:22:24,242 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-11-29 02:22:24,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-11-29 02:22:24,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-11-29 02:22:24,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2023-11-29 02:22:24,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-11-29 02:22:24,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-11-29 02:22:24,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2023-11-29 02:22:24,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-11-29 02:22:24,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2023-11-29 02:22:24,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2023-11-29 02:22:24,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2023-11-29 02:22:24,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2023-11-29 02:22:24,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2023-11-29 02:22:24,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 02:22:24,245 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:24,246 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 02:22:24,247 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 02:22:24,289 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:22:24,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 79 transitions, 176 flow [2023-11-29 02:22:24,302 INFO L124 PetriNetUnfolderBase]: 12/102 cut-off events. [2023-11-29 02:22:24,302 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 02:22:24,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 102 events. 12/102 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 353 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-29 02:22:24,302 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 79 transitions, 176 flow [2023-11-29 02:22:24,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 79 transitions, 176 flow [2023-11-29 02:22:24,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:22:24,306 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@26ed3d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:22:24,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-29 02:22:24,308 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:22:24,308 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 02:22:24,308 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:22:24,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:24,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:22:24,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-29 02:22:24,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:24,309 INFO L85 PathProgramCache]: Analyzing trace with hash 488479, now seen corresponding path program 1 times [2023-11-29 02:22:24,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:24,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414501608] [2023-11-29 02:22:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:24,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:24,330 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 02:22:24,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:24,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414501608] [2023-11-29 02:22:24,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414501608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:24,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:24,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:22:24,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27641257] [2023-11-29 02:22:24,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:24,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:22:24,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:22:24,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:22:24,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 79 [2023-11-29 02:22:24,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:24,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:24,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 79 [2023-11-29 02:22:24,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:26,270 INFO L124 PetriNetUnfolderBase]: 12082/20447 cut-off events. [2023-11-29 02:22:26,271 INFO L125 PetriNetUnfolderBase]: For 744/744 co-relation queries the response was YES. [2023-11-29 02:22:26,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37168 conditions, 20447 events. 12082/20447 cut-off events. For 744/744 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 154669 event pairs, 10557 based on Foata normal form. 4208/23685 useless extension candidates. Maximal degree in co-relation 3393. Up to 16284 conditions per place. [2023-11-29 02:22:26,400 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 36 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-11-29 02:22:26,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 224 flow [2023-11-29 02:22:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:22:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:22:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-29 02:22:26,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569620253164557 [2023-11-29 02:22:26,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-29 02:22:26,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-29 02:22:26,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:26,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-29 02:22:26,403 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 02:22:26,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:26,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:26,405 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 176 flow. Second operand 3 states and 135 transitions. [2023-11-29 02:22:26,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 224 flow [2023-11-29 02:22:26,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 222 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 02:22:26,409 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 150 flow [2023-11-29 02:22:26,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2023-11-29 02:22:26,410 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2023-11-29 02:22:26,411 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 150 flow [2023-11-29 02:22:26,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:26,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:26,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:22:26,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 02:22:26,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-29 02:22:26,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:26,413 INFO L85 PathProgramCache]: Analyzing trace with hash 488480, now seen corresponding path program 1 times [2023-11-29 02:22:26,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:26,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718344961] [2023-11-29 02:22:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:26,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:26,463 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 02:22:26,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:26,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718344961] [2023-11-29 02:22:26,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718344961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:26,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:26,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:22:26,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358428821] [2023-11-29 02:22:26,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:26,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:22:26,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:26,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:22:26,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:22:26,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 02:22:26,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:26,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:26,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 02:22:26,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:27,822 INFO L124 PetriNetUnfolderBase]: 8830/15157 cut-off events. [2023-11-29 02:22:27,822 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2023-11-29 02:22:27,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27459 conditions, 15157 events. 8830/15157 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 111330 event pairs, 7668 based on Foata normal form. 1111/15504 useless extension candidates. Maximal degree in co-relation 27450. Up to 11963 conditions per place. [2023-11-29 02:22:27,902 INFO L140 encePairwiseOnDemand]: 77/79 looper letters, 35 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-11-29 02:22:27,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 220 flow [2023-11-29 02:22:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:22:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:22:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2023-11-29 02:22:27,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5485232067510548 [2023-11-29 02:22:27,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 130 transitions. [2023-11-29 02:22:27,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 130 transitions. [2023-11-29 02:22:27,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:27,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 130 transitions. [2023-11-29 02:22:27,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:27,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:27,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:27,906 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 150 flow. Second operand 3 states and 130 transitions. [2023-11-29 02:22:27,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 220 flow [2023-11-29 02:22:27,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:22:27,908 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 149 flow [2023-11-29 02:22:27,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2023-11-29 02:22:27,909 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2023-11-29 02:22:27,910 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 149 flow [2023-11-29 02:22:27,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:27,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:27,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:27,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 02:22:27,911 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-29 02:22:27,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:27,911 INFO L85 PathProgramCache]: Analyzing trace with hash 164426611, now seen corresponding path program 1 times [2023-11-29 02:22:27,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:27,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304114586] [2023-11-29 02:22:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:27,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:28,044 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 02:22:28,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:28,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304114586] [2023-11-29 02:22:28,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304114586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:28,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:28,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:22:28,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454800963] [2023-11-29 02:22:28,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:28,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:22:28,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:28,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:22:28,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:22:28,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 79 [2023-11-29 02:22:28,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:28,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:28,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 79 [2023-11-29 02:22:28,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:29,957 INFO L124 PetriNetUnfolderBase]: 12082/20152 cut-off events. [2023-11-29 02:22:29,957 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2023-11-29 02:22:29,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36776 conditions, 20152 events. 12082/20152 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 149153 event pairs, 10557 based on Foata normal form. 0/19423 useless extension candidates. Maximal degree in co-relation 36766. Up to 16284 conditions per place. [2023-11-29 02:22:30,059 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 36 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-11-29 02:22:30,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 217 flow [2023-11-29 02:22:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:22:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:22:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2023-11-29 02:22:30,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232067510548524 [2023-11-29 02:22:30,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 124 transitions. [2023-11-29 02:22:30,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 124 transitions. [2023-11-29 02:22:30,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:30,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 124 transitions. [2023-11-29 02:22:30,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:30,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:30,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:30,064 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 149 flow. Second operand 3 states and 124 transitions. [2023-11-29 02:22:30,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 217 flow [2023-11-29 02:22:30,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 62 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:22:30,067 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 144 flow [2023-11-29 02:22:30,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-11-29 02:22:30,068 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-11-29 02:22:30,068 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 144 flow [2023-11-29 02:22:30,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:30,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:30,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:30,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 02:22:30,069 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-29 02:22:30,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:30,070 INFO L85 PathProgramCache]: Analyzing trace with hash 164426612, now seen corresponding path program 1 times [2023-11-29 02:22:30,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:30,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071539018] [2023-11-29 02:22:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:30,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:30,228 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 02:22:30,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:30,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071539018] [2023-11-29 02:22:30,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071539018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:30,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:30,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:22:30,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000099122] [2023-11-29 02:22:30,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:30,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:22:30,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:30,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:22:30,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:22:30,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 02:22:30,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:30,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:30,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 02:22:30,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:32,191 INFO L124 PetriNetUnfolderBase]: 11244/21334 cut-off events. [2023-11-29 02:22:32,191 INFO L125 PetriNetUnfolderBase]: For 439/439 co-relation queries the response was YES. [2023-11-29 02:22:32,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37325 conditions, 21334 events. 11244/21334 cut-off events. For 439/439 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 187802 event pairs, 6690 based on Foata normal form. 333/20664 useless extension candidates. Maximal degree in co-relation 37314. Up to 11963 conditions per place. [2023-11-29 02:22:32,329 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 82 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2023-11-29 02:22:32,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 438 flow [2023-11-29 02:22:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:22:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:22:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2023-11-29 02:22:32,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177215189873417 [2023-11-29 02:22:32,331 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 244 transitions. [2023-11-29 02:22:32,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 244 transitions. [2023-11-29 02:22:32,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:32,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 244 transitions. [2023-11-29 02:22:32,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:32,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:32,334 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:32,335 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 144 flow. Second operand 5 states and 244 transitions. [2023-11-29 02:22:32,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 438 flow [2023-11-29 02:22:32,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 112 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:22:32,338 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 170 flow [2023-11-29 02:22:32,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2023-11-29 02:22:32,339 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2023-11-29 02:22:32,339 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 170 flow [2023-11-29 02:22:32,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:32,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:32,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:32,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 02:22:32,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-29 02:22:32,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:32,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2123966532, now seen corresponding path program 1 times [2023-11-29 02:22:32,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:32,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297844488] [2023-11-29 02:22:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:32,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:32,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:32,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297844488] [2023-11-29 02:22:32,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297844488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:32,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895818540] [2023-11-29 02:22:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:32,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:32,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:32,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:32,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:22:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:32,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:22:32,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:32,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:22:32,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:22:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:32,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:22:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:33,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895818540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:22:33,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:22:33,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-11-29 02:22:33,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041213871] [2023-11-29 02:22:33,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:22:33,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:22:33,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:33,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:22:33,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:22:33,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 02:22:33,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 170 flow. Second operand has 12 states, 12 states have (on average 32.833333333333336) internal successors, (394), 12 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:33,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:33,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 02:22:33,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:36,430 INFO L124 PetriNetUnfolderBase]: 18571/35049 cut-off events. [2023-11-29 02:22:36,431 INFO L125 PetriNetUnfolderBase]: For 3700/3700 co-relation queries the response was YES. [2023-11-29 02:22:36,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65870 conditions, 35049 events. 18571/35049 cut-off events. For 3700/3700 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 330952 event pairs, 7668 based on Foata normal form. 333/34399 useless extension candidates. Maximal degree in co-relation 65856. Up to 12296 conditions per place. [2023-11-29 02:22:36,625 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 113 selfloop transitions, 7 changer transitions 0/145 dead transitions. [2023-11-29 02:22:36,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 145 transitions, 610 flow [2023-11-29 02:22:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:22:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:22:36,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 307 transitions. [2023-11-29 02:22:36,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476793248945147 [2023-11-29 02:22:36,628 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 307 transitions. [2023-11-29 02:22:36,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 307 transitions. [2023-11-29 02:22:36,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:36,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 307 transitions. [2023-11-29 02:22:36,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 51.166666666666664) internal successors, (307), 6 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:36,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:36,631 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:36,632 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 170 flow. Second operand 6 states and 307 transitions. [2023-11-29 02:22:36,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 145 transitions, 610 flow [2023-11-29 02:22:36,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 145 transitions, 609 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:22:36,640 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 210 flow [2023-11-29 02:22:36,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2023-11-29 02:22:36,641 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2023-11-29 02:22:36,641 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 210 flow [2023-11-29 02:22:36,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.833333333333336) internal successors, (394), 12 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:36,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:36,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:36,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:22:36,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:22:36,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-29 02:22:36,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:36,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1381640023, now seen corresponding path program 1 times [2023-11-29 02:22:36,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:36,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619210678] [2023-11-29 02:22:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:36,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:22:36,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:36,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619210678] [2023-11-29 02:22:36,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619210678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:36,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837551793] [2023-11-29 02:22:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:36,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:36,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:37,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:37,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:22:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:37,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:22:37,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:37,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:22:37,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:22:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:22:37,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:22:37,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837551793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:37,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:22:37,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-11-29 02:22:37,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632241115] [2023-11-29 02:22:37,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:37,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:22:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:37,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:22:37,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:22:37,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 02:22:37,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:37,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:37,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 02:22:37,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:43,175 INFO L124 PetriNetUnfolderBase]: 34946/58731 cut-off events. [2023-11-29 02:22:43,175 INFO L125 PetriNetUnfolderBase]: For 31354/31924 co-relation queries the response was YES. [2023-11-29 02:22:43,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122397 conditions, 58731 events. 34946/58731 cut-off events. For 31354/31924 co-relation queries the response was YES. Maximal size of possible extension queue 1944. Compared 517739 event pairs, 17295 based on Foata normal form. 0/55980 useless extension candidates. Maximal degree in co-relation 122380. Up to 27329 conditions per place. [2023-11-29 02:22:43,683 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 75 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2023-11-29 02:22:43,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 104 transitions, 495 flow [2023-11-29 02:22:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:22:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:22:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 194 transitions. [2023-11-29 02:22:43,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139240506329114 [2023-11-29 02:22:43,686 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 194 transitions. [2023-11-29 02:22:43,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 194 transitions. [2023-11-29 02:22:43,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:43,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 194 transitions. [2023-11-29 02:22:43,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:43,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:43,689 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:43,689 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 210 flow. Second operand 4 states and 194 transitions. [2023-11-29 02:22:43,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 104 transitions, 495 flow [2023-11-29 02:22:43,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 104 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:22:43,714 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 228 flow [2023-11-29 02:22:43,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2023-11-29 02:22:43,715 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2023-11-29 02:22:43,715 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 228 flow [2023-11-29 02:22:43,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:43,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:43,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:43,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:22:43,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:43,917 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-29 02:22:43,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:43,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1418473413, now seen corresponding path program 1 times [2023-11-29 02:22:43,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:43,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422498551] [2023-11-29 02:22:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:43,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:43,969 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 02:22:43,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:43,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422498551] [2023-11-29 02:22:43,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422498551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:43,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:22:43,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:22:43,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883641649] [2023-11-29 02:22:43,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:43,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:22:43,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:43,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:22:43,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:22:43,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 02:22:43,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:43,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:43,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 02:22:43,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:49,555 INFO L124 PetriNetUnfolderBase]: 32413/53642 cut-off events. [2023-11-29 02:22:49,556 INFO L125 PetriNetUnfolderBase]: For 15185/15185 co-relation queries the response was YES. [2023-11-29 02:22:49,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119181 conditions, 53642 events. 32413/53642 cut-off events. For 15185/15185 co-relation queries the response was YES. Maximal size of possible extension queue 1677. Compared 459867 event pairs, 3796 based on Foata normal form. 1791/53951 useless extension candidates. Maximal degree in co-relation 119162. Up to 37674 conditions per place. [2023-11-29 02:22:49,950 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 66 selfloop transitions, 3 changer transitions 0/94 dead transitions. [2023-11-29 02:22:49,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 94 transitions, 439 flow [2023-11-29 02:22:49,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:22:49,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:22:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-11-29 02:22:49,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6540084388185654 [2023-11-29 02:22:49,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-11-29 02:22:49,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-11-29 02:22:49,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:49,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-11-29 02:22:49,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:49,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:49,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:49,955 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 228 flow. Second operand 3 states and 155 transitions. [2023-11-29 02:22:49,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 94 transitions, 439 flow [2023-11-29 02:22:50,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 431 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:22:50,045 INFO L231 Difference]: Finished difference. Result has 80 places, 68 transitions, 227 flow [2023-11-29 02:22:50,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=80, PETRI_TRANSITIONS=68} [2023-11-29 02:22:50,046 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2023-11-29 02:22:50,046 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 227 flow [2023-11-29 02:22:50,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:50,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:50,047 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:50,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 02:22:50,047 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-29 02:22:50,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1628230028, now seen corresponding path program 2 times [2023-11-29 02:22:50,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:50,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849640722] [2023-11-29 02:22:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:50,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:50,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:50,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849640722] [2023-11-29 02:22:50,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849640722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:50,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875072003] [2023-11-29 02:22:50,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:22:50,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:50,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:50,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:22:50,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:22:50,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:22:50,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:22:50,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:22:50,258 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:22:50,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875072003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:22:50,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:22:50,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-11-29 02:22:50,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758957532] [2023-11-29 02:22:50,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:22:50,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:22:50,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:50,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:22:50,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:22:50,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 02:22:50,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 68 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:50,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:50,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 02:22:50,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:22:55,763 INFO L124 PetriNetUnfolderBase]: 33310/54119 cut-off events. [2023-11-29 02:22:55,763 INFO L125 PetriNetUnfolderBase]: For 14199/14199 co-relation queries the response was YES. [2023-11-29 02:22:55,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117230 conditions, 54119 events. 33310/54119 cut-off events. For 14199/14199 co-relation queries the response was YES. Maximal size of possible extension queue 1545. Compared 451799 event pairs, 2605 based on Foata normal form. 597/53327 useless extension candidates. Maximal degree in co-relation 117212. Up to 28353 conditions per place. [2023-11-29 02:22:56,400 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 116 selfloop transitions, 6 changer transitions 0/145 dead transitions. [2023-11-29 02:22:56,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 145 transitions, 671 flow [2023-11-29 02:22:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:22:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:22:56,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 269 transitions. [2023-11-29 02:22:56,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6810126582278481 [2023-11-29 02:22:56,402 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 269 transitions. [2023-11-29 02:22:56,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 269 transitions. [2023-11-29 02:22:56,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:22:56,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 269 transitions. [2023-11-29 02:22:56,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:56,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:56,405 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:56,405 INFO L175 Difference]: Start difference. First operand has 80 places, 68 transitions, 227 flow. Second operand 5 states and 269 transitions. [2023-11-29 02:22:56,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 145 transitions, 671 flow [2023-11-29 02:22:56,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 145 transitions, 662 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 02:22:56,470 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 223 flow [2023-11-29 02:22:56,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2023-11-29 02:22:56,470 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 8 predicate places. [2023-11-29 02:22:56,470 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 223 flow [2023-11-29 02:22:56,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:56,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:22:56,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:22:56,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:22:56,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 02:22:56,672 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-29 02:22:56,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:22:56,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1766869583, now seen corresponding path program 1 times [2023-11-29 02:22:56,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:22:56,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562075757] [2023-11-29 02:22:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:56,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:22:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:22:56,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:22:56,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562075757] [2023-11-29 02:22:56,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562075757] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:22:56,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769549853] [2023-11-29 02:22:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:22:56,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:22:56,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:22:56,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:22:56,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:22:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:22:56,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:22:56,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:22:57,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:22:57,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:22:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:22:57,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:22:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:22:57,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769549853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:22:57,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:22:57,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-11-29 02:22:57,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808250478] [2023-11-29 02:22:57,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:22:57,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:22:57,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:22:57,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:22:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:22:57,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 02:22:57,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 223 flow. Second operand has 12 states, 12 states have (on average 33.25) internal successors, (399), 12 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:22:57,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:22:57,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 02:22:57,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:23:03,644 INFO L124 PetriNetUnfolderBase]: 35794/63884 cut-off events. [2023-11-29 02:23:03,644 INFO L125 PetriNetUnfolderBase]: For 47893/48580 co-relation queries the response was YES. [2023-11-29 02:23:03,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137270 conditions, 63884 events. 35794/63884 cut-off events. For 47893/48580 co-relation queries the response was YES. Maximal size of possible extension queue 2110. Compared 607149 event pairs, 14868 based on Foata normal form. 1254/63379 useless extension candidates. Maximal degree in co-relation 137250. Up to 23354 conditions per place. [2023-11-29 02:23:04,134 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 126 selfloop transitions, 7 changer transitions 0/156 dead transitions. [2023-11-29 02:23:04,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 156 transitions, 851 flow [2023-11-29 02:23:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:23:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:23:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 305 transitions. [2023-11-29 02:23:04,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434599156118144 [2023-11-29 02:23:04,262 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 305 transitions. [2023-11-29 02:23:04,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 305 transitions. [2023-11-29 02:23:04,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:23:04,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 305 transitions. [2023-11-29 02:23:04,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:04,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:04,266 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:04,266 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 223 flow. Second operand 6 states and 305 transitions. [2023-11-29 02:23:04,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 156 transitions, 851 flow [2023-11-29 02:23:04,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 156 transitions, 790 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-29 02:23:04,325 INFO L231 Difference]: Finished difference. Result has 86 places, 68 transitions, 243 flow [2023-11-29 02:23:04,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=86, PETRI_TRANSITIONS=68} [2023-11-29 02:23:04,326 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2023-11-29 02:23:04,326 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 68 transitions, 243 flow [2023-11-29 02:23:04,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 33.25) internal successors, (399), 12 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:04,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:23:04,327 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:23:04,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:23:04,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 02:23:04,528 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-29 02:23:04,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:23:04,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1257586409, now seen corresponding path program 1 times [2023-11-29 02:23:04,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:23:04,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135056466] [2023-11-29 02:23:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:23:04,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:23:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:23:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 02:23:04,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:23:04,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135056466] [2023-11-29 02:23:04,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135056466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:23:04,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324714959] [2023-11-29 02:23:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:23:04,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:23:04,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:23:04,716 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:23:04,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:23:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:23:04,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:23:04,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:23:04,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:23:04,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:23:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:23:04,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:23:04,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324714959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:23:04,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:23:04,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-29 02:23:04,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475048045] [2023-11-29 02:23:04,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:23:04,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:23:04,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:23:04,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:23:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:23:05,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 02:23:05,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 68 transitions, 243 flow. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:05,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:23:05,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 02:23:05,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:23:15,075 INFO L124 PetriNetUnfolderBase]: 63782/106662 cut-off events. [2023-11-29 02:23:15,076 INFO L125 PetriNetUnfolderBase]: For 82954/84148 co-relation queries the response was YES. [2023-11-29 02:23:15,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241840 conditions, 106662 events. 63782/106662 cut-off events. For 82954/84148 co-relation queries the response was YES. Maximal size of possible extension queue 3248. Compared 994868 event pairs, 33231 based on Foata normal form. 0/101993 useless extension candidates. Maximal degree in co-relation 241817. Up to 51341 conditions per place. [2023-11-29 02:23:15,880 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 80 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-11-29 02:23:15,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 107 transitions, 566 flow [2023-11-29 02:23:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:23:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:23:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 193 transitions. [2023-11-29 02:23:15,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107594936708861 [2023-11-29 02:23:15,882 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 193 transitions. [2023-11-29 02:23:15,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 193 transitions. [2023-11-29 02:23:15,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:23:15,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 193 transitions. [2023-11-29 02:23:15,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:15,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:15,885 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:15,885 INFO L175 Difference]: Start difference. First operand has 86 places, 68 transitions, 243 flow. Second operand 4 states and 193 transitions. [2023-11-29 02:23:15,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 107 transitions, 566 flow [2023-11-29 02:23:15,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 107 transitions, 553 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 02:23:15,913 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 257 flow [2023-11-29 02:23:15,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=88, PETRI_TRANSITIONS=70} [2023-11-29 02:23:15,914 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2023-11-29 02:23:15,914 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 257 flow [2023-11-29 02:23:15,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:15,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:23:15,914 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:23:15,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:23:16,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca8ddc8-fece-4d5d-81b9-7a42f43325b7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 02:23:16,115 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-29 02:23:16,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:23:16,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1061638114, now seen corresponding path program 1 times [2023-11-29 02:23:16,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:23:16,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967452206] [2023-11-29 02:23:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:23:16,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:23:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:23:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:23:16,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:23:16,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967452206] [2023-11-29 02:23:16,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967452206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:23:16,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:23:16,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:23:16,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598230153] [2023-11-29 02:23:16,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:23:16,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:23:16,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:23:16,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:23:16,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:23:16,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 02:23:16,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 70 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:16,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:23:16,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 02:23:16,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:23:25,826 INFO L124 PetriNetUnfolderBase]: 59569/97970 cut-off events. [2023-11-29 02:23:25,826 INFO L125 PetriNetUnfolderBase]: For 66973/68107 co-relation queries the response was YES. [2023-11-29 02:23:26,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232924 conditions, 97970 events. 59569/97970 cut-off events. For 66973/68107 co-relation queries the response was YES. Maximal size of possible extension queue 2821. Compared 883377 event pairs, 7180 based on Foata normal form. 3249/98590 useless extension candidates. Maximal degree in co-relation 232899. Up to 68913 conditions per place. [2023-11-29 02:23:26,770 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 73 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2023-11-29 02:23:26,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 99 transitions, 528 flow [2023-11-29 02:23:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:23:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:23:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2023-11-29 02:23:26,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6497890295358649 [2023-11-29 02:23:26,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2023-11-29 02:23:26,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2023-11-29 02:23:26,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:23:26,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2023-11-29 02:23:26,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:26,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:26,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:26,775 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 257 flow. Second operand 3 states and 154 transitions. [2023-11-29 02:23:26,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 99 transitions, 528 flow [2023-11-29 02:23:26,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 99 transitions, 520 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:23:26,812 INFO L231 Difference]: Finished difference. Result has 89 places, 70 transitions, 265 flow [2023-11-29 02:23:26,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=89, PETRI_TRANSITIONS=70} [2023-11-29 02:23:26,813 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2023-11-29 02:23:26,813 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 70 transitions, 265 flow [2023-11-29 02:23:26,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:26,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:23:26,813 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-29 02:23:26,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-29 02:23:26,813 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-29 02:23:26,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:23:26,814 INFO L85 PathProgramCache]: Analyzing trace with hash -331431315, now seen corresponding path program 1 times [2023-11-29 02:23:26,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:23:26,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785298007] [2023-11-29 02:23:26,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:23:26,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:23:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:23:26,829 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:23:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:23:26,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:23:26,846 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:23:26,847 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2023-11-29 02:23:26,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-11-29 02:23:26,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-11-29 02:23:26,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (12 of 16 remaining) [2023-11-29 02:23:26,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-11-29 02:23:26,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-11-29 02:23:26,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2023-11-29 02:23:26,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-11-29 02:23:26,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-11-29 02:23:26,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 16 remaining) [2023-11-29 02:23:26,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-11-29 02:23:26,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-11-29 02:23:26,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2023-11-29 02:23:26,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-11-29 02:23:26,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-11-29 02:23:26,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2023-11-29 02:23:26,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-29 02:23:26,851 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:23:26,852 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 02:23:26,853 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 02:23:26,894 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:23:26,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 102 transitions, 232 flow [2023-11-29 02:23:26,910 INFO L124 PetriNetUnfolderBase]: 16/133 cut-off events. [2023-11-29 02:23:26,910 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-29 02:23:26,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 133 events. 16/133 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 470 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 114. Up to 5 conditions per place. [2023-11-29 02:23:26,911 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 102 transitions, 232 flow [2023-11-29 02:23:26,913 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 102 transitions, 232 flow [2023-11-29 02:23:26,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:23:26,914 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@26ed3d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:23:26,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-11-29 02:23:26,916 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:23:26,916 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 02:23:26,917 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:23:26,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:23:26,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:23:26,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2023-11-29 02:23:26,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:23:26,917 INFO L85 PathProgramCache]: Analyzing trace with hash 589765, now seen corresponding path program 1 times [2023-11-29 02:23:26,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:23:26,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435356438] [2023-11-29 02:23:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:23:26,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:23:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:23:26,936 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 02:23:26,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:23:26,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435356438] [2023-11-29 02:23:26,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435356438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:23:26,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:23:26,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:23:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060947129] [2023-11-29 02:23:26,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:23:26,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:23:26,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:23:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:23:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:23:26,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 102 [2023-11-29 02:23:26,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:26,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:23:26,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 102 [2023-11-29 02:23:26,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:23:48,826 INFO L124 PetriNetUnfolderBase]: 165242/248942 cut-off events. [2023-11-29 02:23:48,826 INFO L125 PetriNetUnfolderBase]: For 13129/13129 co-relation queries the response was YES. [2023-11-29 02:23:49,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461664 conditions, 248942 events. 165242/248942 cut-off events. For 13129/13129 co-relation queries the response was YES. Maximal size of possible extension queue 6826. Compared 2146304 event pairs, 145557 based on Foata normal form. 59792/299004 useless extension candidates. Maximal degree in co-relation 37284. Up to 207284 conditions per place. [2023-11-29 02:23:50,978 INFO L140 encePairwiseOnDemand]: 91/102 looper letters, 47 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-11-29 02:23:50,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 296 flow [2023-11-29 02:23:50,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:23:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:23:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2023-11-29 02:23:50,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718954248366013 [2023-11-29 02:23:50,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2023-11-29 02:23:50,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2023-11-29 02:23:50,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:23:50,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2023-11-29 02:23:50,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:50,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:50,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:50,984 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 232 flow. Second operand 3 states and 175 transitions. [2023-11-29 02:23:50,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 296 flow [2023-11-29 02:23:50,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 290 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-29 02:23:50,994 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 196 flow [2023-11-29 02:23:50,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2023-11-29 02:23:50,995 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -6 predicate places. [2023-11-29 02:23:50,995 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 196 flow [2023-11-29 02:23:50,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:50,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:23:50,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:23:50,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-29 02:23:50,996 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2023-11-29 02:23:50,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:23:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash 589766, now seen corresponding path program 1 times [2023-11-29 02:23:50,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:23:50,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167439527] [2023-11-29 02:23:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:23:50,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:23:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:23:51,031 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 02:23:51,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:23:51,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167439527] [2023-11-29 02:23:51,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167439527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:23:51,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:23:51,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:23:51,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212312803] [2023-11-29 02:23:51,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:23:51,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:23:51,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:23:51,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:23:51,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:23:51,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 102 [2023-11-29 02:23:51,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:23:51,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:23:51,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 102 [2023-11-29 02:23:51,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:24:07,988 INFO L124 PetriNetUnfolderBase]: 121630/185020 cut-off events. [2023-11-29 02:24:07,988 INFO L125 PetriNetUnfolderBase]: For 3349/3349 co-relation queries the response was YES. [2023-11-29 02:24:08,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341323 conditions, 185020 events. 121630/185020 cut-off events. For 3349/3349 co-relation queries the response was YES. Maximal size of possible extension queue 5154. Compared 1568571 event pairs, 106668 based on Foata normal form. 11111/188404 useless extension candidates. Maximal degree in co-relation 341313. Up to 152963 conditions per place. [2023-11-29 02:24:09,338 INFO L140 encePairwiseOnDemand]: 100/102 looper letters, 46 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-11-29 02:24:09,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 85 transitions, 288 flow [2023-11-29 02:24:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:24:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:24:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-29 02:24:09,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2023-11-29 02:24:09,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-29 02:24:09,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-29 02:24:09,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:24:09,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-29 02:24:09,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:09,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:09,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:09,341 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 196 flow. Second operand 3 states and 168 transitions. [2023-11-29 02:24:09,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 85 transitions, 288 flow [2023-11-29 02:24:09,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:24:09,345 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 195 flow [2023-11-29 02:24:09,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2023-11-29 02:24:09,346 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -6 predicate places. [2023-11-29 02:24:09,346 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 195 flow [2023-11-29 02:24:09,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:09,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:24:09,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:09,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-29 02:24:09,346 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2023-11-29 02:24:09,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash -781288679, now seen corresponding path program 1 times [2023-11-29 02:24:09,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:09,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779146557] [2023-11-29 02:24:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:09,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:09,397 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 02:24:09,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:09,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779146557] [2023-11-29 02:24:09,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779146557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:24:09,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:24:09,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:24:09,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086172595] [2023-11-29 02:24:09,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:24:09,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:24:09,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:09,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:24:09,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:24:09,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 102 [2023-11-29 02:24:09,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 195 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:09,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:24:09,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 102 [2023-11-29 02:24:09,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand