./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --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_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/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_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/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_537956b9-a771-4b90-b71e-ec6dd1b99da5/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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 07:08:08,864 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 07:08:08,943 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 07:08:08,948 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 07:08:08,949 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 07:08:08,980 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 07:08:08,981 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 07:08:08,981 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 07:08:08,982 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 07:08:08,983 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 07:08:08,983 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 07:08:08,984 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 07:08:08,984 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 07:08:08,985 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 07:08:08,985 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 07:08:08,986 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 07:08:08,986 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 07:08:08,987 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 07:08:08,987 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 07:08:08,988 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 07:08:08,989 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 07:08:08,989 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 07:08:08,990 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 07:08:08,990 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 07:08:08,991 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 07:08:08,991 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 07:08:08,992 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 07:08:08,992 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 07:08:08,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 07:08:08,993 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 07:08:08,993 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 07:08:08,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 07:08:08,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 07:08:08,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 07:08:08,994 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 07:08:08,994 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 07:08:08,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 07:08:08,995 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 07:08:08,995 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 07:08:08,995 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 07:08:08,995 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 07:08:08,996 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_537956b9-a771-4b90-b71e-ec6dd1b99da5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2023-11-29 07:08:09,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 07:08:09,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 07:08:09,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 07:08:09,234 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 07:08:09,235 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 07:08:09,236 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-11-29 07:08:11,927 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 07:08:12,137 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 07:08:12,137 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-11-29 07:08:12,146 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/data/1640c8c42/08360cc40f0a4271bbbdef66abc76aa8/FLAGd1b8b8dc0 [2023-11-29 07:08:12,160 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/data/1640c8c42/08360cc40f0a4271bbbdef66abc76aa8 [2023-11-29 07:08:12,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 07:08:12,164 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 07:08:12,165 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 07:08:12,165 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 07:08:12,170 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 07:08:12,171 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490db910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12, skipping insertion in model container [2023-11-29 07:08:12,172 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,198 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 07:08:12,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 07:08:12,403 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 07:08:12,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 07:08:12,458 INFO L206 MainTranslator]: Completed translation [2023-11-29 07:08:12,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12 WrapperNode [2023-11-29 07:08:12,458 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 07:08:12,459 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 07:08:12,459 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 07:08:12,460 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 07:08:12,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,478 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,520 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 22, calls inlined = 30, statements flattened = 411 [2023-11-29 07:08:12,520 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 07:08:12,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 07:08:12,521 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 07:08:12,522 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 07:08:12,534 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,540 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,563 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 2, 2, 18]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 2]. [2023-11-29 07:08:12,563 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,563 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,580 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,587 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,590 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,593 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,599 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 07:08:12,600 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 07:08:12,600 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 07:08:12,600 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 07:08:12,601 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (1/1) ... [2023-11-29 07:08:12,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 07:08:12,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:08:12,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 07:08:12,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 07:08:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 07:08:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 07:08:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 07:08:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 07:08:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 07:08:12,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 07:08:12,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 07:08:12,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 07:08:12,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 07:08:12,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 07:08:12,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 07:08:12,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 07:08:12,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 07:08:12,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 07:08:12,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 07:08:12,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 07:08:12,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 07:08:12,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 07:08:12,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 07:08:12,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 07:08:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 07:08:12,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 07:08:12,682 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 07:08:12,810 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 07:08:12,812 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 07:08:13,446 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 07:08:14,060 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 07:08:14,060 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 07:08:14,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:08:14 BoogieIcfgContainer [2023-11-29 07:08:14,061 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 07:08:14,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 07:08:14,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 07:08:14,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 07:08:14,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:08:12" (1/3) ... [2023-11-29 07:08:14,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d903e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:08:14, skipping insertion in model container [2023-11-29 07:08:14,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:08:12" (2/3) ... [2023-11-29 07:08:14,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d903e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:08:14, skipping insertion in model container [2023-11-29 07:08:14,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:08:14" (3/3) ... [2023-11-29 07:08:14,069 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2023-11-29 07:08:14,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 07:08:14,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-11-29 07:08:14,089 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 07:08:14,193 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 07:08:14,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 139 transitions, 292 flow [2023-11-29 07:08:14,284 INFO L124 PetriNetUnfolderBase]: 20/137 cut-off events. [2023-11-29 07:08:14,284 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 07:08:14,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 137 events. 20/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 450 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2023-11-29 07:08:14,289 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 139 transitions, 292 flow [2023-11-29 07:08:14,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 136 transitions, 284 flow [2023-11-29 07:08:14,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 07:08:14,313 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;@4b76be91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 07:08:14,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-11-29 07:08:14,316 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 07:08:14,316 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 07:08:14,317 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 07:08:14,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:14,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 07:08:14,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:14,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:14,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1303401, now seen corresponding path program 1 times [2023-11-29 07:08:14,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:14,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302483507] [2023-11-29 07:08:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:14,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:14,572 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 07:08:14,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:14,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302483507] [2023-11-29 07:08:14,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302483507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:14,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:14,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 07:08:14,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846160869] [2023-11-29 07:08:14,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:14,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:08:14,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:08:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:08:14,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-11-29 07:08:14,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 136 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:08:14,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:14,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-11-29 07:08:14,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:15,315 INFO L124 PetriNetUnfolderBase]: 1323/3208 cut-off events. [2023-11-29 07:08:15,315 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-29 07:08:15,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5159 conditions, 3208 events. 1323/3208 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 23482 event pairs, 701 based on Foata normal form. 60/2473 useless extension candidates. Maximal degree in co-relation 5009. Up to 1897 conditions per place. [2023-11-29 07:08:15,346 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 54 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2023-11-29 07:08:15,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 130 transitions, 384 flow [2023-11-29 07:08:15,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:08:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 07:08:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-11-29 07:08:15,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7002398081534772 [2023-11-29 07:08:15,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-11-29 07:08:15,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-11-29 07:08:15,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:15,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-11-29 07:08:15,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 07:08:15,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:08:15,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:08:15,378 INFO L175 Difference]: Start difference. First operand has 123 places, 136 transitions, 284 flow. Second operand 3 states and 292 transitions. [2023-11-29 07:08:15,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 130 transitions, 384 flow [2023-11-29 07:08:15,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 130 transitions, 376 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 07:08:15,387 INFO L231 Difference]: Finished difference. Result has 117 places, 130 transitions, 268 flow [2023-11-29 07:08:15,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=117, PETRI_TRANSITIONS=130} [2023-11-29 07:08:15,392 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -6 predicate places. [2023-11-29 07:08:15,392 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 130 transitions, 268 flow [2023-11-29 07:08:15,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:08:15,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:15,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 07:08:15,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 07:08:15,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:15,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:15,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1303402, now seen corresponding path program 1 times [2023-11-29 07:08:15,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:15,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346189915] [2023-11-29 07:08:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:15,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:15,598 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 07:08:15,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:15,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346189915] [2023-11-29 07:08:15,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346189915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:15,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:15,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 07:08:15,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024215265] [2023-11-29 07:08:15,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:15,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:08:15,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:08:15,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:08:15,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-11-29 07:08:15,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 130 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states 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 07:08:15,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:15,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-11-29 07:08:15,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:16,227 INFO L124 PetriNetUnfolderBase]: 1323/3212 cut-off events. [2023-11-29 07:08:16,227 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-29 07:08:16,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5140 conditions, 3212 events. 1323/3212 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 23486 event pairs, 701 based on Foata normal form. 1/2417 useless extension candidates. Maximal degree in co-relation 5109. Up to 1905 conditions per place. [2023-11-29 07:08:16,256 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 58 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2023-11-29 07:08:16,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 134 transitions, 400 flow [2023-11-29 07:08:16,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:08:16,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 07:08:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-11-29 07:08:16,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7122302158273381 [2023-11-29 07:08:16,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-11-29 07:08:16,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-11-29 07:08:16,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:16,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-11-29 07:08:16,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 07:08:16,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:08:16,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:08:16,265 INFO L175 Difference]: Start difference. First operand has 117 places, 130 transitions, 268 flow. Second operand 3 states and 297 transitions. [2023-11-29 07:08:16,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 134 transitions, 400 flow [2023-11-29 07:08:16,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 134 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 07:08:16,269 INFO L231 Difference]: Finished difference. Result has 118 places, 132 transitions, 290 flow [2023-11-29 07:08:16,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=118, PETRI_TRANSITIONS=132} [2023-11-29 07:08:16,270 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -5 predicate places. [2023-11-29 07:08:16,270 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 132 transitions, 290 flow [2023-11-29 07:08:16,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states 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 07:08:16,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:16,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 07:08:16,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 07:08:16,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:16,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1252610931, now seen corresponding path program 1 times [2023-11-29 07:08:16,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:16,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808442521] [2023-11-29 07:08:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:16,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:16,480 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 07:08:16,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:16,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808442521] [2023-11-29 07:08:16,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808442521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:16,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290116983] [2023-11-29 07:08:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:16,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:08:16,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:08:16,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:08:16,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 07:08:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:16,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 07:08:16,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:16,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 07:08:16,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:16,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:08:16,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:16,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:08:16,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:16,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 07:08:16,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:16,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 07:08:16,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:16,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:08:16,760 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 07:08:16,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:08:16,840 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 07:08:16,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290116983] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:08:16,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:08:16,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-29 07:08:16,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410237179] [2023-11-29 07:08:16,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:08:16,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 07:08:16,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:16,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 07:08:16,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:08:17,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-11-29 07:08:17,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 132 transitions, 290 flow. Second operand has 9 states, 9 states have (on average 78.66666666666667) internal successors, (708), 9 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 07:08:17,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:17,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-11-29 07:08:17,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:18,008 INFO L124 PetriNetUnfolderBase]: 1327/3228 cut-off events. [2023-11-29 07:08:18,008 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-29 07:08:18,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5192 conditions, 3228 events. 1327/3228 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 23543 event pairs, 701 based on Foata normal form. 2/2435 useless extension candidates. Maximal degree in co-relation 5141. Up to 1907 conditions per place. [2023-11-29 07:08:18,038 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 64 selfloop transitions, 14 changer transitions 0/150 dead transitions. [2023-11-29 07:08:18,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 150 transitions, 504 flow [2023-11-29 07:08:18,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:08:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 07:08:18,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 548 transitions. [2023-11-29 07:08:18,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657074340527578 [2023-11-29 07:08:18,042 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 548 transitions. [2023-11-29 07:08:18,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 548 transitions. [2023-11-29 07:08:18,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:18,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 548 transitions. [2023-11-29 07:08:18,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.33333333333333) internal successors, (548), 6 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 07:08:18,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:08:18,049 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:08:18,049 INFO L175 Difference]: Start difference. First operand has 118 places, 132 transitions, 290 flow. Second operand 6 states and 548 transitions. [2023-11-29 07:08:18,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 150 transitions, 504 flow [2023-11-29 07:08:18,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 150 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 07:08:18,054 INFO L231 Difference]: Finished difference. Result has 125 places, 142 transitions, 388 flow [2023-11-29 07:08:18,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=388, PETRI_PLACES=125, PETRI_TRANSITIONS=142} [2023-11-29 07:08:18,055 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 2 predicate places. [2023-11-29 07:08:18,055 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 142 transitions, 388 flow [2023-11-29 07:08:18,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.66666666666667) internal successors, (708), 9 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 07:08:18,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:18,056 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 07:08:18,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 07:08:18,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:08:18,257 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:18,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1163439630, now seen corresponding path program 2 times [2023-11-29 07:08:18,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:18,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19609569] [2023-11-29 07:08:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:18,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:18,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:18,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19609569] [2023-11-29 07:08:18,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19609569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:18,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537413809] [2023-11-29 07:08:18,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 07:08:18,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:08:18,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:08:18,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:08:18,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 07:08:18,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 07:08:18,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:08:18,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 07:08:18,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:18,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 07:08:18,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:18,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:08:18,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:18,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 07:08:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:18,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:08:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:18,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 07:08:18,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:18,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:08:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:19,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:08:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:19,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537413809] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:08:19,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:08:19,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-11-29 07:08:19,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446397044] [2023-11-29 07:08:19,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:08:19,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 07:08:19,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:19,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 07:08:19,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-29 07:08:20,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-11-29 07:08:20,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 142 transitions, 388 flow. Second operand has 18 states, 18 states have (on average 78.83333333333333) internal successors, (1419), 18 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states 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 07:08:20,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:20,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-11-29 07:08:20,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:22,011 INFO L124 PetriNetUnfolderBase]: 1333/3260 cut-off events. [2023-11-29 07:08:22,011 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-11-29 07:08:22,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5330 conditions, 3260 events. 1333/3260 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 23608 event pairs, 701 based on Foata normal form. 16/2483 useless extension candidates. Maximal degree in co-relation 5189. Up to 1910 conditions per place. [2023-11-29 07:08:22,041 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 78 selfloop transitions, 32 changer transitions 0/182 dead transitions. [2023-11-29 07:08:22,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 182 transitions, 772 flow [2023-11-29 07:08:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 07:08:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 07:08:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1050 transitions. [2023-11-29 07:08:22,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6294964028776978 [2023-11-29 07:08:22,046 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1050 transitions. [2023-11-29 07:08:22,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1050 transitions. [2023-11-29 07:08:22,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:22,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1050 transitions. [2023-11-29 07:08:22,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 87.5) internal successors, (1050), 12 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:08:22,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 139.0) internal successors, (1807), 13 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states 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 07:08:22,056 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 139.0) internal successors, (1807), 13 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states 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 07:08:22,056 INFO L175 Difference]: Start difference. First operand has 125 places, 142 transitions, 388 flow. Second operand 12 states and 1050 transitions. [2023-11-29 07:08:22,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 182 transitions, 772 flow [2023-11-29 07:08:22,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 182 transitions, 751 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 07:08:22,063 INFO L231 Difference]: Finished difference. Result has 140 places, 160 transitions, 589 flow [2023-11-29 07:08:22,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=589, PETRI_PLACES=140, PETRI_TRANSITIONS=160} [2023-11-29 07:08:22,065 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 17 predicate places. [2023-11-29 07:08:22,065 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 160 transitions, 589 flow [2023-11-29 07:08:22,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 78.83333333333333) internal successors, (1419), 18 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states 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 07:08:22,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:22,066 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2023-11-29 07:08:22,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 07:08:22,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:08:22,267 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:22,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:22,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1374029079, now seen corresponding path program 3 times [2023-11-29 07:08:22,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:22,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409713143] [2023-11-29 07:08:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:22,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:22,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:22,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409713143] [2023-11-29 07:08:22,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409713143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:22,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:22,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 07:08:22,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676659567] [2023-11-29 07:08:22,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:22,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 07:08:22,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:22,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 07:08:22,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:08:22,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 139 [2023-11-29 07:08:22,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 160 transitions, 589 flow. Second operand has 8 states, 8 states have (on average 80.5) internal successors, (644), 8 states have internal predecessors, (644), 0 states have call successors, (0), 0 states 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 07:08:22,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:22,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 139 [2023-11-29 07:08:22,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:22,895 INFO L124 PetriNetUnfolderBase]: 1321/3222 cut-off events. [2023-11-29 07:08:22,895 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-29 07:08:22,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5207 conditions, 3222 events. 1321/3222 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 23481 event pairs, 701 based on Foata normal form. 2/2431 useless extension candidates. Maximal degree in co-relation 5194. Up to 1897 conditions per place. [2023-11-29 07:08:22,916 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 59 selfloop transitions, 13 changer transitions 0/144 dead transitions. [2023-11-29 07:08:22,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 144 transitions, 514 flow [2023-11-29 07:08:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 07:08:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 07:08:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 706 transitions. [2023-11-29 07:08:22,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6348920863309353 [2023-11-29 07:08:22,950 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 706 transitions. [2023-11-29 07:08:22,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 706 transitions. [2023-11-29 07:08:22,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:22,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 706 transitions. [2023-11-29 07:08:22,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.25) internal successors, (706), 8 states have internal predecessors, (706), 0 states have call successors, (0), 0 states 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 07:08:22,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 139.0) internal successors, (1251), 9 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states 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 07:08:22,956 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 139.0) internal successors, (1251), 9 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states 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 07:08:22,956 INFO L175 Difference]: Start difference. First operand has 140 places, 160 transitions, 589 flow. Second operand 8 states and 706 transitions. [2023-11-29 07:08:22,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 144 transitions, 514 flow [2023-11-29 07:08:22,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 144 transitions, 460 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-11-29 07:08:22,960 INFO L231 Difference]: Finished difference. Result has 131 places, 136 transitions, 334 flow [2023-11-29 07:08:22,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=131, PETRI_TRANSITIONS=136} [2023-11-29 07:08:22,961 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 8 predicate places. [2023-11-29 07:08:22,961 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 136 transitions, 334 flow [2023-11-29 07:08:22,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.5) internal successors, (644), 8 states have internal predecessors, (644), 0 states have call successors, (0), 0 states 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 07:08:22,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:22,962 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1] [2023-11-29 07:08:22,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 07:08:22,962 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:22,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:22,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1779886498, now seen corresponding path program 1 times [2023-11-29 07:08:22,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:22,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697704768] [2023-11-29 07:08:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:22,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 07:08:23,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:23,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697704768] [2023-11-29 07:08:23,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697704768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:23,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:23,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:08:23,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709994786] [2023-11-29 07:08:23,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:23,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:08:23,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:23,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:08:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:08:23,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 139 [2023-11-29 07:08:23,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 136 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 07:08:23,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:23,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 139 [2023-11-29 07:08:23,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:23,919 INFO L124 PetriNetUnfolderBase]: 2082/4848 cut-off events. [2023-11-29 07:08:23,919 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-29 07:08:23,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7854 conditions, 4848 events. 2082/4848 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 37497 event pairs, 1164 based on Foata normal form. 0/3697 useless extension candidates. Maximal degree in co-relation 7846. Up to 2924 conditions per place. [2023-11-29 07:08:23,949 INFO L140 encePairwiseOnDemand]: 135/139 looper letters, 64 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2023-11-29 07:08:23,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 134 transitions, 462 flow [2023-11-29 07:08:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:08:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 07:08:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2023-11-29 07:08:23,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6330935251798561 [2023-11-29 07:08:23,952 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 352 transitions. [2023-11-29 07:08:23,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 352 transitions. [2023-11-29 07:08:23,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:23,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 352 transitions. [2023-11-29 07:08:23,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 07:08:23,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 07:08:23,955 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 07:08:23,956 INFO L175 Difference]: Start difference. First operand has 131 places, 136 transitions, 334 flow. Second operand 4 states and 352 transitions. [2023-11-29 07:08:23,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 134 transitions, 462 flow [2023-11-29 07:08:23,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 134 transitions, 436 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-29 07:08:23,959 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 308 flow [2023-11-29 07:08:23,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=308, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2023-11-29 07:08:23,960 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 2 predicate places. [2023-11-29 07:08:23,961 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 308 flow [2023-11-29 07:08:23,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 07:08:23,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:23,961 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1] [2023-11-29 07:08:23,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 07:08:23,962 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:23,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:23,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1779886497, now seen corresponding path program 1 times [2023-11-29 07:08:23,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:23,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698663874] [2023-11-29 07:08:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:23,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:08:24,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:24,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698663874] [2023-11-29 07:08:24,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698663874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:24,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:24,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 07:08:24,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374004761] [2023-11-29 07:08:24,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:24,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:08:24,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:24,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:08:24,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:08:24,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-11-29 07:08:24,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 308 flow. Second operand 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 07:08:24,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:24,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-11-29 07:08:24,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:24,763 INFO L124 PetriNetUnfolderBase]: 1321/3206 cut-off events. [2023-11-29 07:08:24,763 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-29 07:08:24,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5173 conditions, 3206 events. 1321/3206 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 23341 event pairs, 701 based on Foata normal form. 266/2695 useless extension candidates. Maximal degree in co-relation 5165. Up to 1896 conditions per place. [2023-11-29 07:08:24,785 INFO L140 encePairwiseOnDemand]: 135/139 looper letters, 62 selfloop transitions, 2 changer transitions 0/132 dead transitions. [2023-11-29 07:08:24,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 132 transitions, 432 flow [2023-11-29 07:08:24,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:08:24,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 07:08:24,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2023-11-29 07:08:24,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.658273381294964 [2023-11-29 07:08:24,787 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2023-11-29 07:08:24,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2023-11-29 07:08:24,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:24,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2023-11-29 07:08:24,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 07:08:24,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 07:08:24,790 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 07:08:24,791 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 308 flow. Second operand 4 states and 366 transitions. [2023-11-29 07:08:24,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 132 transitions, 432 flow [2023-11-29 07:08:24,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 132 transitions, 429 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 07:08:24,794 INFO L231 Difference]: Finished difference. Result has 124 places, 132 transitions, 305 flow [2023-11-29 07:08:24,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=305, PETRI_PLACES=124, PETRI_TRANSITIONS=132} [2023-11-29 07:08:24,795 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 1 predicate places. [2023-11-29 07:08:24,795 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 132 transitions, 305 flow [2023-11-29 07:08:24,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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 07:08:24,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:24,796 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:24,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 07:08:24,796 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:24,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:24,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1069008651, now seen corresponding path program 1 times [2023-11-29 07:08:24,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:24,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690695299] [2023-11-29 07:08:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:24,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 07:08:24,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:24,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690695299] [2023-11-29 07:08:24,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690695299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:24,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:24,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:08:24,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942447274] [2023-11-29 07:08:24,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:24,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:08:24,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:24,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:08:24,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:08:25,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 139 [2023-11-29 07:08:25,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 132 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 07:08:25,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:25,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 139 [2023-11-29 07:08:25,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:25,436 INFO L124 PetriNetUnfolderBase]: 1363/3327 cut-off events. [2023-11-29 07:08:25,436 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-29 07:08:25,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5365 conditions, 3327 events. 1363/3327 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 24512 event pairs, 727 based on Foata normal form. 0/2522 useless extension candidates. Maximal degree in co-relation 5357. Up to 1966 conditions per place. [2023-11-29 07:08:25,450 INFO L140 encePairwiseOnDemand]: 135/139 looper letters, 64 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2023-11-29 07:08:25,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 130 transitions, 433 flow [2023-11-29 07:08:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:08:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 07:08:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2023-11-29 07:08:25,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6330935251798561 [2023-11-29 07:08:25,452 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 352 transitions. [2023-11-29 07:08:25,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 352 transitions. [2023-11-29 07:08:25,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:25,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 352 transitions. [2023-11-29 07:08:25,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 07:08:25,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 07:08:25,455 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 07:08:25,455 INFO L175 Difference]: Start difference. First operand has 124 places, 132 transitions, 305 flow. Second operand 4 states and 352 transitions. [2023-11-29 07:08:25,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 130 transitions, 433 flow [2023-11-29 07:08:25,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 130 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 07:08:25,458 INFO L231 Difference]: Finished difference. Result has 123 places, 130 transitions, 302 flow [2023-11-29 07:08:25,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=123, PETRI_TRANSITIONS=130} [2023-11-29 07:08:25,459 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2023-11-29 07:08:25,459 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 130 transitions, 302 flow [2023-11-29 07:08:25,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 07:08:25,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:25,460 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:25,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 07:08:25,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:25,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:25,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1069008652, now seen corresponding path program 1 times [2023-11-29 07:08:25,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:25,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056916704] [2023-11-29 07:08:25,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:25,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 07:08:25,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:25,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056916704] [2023-11-29 07:08:25,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056916704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:25,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504829103] [2023-11-29 07:08:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:25,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:08:25,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:08:25,806 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:08:25,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 07:08:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:25,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 07:08:25,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:25,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 07:08:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:26,058 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 07:08:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:08:26,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:26,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504829103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:26,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:08:26,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-29 07:08:26,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082316910] [2023-11-29 07:08:26,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:26,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:08:26,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:26,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:08:26,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:08:26,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-11-29 07:08:26,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 130 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 07:08:26,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:26,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-11-29 07:08:26,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:26,538 INFO L124 PetriNetUnfolderBase]: 1321/3202 cut-off events. [2023-11-29 07:08:26,538 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-29 07:08:26,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 3202 events. 1321/3202 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 23265 event pairs, 701 based on Foata normal form. 27/2456 useless extension candidates. Maximal degree in co-relation 5163. Up to 1918 conditions per place. [2023-11-29 07:08:26,551 INFO L140 encePairwiseOnDemand]: 136/139 looper letters, 63 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2023-11-29 07:08:26,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 128 transitions, 426 flow [2023-11-29 07:08:26,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:08:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 07:08:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2023-11-29 07:08:26,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6930455635491607 [2023-11-29 07:08:26,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2023-11-29 07:08:26,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2023-11-29 07:08:26,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:26,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2023-11-29 07:08:26,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:08:26,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:08:26,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:08:26,557 INFO L175 Difference]: Start difference. First operand has 123 places, 130 transitions, 302 flow. Second operand 3 states and 289 transitions. [2023-11-29 07:08:26,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 128 transitions, 426 flow [2023-11-29 07:08:26,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 128 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 07:08:26,560 INFO L231 Difference]: Finished difference. Result has 121 places, 128 transitions, 297 flow [2023-11-29 07:08:26,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=121, PETRI_TRANSITIONS=128} [2023-11-29 07:08:26,561 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -2 predicate places. [2023-11-29 07:08:26,561 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 128 transitions, 297 flow [2023-11-29 07:08:26,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 07:08:26,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:26,562 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:26,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 07:08:26,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:08:26,762 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:26,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash -332046149, now seen corresponding path program 1 times [2023-11-29 07:08:26,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:26,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089951569] [2023-11-29 07:08:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:26,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 07:08:27,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:27,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089951569] [2023-11-29 07:08:27,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089951569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:27,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415103153] [2023-11-29 07:08:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:27,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:08:27,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:08:27,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:08:27,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 07:08:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:27,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 07:08:27,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:27,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 07:08:27,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:27,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 07:08:27,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:27,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:08:27,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:27,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 07:08:27,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:27,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 07:08:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:27,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:08:27,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:27,338 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 16 treesize of output 11 [2023-11-29 07:08:27,353 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 07:08:27,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 07:08:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 07:08:27,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:08:27,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-11-29 07:08:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 07:08:27,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415103153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:08:27,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:08:27,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 21 [2023-11-29 07:08:27,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365549029] [2023-11-29 07:08:27,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:08:27,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 07:08:27,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 07:08:27,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-11-29 07:08:30,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 139 [2023-11-29 07:08:30,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 128 transitions, 297 flow. Second operand has 23 states, 23 states have (on average 75.3913043478261) internal successors, (1734), 23 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states 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 07:08:30,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:30,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 139 [2023-11-29 07:08:30,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:31,987 INFO L124 PetriNetUnfolderBase]: 3012/6750 cut-off events. [2023-11-29 07:08:31,988 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-29 07:08:31,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11246 conditions, 6750 events. 3012/6750 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 49676 event pairs, 464 based on Foata normal form. 0/5510 useless extension candidates. Maximal degree in co-relation 11238. Up to 1873 conditions per place. [2023-11-29 07:08:32,018 INFO L140 encePairwiseOnDemand]: 127/139 looper letters, 135 selfloop transitions, 15 changer transitions 0/210 dead transitions. [2023-11-29 07:08:32,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 210 transitions, 783 flow [2023-11-29 07:08:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 07:08:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 07:08:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1253 transitions. [2023-11-29 07:08:32,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009592326139088 [2023-11-29 07:08:32,023 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1253 transitions. [2023-11-29 07:08:32,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1253 transitions. [2023-11-29 07:08:32,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:32,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1253 transitions. [2023-11-29 07:08:32,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 83.53333333333333) internal successors, (1253), 15 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 07:08:32,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 139.0) internal successors, (2224), 16 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states 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 07:08:32,033 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 139.0) internal successors, (2224), 16 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states 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 07:08:32,034 INFO L175 Difference]: Start difference. First operand has 121 places, 128 transitions, 297 flow. Second operand 15 states and 1253 transitions. [2023-11-29 07:08:32,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 210 transitions, 783 flow [2023-11-29 07:08:32,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 210 transitions, 782 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 07:08:32,039 INFO L231 Difference]: Finished difference. Result has 134 places, 127 transitions, 339 flow [2023-11-29 07:08:32,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=339, PETRI_PLACES=134, PETRI_TRANSITIONS=127} [2023-11-29 07:08:32,041 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 11 predicate places. [2023-11-29 07:08:32,041 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 127 transitions, 339 flow [2023-11-29 07:08:32,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 75.3913043478261) internal successors, (1734), 23 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states 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 07:08:32,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:32,042 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:32,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 07:08:32,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 07:08:32,248 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:32,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:32,248 INFO L85 PathProgramCache]: Analyzing trace with hash -332046150, now seen corresponding path program 1 times [2023-11-29 07:08:32,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:32,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453453810] [2023-11-29 07:08:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:32,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 07:08:32,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:32,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453453810] [2023-11-29 07:08:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453453810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:32,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:32,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:08:32,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979636561] [2023-11-29 07:08:32,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:32,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:08:32,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:32,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:08:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:08:32,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 139 [2023-11-29 07:08:32,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 127 transitions, 339 flow. Second operand has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 07:08:32,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:32,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 139 [2023-11-29 07:08:32,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:33,165 INFO L124 PetriNetUnfolderBase]: 2847/6338 cut-off events. [2023-11-29 07:08:33,165 INFO L125 PetriNetUnfolderBase]: For 524/534 co-relation queries the response was YES. [2023-11-29 07:08:33,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11012 conditions, 6338 events. 2847/6338 cut-off events. For 524/534 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 45890 event pairs, 1601 based on Foata normal form. 94/5244 useless extension candidates. Maximal degree in co-relation 11001. Up to 4128 conditions per place. [2023-11-29 07:08:33,201 INFO L140 encePairwiseOnDemand]: 128/139 looper letters, 63 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2023-11-29 07:08:33,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 455 flow [2023-11-29 07:08:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:08:33,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 07:08:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 409 transitions. [2023-11-29 07:08:33,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884892086330935 [2023-11-29 07:08:33,204 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 409 transitions. [2023-11-29 07:08:33,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 409 transitions. [2023-11-29 07:08:33,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:33,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 409 transitions. [2023-11-29 07:08:33,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 states 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 07:08:33,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 07:08:33,207 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 07:08:33,207 INFO L175 Difference]: Start difference. First operand has 134 places, 127 transitions, 339 flow. Second operand 5 states and 409 transitions. [2023-11-29 07:08:33,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 455 flow [2023-11-29 07:08:33,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 119 transitions, 438 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 07:08:33,212 INFO L231 Difference]: Finished difference. Result has 125 places, 119 transitions, 312 flow [2023-11-29 07:08:33,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=125, PETRI_TRANSITIONS=119} [2023-11-29 07:08:33,213 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 2 predicate places. [2023-11-29 07:08:33,213 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 119 transitions, 312 flow [2023-11-29 07:08:33,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 07:08:33,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:33,213 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:33,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 07:08:33,213 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:33,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:33,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1268723938, now seen corresponding path program 1 times [2023-11-29 07:08:33,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:33,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575908113] [2023-11-29 07:08:33,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:33,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 07:08:33,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:33,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575908113] [2023-11-29 07:08:33,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575908113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:33,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:33,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:08:33,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014389380] [2023-11-29 07:08:33,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:33,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:08:33,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:33,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:08:33,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:08:33,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 139 [2023-11-29 07:08:33,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 119 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 07:08:33,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:33,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 139 [2023-11-29 07:08:33,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:34,087 INFO L124 PetriNetUnfolderBase]: 2847/6012 cut-off events. [2023-11-29 07:08:34,087 INFO L125 PetriNetUnfolderBase]: For 519/529 co-relation queries the response was YES. [2023-11-29 07:08:34,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10681 conditions, 6012 events. 2847/6012 cut-off events. For 519/529 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 41229 event pairs, 1601 based on Foata normal form. 0/5150 useless extension candidates. Maximal degree in co-relation 10670. Up to 4128 conditions per place. [2023-11-29 07:08:34,124 INFO L140 encePairwiseOnDemand]: 129/139 looper letters, 64 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-11-29 07:08:34,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 111 transitions, 428 flow [2023-11-29 07:08:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:08:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 07:08:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 340 transitions. [2023-11-29 07:08:34,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6115107913669064 [2023-11-29 07:08:34,127 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 340 transitions. [2023-11-29 07:08:34,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 340 transitions. [2023-11-29 07:08:34,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:34,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 340 transitions. [2023-11-29 07:08:34,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states 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 07:08:34,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 07:08:34,129 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 07:08:34,130 INFO L175 Difference]: Start difference. First operand has 125 places, 119 transitions, 312 flow. Second operand 4 states and 340 transitions. [2023-11-29 07:08:34,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 111 transitions, 428 flow [2023-11-29 07:08:34,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 111 transitions, 423 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 07:08:34,134 INFO L231 Difference]: Finished difference. Result has 117 places, 111 transitions, 295 flow [2023-11-29 07:08:34,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=117, PETRI_TRANSITIONS=111} [2023-11-29 07:08:34,134 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -6 predicate places. [2023-11-29 07:08:34,134 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 111 transitions, 295 flow [2023-11-29 07:08:34,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 07:08:34,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:34,135 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:34,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 07:08:34,135 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:34,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1268723937, now seen corresponding path program 1 times [2023-11-29 07:08:34,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:34,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91218497] [2023-11-29 07:08:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 07:08:34,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:34,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91218497] [2023-11-29 07:08:34,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91218497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:34,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256493909] [2023-11-29 07:08:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:34,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:08:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:08:34,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:08:34,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 07:08:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:34,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 07:08:34,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 07:08:34,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:08:34,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 07:08:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 07:08:34,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256493909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:08:34,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:08:34,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2023-11-29 07:08:34,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636584714] [2023-11-29 07:08:34,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:08:34,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 07:08:34,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 07:08:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-11-29 07:08:36,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-29 07:08:36,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 111 transitions, 295 flow. Second operand has 21 states, 21 states have (on average 77.33333333333333) internal successors, (1624), 21 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states 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 07:08:36,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:36,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-29 07:08:36,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:37,511 INFO L124 PetriNetUnfolderBase]: 4036/7690 cut-off events. [2023-11-29 07:08:37,511 INFO L125 PetriNetUnfolderBase]: For 623/648 co-relation queries the response was YES. [2023-11-29 07:08:37,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14135 conditions, 7690 events. 4036/7690 cut-off events. For 623/648 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 48470 event pairs, 1064 based on Foata normal form. 0/6470 useless extension candidates. Maximal degree in co-relation 14124. Up to 2079 conditions per place. [2023-11-29 07:08:37,602 INFO L140 encePairwiseOnDemand]: 124/139 looper letters, 148 selfloop transitions, 18 changer transitions 0/207 dead transitions. [2023-11-29 07:08:37,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 207 transitions, 847 flow [2023-11-29 07:08:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 07:08:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 07:08:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 924 transitions. [2023-11-29 07:08:37,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647482014388489 [2023-11-29 07:08:37,605 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 924 transitions. [2023-11-29 07:08:37,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 924 transitions. [2023-11-29 07:08:37,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:37,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 924 transitions. [2023-11-29 07:08:37,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.4) internal successors, (924), 10 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 07:08:37,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 139.0) internal successors, (1529), 11 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states 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 07:08:37,612 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 139.0) internal successors, (1529), 11 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states 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 07:08:37,612 INFO L175 Difference]: Start difference. First operand has 117 places, 111 transitions, 295 flow. Second operand 10 states and 924 transitions. [2023-11-29 07:08:37,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 207 transitions, 847 flow [2023-11-29 07:08:37,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 207 transitions, 844 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 07:08:37,619 INFO L231 Difference]: Finished difference. Result has 127 places, 116 transitions, 383 flow [2023-11-29 07:08:37,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=383, PETRI_PLACES=127, PETRI_TRANSITIONS=116} [2023-11-29 07:08:37,620 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 4 predicate places. [2023-11-29 07:08:37,620 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 116 transitions, 383 flow [2023-11-29 07:08:37,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.33333333333333) internal successors, (1624), 21 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states 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 07:08:37,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:37,621 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:37,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 07:08:37,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 07:08:37,824 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:37,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1842974631, now seen corresponding path program 1 times [2023-11-29 07:08:37,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:37,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329854711] [2023-11-29 07:08:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:37,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 07:08:38,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:38,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329854711] [2023-11-29 07:08:38,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329854711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:38,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105771023] [2023-11-29 07:08:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:38,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:08:38,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:08:38,051 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:08:38,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 07:08:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:38,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 07:08:38,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 07:08:38,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:08:38,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 07:08:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 07:08:38,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105771023] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:08:38,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:08:38,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2023-11-29 07:08:38,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727199510] [2023-11-29 07:08:38,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:08:38,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 07:08:38,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:38,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 07:08:38,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-11-29 07:08:39,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-29 07:08:39,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 116 transitions, 383 flow. Second operand has 21 states, 21 states have (on average 77.47619047619048) internal successors, (1627), 21 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states 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 07:08:39,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:39,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-29 07:08:39,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:41,973 INFO L124 PetriNetUnfolderBase]: 7683/15142 cut-off events. [2023-11-29 07:08:41,974 INFO L125 PetriNetUnfolderBase]: For 5191/5469 co-relation queries the response was YES. [2023-11-29 07:08:42,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29383 conditions, 15142 events. 7683/15142 cut-off events. For 5191/5469 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 110544 event pairs, 1239 based on Foata normal form. 0/13061 useless extension candidates. Maximal degree in co-relation 29369. Up to 4614 conditions per place. [2023-11-29 07:08:42,068 INFO L140 encePairwiseOnDemand]: 127/139 looper letters, 152 selfloop transitions, 15 changer transitions 0/208 dead transitions. [2023-11-29 07:08:42,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 208 transitions, 1041 flow [2023-11-29 07:08:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 07:08:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 07:08:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 904 transitions. [2023-11-29 07:08:42,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6503597122302158 [2023-11-29 07:08:42,072 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 904 transitions. [2023-11-29 07:08:42,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 904 transitions. [2023-11-29 07:08:42,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:42,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 904 transitions. [2023-11-29 07:08:42,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.4) internal successors, (904), 10 states have internal predecessors, (904), 0 states have call successors, (0), 0 states 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 07:08:42,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 139.0) internal successors, (1529), 11 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states 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 07:08:42,079 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 139.0) internal successors, (1529), 11 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states 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 07:08:42,079 INFO L175 Difference]: Start difference. First operand has 127 places, 116 transitions, 383 flow. Second operand 10 states and 904 transitions. [2023-11-29 07:08:42,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 208 transitions, 1041 flow [2023-11-29 07:08:42,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 208 transitions, 1014 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-29 07:08:42,089 INFO L231 Difference]: Finished difference. Result has 129 places, 115 transitions, 403 flow [2023-11-29 07:08:42,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=403, PETRI_PLACES=129, PETRI_TRANSITIONS=115} [2023-11-29 07:08:42,090 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 6 predicate places. [2023-11-29 07:08:42,090 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 115 transitions, 403 flow [2023-11-29 07:08:42,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.47619047619048) internal successors, (1627), 21 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states 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 07:08:42,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:42,091 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:42,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 07:08:42,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 07:08:42,292 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:42,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1572047459, now seen corresponding path program 1 times [2023-11-29 07:08:42,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:42,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669635109] [2023-11-29 07:08:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:42,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 07:08:42,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:42,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669635109] [2023-11-29 07:08:42,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669635109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:42,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578623478] [2023-11-29 07:08:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:42,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:08:42,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:08:42,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:08:42,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 07:08:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:42,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 07:08:42,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:42,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 07:08:42,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:42,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 07:08:42,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:42,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:08:42,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:42,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 07:08:42,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:42,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:08:42,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:08:42,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 07:08:42,914 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 07:08:42,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-29 07:08:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 07:08:43,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:08:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 07:08:43,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578623478] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:43,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:08:43,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 22 [2023-11-29 07:08:43,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374550950] [2023-11-29 07:08:43,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:43,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 07:08:43,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 07:08:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-11-29 07:08:44,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-29 07:08:44,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 115 transitions, 403 flow. Second operand has 10 states, 10 states have (on average 77.3) internal successors, (773), 10 states have internal predecessors, (773), 0 states have call successors, (0), 0 states 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 07:08:44,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:44,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-29 07:08:44,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:46,576 INFO L124 PetriNetUnfolderBase]: 10572/19690 cut-off events. [2023-11-29 07:08:46,576 INFO L125 PetriNetUnfolderBase]: For 8123/8403 co-relation queries the response was YES. [2023-11-29 07:08:46,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40534 conditions, 19690 events. 10572/19690 cut-off events. For 8123/8403 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 143174 event pairs, 3544 based on Foata normal form. 0/16708 useless extension candidates. Maximal degree in co-relation 40517. Up to 7996 conditions per place. [2023-11-29 07:08:46,752 INFO L140 encePairwiseOnDemand]: 126/139 looper letters, 117 selfloop transitions, 10 changer transitions 0/165 dead transitions. [2023-11-29 07:08:46,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 165 transitions, 823 flow [2023-11-29 07:08:46,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:08:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 07:08:46,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 557 transitions. [2023-11-29 07:08:46,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678657074340527 [2023-11-29 07:08:46,754 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 557 transitions. [2023-11-29 07:08:46,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 557 transitions. [2023-11-29 07:08:46,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:46,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 557 transitions. [2023-11-29 07:08:46,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.83333333333333) internal successors, (557), 6 states have internal predecessors, (557), 0 states have call successors, (0), 0 states 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 07:08:46,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:08:46,757 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:08:46,757 INFO L175 Difference]: Start difference. First operand has 129 places, 115 transitions, 403 flow. Second operand 6 states and 557 transitions. [2023-11-29 07:08:46,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 165 transitions, 823 flow [2023-11-29 07:08:46,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 165 transitions, 802 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 07:08:46,767 INFO L231 Difference]: Finished difference. Result has 130 places, 120 transitions, 449 flow [2023-11-29 07:08:46,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=130, PETRI_TRANSITIONS=120} [2023-11-29 07:08:46,767 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 7 predicate places. [2023-11-29 07:08:46,767 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 120 transitions, 449 flow [2023-11-29 07:08:46,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 77.3) internal successors, (773), 10 states have internal predecessors, (773), 0 states have call successors, (0), 0 states 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 07:08:46,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:46,768 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:46,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 07:08:46,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 07:08:46,969 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:46,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash 521640500, now seen corresponding path program 1 times [2023-11-29 07:08:46,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:46,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275422918] [2023-11-29 07:08:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:08:47,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:47,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275422918] [2023-11-29 07:08:47,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275422918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:47,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:47,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:08:47,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8823524] [2023-11-29 07:08:47,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:47,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:08:47,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:47,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:08:47,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:08:47,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 139 [2023-11-29 07:08:47,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 120 transitions, 449 flow. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 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 07:08:47,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:47,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 139 [2023-11-29 07:08:47,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:50,647 INFO L124 PetriNetUnfolderBase]: 10281/19836 cut-off events. [2023-11-29 07:08:50,647 INFO L125 PetriNetUnfolderBase]: For 12591/12843 co-relation queries the response was YES. [2023-11-29 07:08:50,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43381 conditions, 19836 events. 10281/19836 cut-off events. For 12591/12843 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 148745 event pairs, 6052 based on Foata normal form. 7/17286 useless extension candidates. Maximal degree in co-relation 43362. Up to 14127 conditions per place. [2023-11-29 07:08:50,768 INFO L140 encePairwiseOnDemand]: 135/139 looper letters, 107 selfloop transitions, 1 changer transitions 9/159 dead transitions. [2023-11-29 07:08:50,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 159 transitions, 818 flow [2023-11-29 07:08:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:08:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 07:08:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 406 transitions. [2023-11-29 07:08:50,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7302158273381295 [2023-11-29 07:08:50,770 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 406 transitions. [2023-11-29 07:08:50,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 406 transitions. [2023-11-29 07:08:50,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:50,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 406 transitions. [2023-11-29 07:08:50,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 07:08:50,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 07:08:50,773 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 07:08:50,773 INFO L175 Difference]: Start difference. First operand has 130 places, 120 transitions, 449 flow. Second operand 4 states and 406 transitions. [2023-11-29 07:08:50,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 159 transitions, 818 flow [2023-11-29 07:08:50,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 159 transitions, 813 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 07:08:50,785 INFO L231 Difference]: Finished difference. Result has 132 places, 120 transitions, 453 flow [2023-11-29 07:08:50,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=132, PETRI_TRANSITIONS=120} [2023-11-29 07:08:50,785 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 9 predicate places. [2023-11-29 07:08:50,785 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 120 transitions, 453 flow [2023-11-29 07:08:50,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 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 07:08:50,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:50,786 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:50,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 07:08:50,786 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:50,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:50,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1749880020, now seen corresponding path program 2 times [2023-11-29 07:08:50,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:50,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484804054] [2023-11-29 07:08:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:50,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:08:51,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:51,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484804054] [2023-11-29 07:08:51,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484804054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:51,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:51,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:08:51,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561887010] [2023-11-29 07:08:51,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:51,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:08:51,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:08:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:08:51,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 139 [2023-11-29 07:08:51,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 120 transitions, 453 flow. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 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 07:08:51,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:51,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 139 [2023-11-29 07:08:51,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:54,319 INFO L124 PetriNetUnfolderBase]: 10572/20321 cut-off events. [2023-11-29 07:08:54,319 INFO L125 PetriNetUnfolderBase]: For 13541/13799 co-relation queries the response was YES. [2023-11-29 07:08:54,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44822 conditions, 20321 events. 10572/20321 cut-off events. For 13541/13799 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 152264 event pairs, 6403 based on Foata normal form. 8/17705 useless extension candidates. Maximal degree in co-relation 44801. Up to 14739 conditions per place. [2023-11-29 07:08:54,452 INFO L140 encePairwiseOnDemand]: 135/139 looper letters, 107 selfloop transitions, 1 changer transitions 7/157 dead transitions. [2023-11-29 07:08:54,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 157 transitions, 817 flow [2023-11-29 07:08:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:08:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 07:08:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 404 transitions. [2023-11-29 07:08:54,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7266187050359713 [2023-11-29 07:08:54,454 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 404 transitions. [2023-11-29 07:08:54,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 404 transitions. [2023-11-29 07:08:54,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:54,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 404 transitions. [2023-11-29 07:08:54,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 07:08:54,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 07:08:54,457 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 07:08:54,457 INFO L175 Difference]: Start difference. First operand has 132 places, 120 transitions, 453 flow. Second operand 4 states and 404 transitions. [2023-11-29 07:08:54,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 157 transitions, 817 flow [2023-11-29 07:08:54,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 157 transitions, 811 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 07:08:54,472 INFO L231 Difference]: Finished difference. Result has 134 places, 120 transitions, 459 flow [2023-11-29 07:08:54,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=459, PETRI_PLACES=134, PETRI_TRANSITIONS=120} [2023-11-29 07:08:54,473 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 11 predicate places. [2023-11-29 07:08:54,473 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 120 transitions, 459 flow [2023-11-29 07:08:54,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 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 07:08:54,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:54,473 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:54,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 07:08:54,474 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:54,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:54,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1268739980, now seen corresponding path program 1 times [2023-11-29 07:08:54,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:54,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405847203] [2023-11-29 07:08:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:54,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:08:54,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:54,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405847203] [2023-11-29 07:08:54,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405847203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:54,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:54,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:08:54,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100056476] [2023-11-29 07:08:54,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:54,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:08:54,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:54,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:08:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:08:54,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 139 [2023-11-29 07:08:54,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 120 transitions, 459 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 07:08:54,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:54,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 139 [2023-11-29 07:08:54,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:57,251 INFO L124 PetriNetUnfolderBase]: 9870/18998 cut-off events. [2023-11-29 07:08:57,252 INFO L125 PetriNetUnfolderBase]: For 13811/14057 co-relation queries the response was YES. [2023-11-29 07:08:57,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41989 conditions, 18998 events. 9870/18998 cut-off events. For 13811/14057 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 141119 event pairs, 3714 based on Foata normal form. 151/16644 useless extension candidates. Maximal degree in co-relation 41967. Up to 14143 conditions per place. [2023-11-29 07:08:57,368 INFO L140 encePairwiseOnDemand]: 135/139 looper letters, 81 selfloop transitions, 2 changer transitions 5/130 dead transitions. [2023-11-29 07:08:57,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 130 transitions, 676 flow [2023-11-29 07:08:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:08:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 07:08:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-11-29 07:08:57,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7314148681055156 [2023-11-29 07:08:57,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-11-29 07:08:57,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-11-29 07:08:57,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:08:57,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-11-29 07:08:57,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 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 07:08:57,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:08:57,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:08:57,371 INFO L175 Difference]: Start difference. First operand has 134 places, 120 transitions, 459 flow. Second operand 3 states and 305 transitions. [2023-11-29 07:08:57,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 130 transitions, 676 flow [2023-11-29 07:08:57,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 130 transitions, 673 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 07:08:57,383 INFO L231 Difference]: Finished difference. Result has 134 places, 120 transitions, 477 flow [2023-11-29 07:08:57,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=477, PETRI_PLACES=134, PETRI_TRANSITIONS=120} [2023-11-29 07:08:57,384 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 11 predicate places. [2023-11-29 07:08:57,384 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 120 transitions, 477 flow [2023-11-29 07:08:57,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 07:08:57,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:08:57,385 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:57,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 07:08:57,385 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:08:57,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:57,385 INFO L85 PathProgramCache]: Analyzing trace with hash -98983821, now seen corresponding path program 1 times [2023-11-29 07:08:57,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:08:57,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123798249] [2023-11-29 07:08:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:57,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:08:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:08:57,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:08:57,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123798249] [2023-11-29 07:08:57,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123798249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:57,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:57,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:08:57,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304895921] [2023-11-29 07:08:57,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:57,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:08:57,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:08:57,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:08:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:08:57,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 139 [2023-11-29 07:08:57,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 120 transitions, 477 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 07:08:57,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:08:57,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 139 [2023-11-29 07:08:57,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:08:59,951 INFO L124 PetriNetUnfolderBase]: 9100/17933 cut-off events. [2023-11-29 07:08:59,951 INFO L125 PetriNetUnfolderBase]: For 13720/13984 co-relation queries the response was YES. [2023-11-29 07:09:00,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39742 conditions, 17933 events. 9100/17933 cut-off events. For 13720/13984 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 135753 event pairs, 5146 based on Foata normal form. 82/15638 useless extension candidates. Maximal degree in co-relation 39721. Up to 11222 conditions per place. [2023-11-29 07:09:00,069 INFO L140 encePairwiseOnDemand]: 136/139 looper letters, 113 selfloop transitions, 3 changer transitions 0/158 dead transitions. [2023-11-29 07:09:00,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 158 transitions, 856 flow [2023-11-29 07:09:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:09:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 07:09:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2023-11-29 07:09:00,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7745803357314148 [2023-11-29 07:09:00,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2023-11-29 07:09:00,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2023-11-29 07:09:00,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:09:00,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2023-11-29 07:09:00,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 07:09:00,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:09:00,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:09:00,073 INFO L175 Difference]: Start difference. First operand has 134 places, 120 transitions, 477 flow. Second operand 3 states and 323 transitions. [2023-11-29 07:09:00,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 158 transitions, 856 flow [2023-11-29 07:09:00,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 158 transitions, 846 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-29 07:09:00,090 INFO L231 Difference]: Finished difference. Result has 133 places, 121 transitions, 484 flow [2023-11-29 07:09:00,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=484, PETRI_PLACES=133, PETRI_TRANSITIONS=121} [2023-11-29 07:09:00,091 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 10 predicate places. [2023-11-29 07:09:00,091 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 121 transitions, 484 flow [2023-11-29 07:09:00,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 07:09:00,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:09:00,091 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:09:00,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 07:09:00,091 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:09:00,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:09:00,092 INFO L85 PathProgramCache]: Analyzing trace with hash 212961856, now seen corresponding path program 1 times [2023-11-29 07:09:00,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:09:00,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961514565] [2023-11-29 07:09:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:00,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:09:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 07:09:00,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:09:00,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961514565] [2023-11-29 07:09:00,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961514565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:09:00,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816134460] [2023-11-29 07:09:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:00,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:09:00,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:09:00,496 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:09:00,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 07:09:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:00,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:09:00,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:09:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:09:00,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:09:00,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816134460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:09:00,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:09:00,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-11-29 07:09:00,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594062280] [2023-11-29 07:09:00,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:09:00,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:09:00,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:09:00,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:09:00,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:09:00,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-29 07:09:00,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 121 transitions, 484 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 07:09:00,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:09:00,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-29 07:09:00,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:09:04,106 INFO L124 PetriNetUnfolderBase]: 12372/22145 cut-off events. [2023-11-29 07:09:04,107 INFO L125 PetriNetUnfolderBase]: For 16382/16734 co-relation queries the response was YES. [2023-11-29 07:09:04,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51178 conditions, 22145 events. 12372/22145 cut-off events. For 16382/16734 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 159852 event pairs, 5661 based on Foata normal form. 0/19408 useless extension candidates. Maximal degree in co-relation 51157. Up to 12619 conditions per place. [2023-11-29 07:09:04,308 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 213 selfloop transitions, 9 changer transitions 0/260 dead transitions. [2023-11-29 07:09:04,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 260 transitions, 1495 flow [2023-11-29 07:09:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:09:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 07:09:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 617 transitions. [2023-11-29 07:09:04,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7398081534772182 [2023-11-29 07:09:04,310 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 617 transitions. [2023-11-29 07:09:04,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 617 transitions. [2023-11-29 07:09:04,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:09:04,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 617 transitions. [2023-11-29 07:09:04,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.83333333333333) internal successors, (617), 6 states have internal predecessors, (617), 0 states have call successors, (0), 0 states 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 07:09:04,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:09:04,315 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:09:04,315 INFO L175 Difference]: Start difference. First operand has 133 places, 121 transitions, 484 flow. Second operand 6 states and 617 transitions. [2023-11-29 07:09:04,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 260 transitions, 1495 flow [2023-11-29 07:09:04,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 260 transitions, 1484 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 07:09:04,340 INFO L231 Difference]: Finished difference. Result has 140 places, 127 transitions, 535 flow [2023-11-29 07:09:04,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=535, PETRI_PLACES=140, PETRI_TRANSITIONS=127} [2023-11-29 07:09:04,341 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 17 predicate places. [2023-11-29 07:09:04,341 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 127 transitions, 535 flow [2023-11-29 07:09:04,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 07:09:04,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:09:04,342 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:09:04,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 07:09:04,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:09:04,543 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:09:04,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:09:04,543 INFO L85 PathProgramCache]: Analyzing trace with hash -920483314, now seen corresponding path program 1 times [2023-11-29 07:09:04,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:09:04,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605902318] [2023-11-29 07:09:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:04,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:09:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:09:04,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:09:04,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605902318] [2023-11-29 07:09:04,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605902318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:09:04,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:09:04,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:09:04,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270160819] [2023-11-29 07:09:04,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:09:04,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:09:04,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:09:04,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:09:04,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:09:04,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-29 07:09:04,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 127 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 07:09:04,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:09:04,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-29 07:09:04,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:09:08,270 INFO L124 PetriNetUnfolderBase]: 14966/25553 cut-off events. [2023-11-29 07:09:08,271 INFO L125 PetriNetUnfolderBase]: For 20713/21389 co-relation queries the response was YES. [2023-11-29 07:09:08,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62984 conditions, 25553 events. 14966/25553 cut-off events. For 20713/21389 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 181989 event pairs, 3572 based on Foata normal form. 24/23610 useless extension candidates. Maximal degree in co-relation 62961. Up to 9044 conditions per place. [2023-11-29 07:09:08,483 INFO L140 encePairwiseOnDemand]: 130/139 looper letters, 203 selfloop transitions, 15 changer transitions 0/257 dead transitions. [2023-11-29 07:09:08,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 257 transitions, 1510 flow [2023-11-29 07:09:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:09:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 07:09:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 607 transitions. [2023-11-29 07:09:08,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7278177458033573 [2023-11-29 07:09:08,485 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 607 transitions. [2023-11-29 07:09:08,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 607 transitions. [2023-11-29 07:09:08,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:09:08,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 607 transitions. [2023-11-29 07:09:08,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 101.16666666666667) internal successors, (607), 6 states have internal predecessors, (607), 0 states have call successors, (0), 0 states 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 07:09:08,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:09:08,488 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:09:08,488 INFO L175 Difference]: Start difference. First operand has 140 places, 127 transitions, 535 flow. Second operand 6 states and 607 transitions. [2023-11-29 07:09:08,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 257 transitions, 1510 flow [2023-11-29 07:09:08,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 257 transitions, 1510 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 07:09:08,520 INFO L231 Difference]: Finished difference. Result has 148 places, 132 transitions, 607 flow [2023-11-29 07:09:08,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=607, PETRI_PLACES=148, PETRI_TRANSITIONS=132} [2023-11-29 07:09:08,521 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 25 predicate places. [2023-11-29 07:09:08,521 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 132 transitions, 607 flow [2023-11-29 07:09:08,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 07:09:08,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:09:08,521 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:09:08,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 07:09:08,521 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:09:08,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:09:08,522 INFO L85 PathProgramCache]: Analyzing trace with hash -531733300, now seen corresponding path program 1 times [2023-11-29 07:09:08,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:09:08,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438990462] [2023-11-29 07:09:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:08,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:09:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 07:09:08,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:09:08,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438990462] [2023-11-29 07:09:08,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438990462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:09:08,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14249461] [2023-11-29 07:09:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:08,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:09:08,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:09:08,965 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:09:08,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 07:09:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:09,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:09:09,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:09:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:09:09,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:09:09,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14249461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:09:09,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:09:09,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-11-29 07:09:09,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576648424] [2023-11-29 07:09:09,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:09:09,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:09:09,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:09:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:09:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:09:09,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 139 [2023-11-29 07:09:09,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 132 transitions, 607 flow. Second operand has 5 states, 5 states have (on average 81.2) internal successors, (406), 5 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 07:09:09,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:09:09,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 139 [2023-11-29 07:09:09,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:09:13,733 INFO L124 PetriNetUnfolderBase]: 15502/28749 cut-off events. [2023-11-29 07:09:13,733 INFO L125 PetriNetUnfolderBase]: For 30709/31195 co-relation queries the response was YES. [2023-11-29 07:09:13,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76365 conditions, 28749 events. 15502/28749 cut-off events. For 30709/31195 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 227103 event pairs, 6276 based on Foata normal form. 250/26930 useless extension candidates. Maximal degree in co-relation 76339. Up to 14088 conditions per place. [2023-11-29 07:09:13,961 INFO L140 encePairwiseOnDemand]: 130/139 looper letters, 245 selfloop transitions, 16 changer transitions 0/301 dead transitions. [2023-11-29 07:09:13,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 301 transitions, 1886 flow [2023-11-29 07:09:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:09:13,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 07:09:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 713 transitions. [2023-11-29 07:09:13,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7327852004110997 [2023-11-29 07:09:13,963 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 713 transitions. [2023-11-29 07:09:13,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 713 transitions. [2023-11-29 07:09:13,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:09:13,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 713 transitions. [2023-11-29 07:09:13,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 101.85714285714286) internal successors, (713), 7 states have internal predecessors, (713), 0 states have call successors, (0), 0 states 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 07:09:13,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 139.0) internal successors, (1112), 8 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states 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 07:09:13,965 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 139.0) internal successors, (1112), 8 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states 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 07:09:13,966 INFO L175 Difference]: Start difference. First operand has 148 places, 132 transitions, 607 flow. Second operand 7 states and 713 transitions. [2023-11-29 07:09:13,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 301 transitions, 1886 flow [2023-11-29 07:09:14,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 301 transitions, 1884 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 07:09:14,050 INFO L231 Difference]: Finished difference. Result has 157 places, 139 transitions, 721 flow [2023-11-29 07:09:14,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=721, PETRI_PLACES=157, PETRI_TRANSITIONS=139} [2023-11-29 07:09:14,050 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 34 predicate places. [2023-11-29 07:09:14,050 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 139 transitions, 721 flow [2023-11-29 07:09:14,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.2) internal successors, (406), 5 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 07:09:14,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:09:14,051 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:09:14,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 07:09:14,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:09:14,252 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:09:14,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:09:14,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2014607963, now seen corresponding path program 1 times [2023-11-29 07:09:14,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:09:14,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101593060] [2023-11-29 07:09:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:14,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:09:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 07:09:14,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:09:14,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101593060] [2023-11-29 07:09:14,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101593060] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:09:14,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136163594] [2023-11-29 07:09:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:14,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:09:14,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:09:14,535 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:09:14,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 07:09:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:14,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 07:09:14,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:09:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:09:14,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:09:14,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136163594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:09:14,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:09:14,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2023-11-29 07:09:14,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425015778] [2023-11-29 07:09:14,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:09:14,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:09:14,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:09:14,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:09:14,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-29 07:09:14,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 139 [2023-11-29 07:09:14,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 139 transitions, 721 flow. Second operand has 6 states, 6 states have (on average 80.5) internal successors, (483), 6 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 07:09:14,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:09:14,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 139 [2023-11-29 07:09:14,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:09:20,270 INFO L124 PetriNetUnfolderBase]: 19195/35460 cut-off events. [2023-11-29 07:09:20,270 INFO L125 PetriNetUnfolderBase]: For 50515/51251 co-relation queries the response was YES. [2023-11-29 07:09:20,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97319 conditions, 35460 events. 19195/35460 cut-off events. For 50515/51251 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 288227 event pairs, 8961 based on Foata normal form. 392/33043 useless extension candidates. Maximal degree in co-relation 97289. Up to 19217 conditions per place. [2023-11-29 07:09:20,580 INFO L140 encePairwiseOnDemand]: 131/139 looper letters, 247 selfloop transitions, 12 changer transitions 0/302 dead transitions. [2023-11-29 07:09:20,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 302 transitions, 1959 flow [2023-11-29 07:09:20,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:09:20,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 07:09:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 713 transitions. [2023-11-29 07:09:20,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7327852004110997 [2023-11-29 07:09:20,582 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 713 transitions. [2023-11-29 07:09:20,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 713 transitions. [2023-11-29 07:09:20,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:09:20,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 713 transitions. [2023-11-29 07:09:20,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 101.85714285714286) internal successors, (713), 7 states have internal predecessors, (713), 0 states have call successors, (0), 0 states 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 07:09:20,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 139.0) internal successors, (1112), 8 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states 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 07:09:20,584 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 139.0) internal successors, (1112), 8 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states 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 07:09:20,585 INFO L175 Difference]: Start difference. First operand has 157 places, 139 transitions, 721 flow. Second operand 7 states and 713 transitions. [2023-11-29 07:09:20,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 302 transitions, 1959 flow [2023-11-29 07:09:20,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 302 transitions, 1954 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 07:09:20,675 INFO L231 Difference]: Finished difference. Result has 164 places, 140 transitions, 751 flow [2023-11-29 07:09:20,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=751, PETRI_PLACES=164, PETRI_TRANSITIONS=140} [2023-11-29 07:09:20,675 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 41 predicate places. [2023-11-29 07:09:20,676 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 140 transitions, 751 flow [2023-11-29 07:09:20,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.5) internal successors, (483), 6 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 07:09:20,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:09:20,676 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:09:20,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 07:09:20,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 07:09:20,877 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:09:20,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:09:20,877 INFO L85 PathProgramCache]: Analyzing trace with hash 831656386, now seen corresponding path program 1 times [2023-11-29 07:09:20,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:09:20,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781016403] [2023-11-29 07:09:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:20,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:09:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:09:21,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:09:21,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781016403] [2023-11-29 07:09:21,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781016403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:09:21,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:09:21,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 07:09:21,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278484503] [2023-11-29 07:09:21,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:09:21,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:09:21,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:09:21,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:09:21,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:09:21,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-29 07:09:21,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 140 transitions, 751 flow. Second operand has 6 states, 6 states have (on average 79.5) internal successors, (477), 6 states have internal predecessors, (477), 0 states have call successors, (0), 0 states 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 07:09:21,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:09:21,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-29 07:09:21,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:09:27,401 INFO L124 PetriNetUnfolderBase]: 23067/40634 cut-off events. [2023-11-29 07:09:27,401 INFO L125 PetriNetUnfolderBase]: For 61459/62441 co-relation queries the response was YES. [2023-11-29 07:09:27,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114534 conditions, 40634 events. 23067/40634 cut-off events. For 61459/62441 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 323856 event pairs, 9689 based on Foata normal form. 444/38845 useless extension candidates. Maximal degree in co-relation 114501. Up to 20453 conditions per place. [2023-11-29 07:09:27,780 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 215 selfloop transitions, 12 changer transitions 0/268 dead transitions. [2023-11-29 07:09:27,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 268 transitions, 1766 flow [2023-11-29 07:09:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:09:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 07:09:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 606 transitions. [2023-11-29 07:09:27,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7266187050359713 [2023-11-29 07:09:27,782 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 606 transitions. [2023-11-29 07:09:27,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 606 transitions. [2023-11-29 07:09:27,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:09:27,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 606 transitions. [2023-11-29 07:09:27,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states 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 07:09:27,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:09:27,784 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:09:27,784 INFO L175 Difference]: Start difference. First operand has 164 places, 140 transitions, 751 flow. Second operand 6 states and 606 transitions. [2023-11-29 07:09:27,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 268 transitions, 1766 flow [2023-11-29 07:09:27,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 268 transitions, 1734 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-29 07:09:27,907 INFO L231 Difference]: Finished difference. Result has 168 places, 142 transitions, 800 flow [2023-11-29 07:09:27,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=800, PETRI_PLACES=168, PETRI_TRANSITIONS=142} [2023-11-29 07:09:27,907 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 45 predicate places. [2023-11-29 07:09:27,907 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 142 transitions, 800 flow [2023-11-29 07:09:27,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.5) internal successors, (477), 6 states have internal predecessors, (477), 0 states have call successors, (0), 0 states 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 07:09:27,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:09:27,908 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:09:27,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-29 07:09:27,908 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:09:27,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:09:27,908 INFO L85 PathProgramCache]: Analyzing trace with hash 616601296, now seen corresponding path program 1 times [2023-11-29 07:09:27,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:09:27,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327529010] [2023-11-29 07:09:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:27,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:09:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:09:27,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:09:27,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327529010] [2023-11-29 07:09:27,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327529010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:09:27,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:09:27,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:09:27,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735444149] [2023-11-29 07:09:27,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:09:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:09:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:09:27,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:09:27,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:09:27,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-29 07:09:27,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 142 transitions, 800 flow. Second operand has 5 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 07:09:27,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:09:27,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-29 07:09:27,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:09:34,312 INFO L124 PetriNetUnfolderBase]: 22844/40053 cut-off events. [2023-11-29 07:09:34,313 INFO L125 PetriNetUnfolderBase]: For 69181/70161 co-relation queries the response was YES. [2023-11-29 07:09:34,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116715 conditions, 40053 events. 22844/40053 cut-off events. For 69181/70161 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 315316 event pairs, 9136 based on Foata normal form. 600/38966 useless extension candidates. Maximal degree in co-relation 116679. Up to 18492 conditions per place. [2023-11-29 07:09:34,876 INFO L140 encePairwiseOnDemand]: 130/139 looper letters, 175 selfloop transitions, 21 changer transitions 0/237 dead transitions. [2023-11-29 07:09:34,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 237 transitions, 1590 flow [2023-11-29 07:09:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:09:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 07:09:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 508 transitions. [2023-11-29 07:09:34,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7309352517985611 [2023-11-29 07:09:34,877 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 508 transitions. [2023-11-29 07:09:34,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 508 transitions. [2023-11-29 07:09:34,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:09:34,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 508 transitions. [2023-11-29 07:09:34,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 0 states have call successors, (0), 0 states 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 07:09:34,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 07:09:34,879 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 07:09:34,879 INFO L175 Difference]: Start difference. First operand has 168 places, 142 transitions, 800 flow. Second operand 5 states and 508 transitions. [2023-11-29 07:09:34,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 237 transitions, 1590 flow [2023-11-29 07:09:35,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 237 transitions, 1564 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 07:09:35,110 INFO L231 Difference]: Finished difference. Result has 170 places, 142 transitions, 820 flow [2023-11-29 07:09:35,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=820, PETRI_PLACES=170, PETRI_TRANSITIONS=142} [2023-11-29 07:09:35,111 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 47 predicate places. [2023-11-29 07:09:35,111 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 142 transitions, 820 flow [2023-11-29 07:09:35,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 07:09:35,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:09:35,111 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:09:35,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-29 07:09:35,111 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:09:35,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:09:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash 646214212, now seen corresponding path program 1 times [2023-11-29 07:09:35,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:09:35,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311225333] [2023-11-29 07:09:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:35,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:09:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 07:09:35,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:09:35,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311225333] [2023-11-29 07:09:35,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311225333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:09:35,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226417607] [2023-11-29 07:09:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:35,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:09:35,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:09:35,483 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:09:35,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 07:09:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:35,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 07:09:35,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:09:35,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 07:09:35,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:09:35,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:09:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:09:35,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:09:35,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:09:35,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 07:09:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:09:35,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 07:09:35,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:09:35,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 07:09:35,837 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 07:09:35,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-29 07:09:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 07:09:36,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:09:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 07:09:36,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226417607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:09:36,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:09:36,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 9] total 25 [2023-11-29 07:09:36,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752489529] [2023-11-29 07:09:36,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:09:36,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 07:09:36,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:09:36,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 07:09:36,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2023-11-29 07:09:39,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 139 [2023-11-29 07:09:39,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 142 transitions, 820 flow. Second operand has 27 states, 27 states have (on average 74.81481481481481) internal successors, (2020), 27 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states 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 07:09:39,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:09:39,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 139 [2023-11-29 07:09:39,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:09:52,786 INFO L124 PetriNetUnfolderBase]: 39632/73511 cut-off events. [2023-11-29 07:09:52,786 INFO L125 PetriNetUnfolderBase]: For 159805/162235 co-relation queries the response was YES. [2023-11-29 07:09:53,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226787 conditions, 73511 events. 39632/73511 cut-off events. For 159805/162235 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 628016 event pairs, 4834 based on Foata normal form. 750/72720 useless extension candidates. Maximal degree in co-relation 226751. Up to 13588 conditions per place. [2023-11-29 07:09:53,544 INFO L140 encePairwiseOnDemand]: 128/139 looper letters, 306 selfloop transitions, 31 changer transitions 0/380 dead transitions. [2023-11-29 07:09:53,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 380 transitions, 2786 flow [2023-11-29 07:09:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 07:09:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 07:09:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1451 transitions. [2023-11-29 07:09:53,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6140499365213712 [2023-11-29 07:09:53,547 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1451 transitions. [2023-11-29 07:09:53,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1451 transitions. [2023-11-29 07:09:53,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:09:53,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1451 transitions. [2023-11-29 07:09:53,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 85.3529411764706) internal successors, (1451), 17 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states 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 07:09:53,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 139.0) internal successors, (2502), 18 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states 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 07:09:53,551 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 139.0) internal successors, (2502), 18 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states 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 07:09:53,551 INFO L175 Difference]: Start difference. First operand has 170 places, 142 transitions, 820 flow. Second operand 17 states and 1451 transitions. [2023-11-29 07:09:53,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 380 transitions, 2786 flow [2023-11-29 07:09:54,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 380 transitions, 2719 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-11-29 07:09:54,118 INFO L231 Difference]: Finished difference. Result has 187 places, 153 transitions, 1068 flow [2023-11-29 07:09:54,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1068, PETRI_PLACES=187, PETRI_TRANSITIONS=153} [2023-11-29 07:09:54,119 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 64 predicate places. [2023-11-29 07:09:54,119 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 153 transitions, 1068 flow [2023-11-29 07:09:54,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 74.81481481481481) internal successors, (2020), 27 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states 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 07:09:54,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:09:54,120 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:09:54,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 07:09:54,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 07:09:54,321 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:09:54,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:09:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1446301569, now seen corresponding path program 1 times [2023-11-29 07:09:54,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:09:54,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561355337] [2023-11-29 07:09:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:54,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:09:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 07:09:54,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:09:54,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561355337] [2023-11-29 07:09:54,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561355337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:09:54,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418855640] [2023-11-29 07:09:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:54,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:09:54,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:09:54,631 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:09:54,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 07:09:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:54,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:09:54,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:09:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 07:09:54,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:09:54,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418855640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:09:54,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:09:54,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-29 07:09:54,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064691911] [2023-11-29 07:09:54,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:09:54,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:09:54,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:09:54,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:09:54,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-29 07:09:54,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-29 07:09:54,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 153 transitions, 1068 flow. Second operand has 5 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 07:09:54,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:09:54,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-29 07:09:54,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:10:10,753 INFO L124 PetriNetUnfolderBase]: 47365/88609 cut-off events. [2023-11-29 07:10:10,753 INFO L125 PetriNetUnfolderBase]: For 237887/240307 co-relation queries the response was YES. [2023-11-29 07:10:11,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265524 conditions, 88609 events. 47365/88609 cut-off events. For 237887/240307 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 773518 event pairs, 28747 based on Foata normal form. 864/84352 useless extension candidates. Maximal degree in co-relation 265484. Up to 52813 conditions per place. [2023-11-29 07:10:11,774 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 354 selfloop transitions, 9 changer transitions 0/404 dead transitions. [2023-11-29 07:10:11,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 404 transitions, 4280 flow [2023-11-29 07:10:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:10:11,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 07:10:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 617 transitions. [2023-11-29 07:10:11,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7398081534772182 [2023-11-29 07:10:11,776 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 617 transitions. [2023-11-29 07:10:11,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 617 transitions. [2023-11-29 07:10:11,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:10:11,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 617 transitions. [2023-11-29 07:10:11,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.83333333333333) internal successors, (617), 6 states have internal predecessors, (617), 0 states have call successors, (0), 0 states 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 07:10:11,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:10:11,778 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:10:11,778 INFO L175 Difference]: Start difference. First operand has 187 places, 153 transitions, 1068 flow. Second operand 6 states and 617 transitions. [2023-11-29 07:10:11,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 404 transitions, 4280 flow [2023-11-29 07:10:12,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 404 transitions, 4233 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-29 07:10:12,370 INFO L231 Difference]: Finished difference. Result has 183 places, 158 transitions, 1093 flow [2023-11-29 07:10:12,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1093, PETRI_PLACES=183, PETRI_TRANSITIONS=158} [2023-11-29 07:10:12,370 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 60 predicate places. [2023-11-29 07:10:12,370 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 158 transitions, 1093 flow [2023-11-29 07:10:12,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 07:10:12,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:10:12,371 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:10:12,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 07:10:12,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_537956b9-a771-4b90-b71e-ec6dd1b99da5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 07:10:12,572 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:10:12,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:10:12,572 INFO L85 PathProgramCache]: Analyzing trace with hash 417584664, now seen corresponding path program 1 times [2023-11-29 07:10:12,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:10:12,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210131828] [2023-11-29 07:10:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:10:12,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:10:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:10:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 07:10:12,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:10:12,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210131828] [2023-11-29 07:10:12,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210131828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:10:12,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:10:12,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:10:12,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414490242] [2023-11-29 07:10:12,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:10:12,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:10:12,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:10:12,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:10:12,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:10:12,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-29 07:10:12,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 158 transitions, 1093 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states 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 07:10:12,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:10:12,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-29 07:10:12,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:10:31,044 INFO L124 PetriNetUnfolderBase]: 54400/99576 cut-off events. [2023-11-29 07:10:31,044 INFO L125 PetriNetUnfolderBase]: For 299229/303189 co-relation queries the response was YES. [2023-11-29 07:10:32,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310376 conditions, 99576 events. 54400/99576 cut-off events. For 299229/303189 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 868902 event pairs, 19845 based on Foata normal form. 2068/98021 useless extension candidates. Maximal degree in co-relation 310334. Up to 32635 conditions per place. [2023-11-29 07:10:32,359 INFO L140 encePairwiseOnDemand]: 130/139 looper letters, 343 selfloop transitions, 15 changer transitions 0/400 dead transitions. [2023-11-29 07:10:32,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 400 transitions, 4251 flow [2023-11-29 07:10:32,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:10:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 07:10:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 607 transitions. [2023-11-29 07:10:32,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7278177458033573 [2023-11-29 07:10:32,360 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 607 transitions. [2023-11-29 07:10:32,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 607 transitions. [2023-11-29 07:10:32,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:10:32,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 607 transitions. [2023-11-29 07:10:32,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 101.16666666666667) internal successors, (607), 6 states have internal predecessors, (607), 0 states have call successors, (0), 0 states 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 07:10:32,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:10:32,362 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:10:32,362 INFO L175 Difference]: Start difference. First operand has 183 places, 158 transitions, 1093 flow. Second operand 6 states and 607 transitions. [2023-11-29 07:10:32,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 400 transitions, 4251 flow [2023-11-29 07:10:32,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 400 transitions, 4251 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 07:10:32,839 INFO L231 Difference]: Finished difference. Result has 191 places, 163 transitions, 1165 flow [2023-11-29 07:10:32,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1165, PETRI_PLACES=191, PETRI_TRANSITIONS=163} [2023-11-29 07:10:32,839 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 68 predicate places. [2023-11-29 07:10:32,839 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 163 transitions, 1165 flow [2023-11-29 07:10:32,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states 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 07:10:32,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:10:32,840 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:10:32,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-29 07:10:32,840 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:10:32,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:10:32,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1378028630, now seen corresponding path program 1 times [2023-11-29 07:10:32,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:10:32,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397310106] [2023-11-29 07:10:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:10:32,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:10:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:10:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-29 07:10:32,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:10:32,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397310106] [2023-11-29 07:10:32,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397310106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:10:32,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:10:32,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 07:10:32,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802746480] [2023-11-29 07:10:32,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:10:32,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:10:32,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:10:32,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:10:32,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:10:33,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-29 07:10:33,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 163 transitions, 1165 flow. Second operand has 6 states, 6 states have (on average 79.66666666666667) internal successors, (478), 6 states have internal predecessors, (478), 0 states have call successors, (0), 0 states 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 07:10:33,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:10:33,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-29 07:10:33,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:10:54,495 INFO L124 PetriNetUnfolderBase]: 58839/110806 cut-off events. [2023-11-29 07:10:54,495 INFO L125 PetriNetUnfolderBase]: For 373450/378234 co-relation queries the response was YES. [2023-11-29 07:10:55,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363174 conditions, 110806 events. 58839/110806 cut-off events. For 373450/378234 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 1019897 event pairs, 33201 based on Foata normal form. 3978/112411 useless extension candidates. Maximal degree in co-relation 363129. Up to 63187 conditions per place. [2023-11-29 07:10:55,935 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 354 selfloop transitions, 10 changer transitions 0/407 dead transitions. [2023-11-29 07:10:55,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 407 transitions, 4348 flow [2023-11-29 07:10:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:10:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 07:10:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 611 transitions. [2023-11-29 07:10:55,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7326139088729017 [2023-11-29 07:10:55,936 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 611 transitions. [2023-11-29 07:10:55,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 611 transitions. [2023-11-29 07:10:55,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:10:55,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 611 transitions. [2023-11-29 07:10:55,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 101.83333333333333) internal successors, (611), 6 states have internal predecessors, (611), 0 states have call successors, (0), 0 states 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 07:10:55,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:10:55,938 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 07:10:55,938 INFO L175 Difference]: Start difference. First operand has 191 places, 163 transitions, 1165 flow. Second operand 6 states and 611 transitions. [2023-11-29 07:10:55,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 407 transitions, 4348 flow [2023-11-29 07:10:56,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 407 transitions, 4346 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 07:10:56,820 INFO L231 Difference]: Finished difference. Result has 198 places, 164 transitions, 1211 flow [2023-11-29 07:10:56,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1211, PETRI_PLACES=198, PETRI_TRANSITIONS=164} [2023-11-29 07:10:56,821 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 75 predicate places. [2023-11-29 07:10:56,821 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 164 transitions, 1211 flow [2023-11-29 07:10:56,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.66666666666667) internal successors, (478), 6 states have internal predecessors, (478), 0 states have call successors, (0), 0 states 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 07:10:56,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:10:56,822 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:10:56,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-29 07:10:56,822 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:10:56,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:10:56,822 INFO L85 PathProgramCache]: Analyzing trace with hash 263687545, now seen corresponding path program 1 times [2023-11-29 07:10:56,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:10:56,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050128666] [2023-11-29 07:10:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:10:56,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:10:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:10:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 07:10:56,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:10:56,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050128666] [2023-11-29 07:10:56,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050128666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:10:56,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:10:56,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:10:56,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226481390] [2023-11-29 07:10:56,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:10:56,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:10:56,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:10:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:10:56,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:10:56,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 139 [2023-11-29 07:10:56,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 164 transitions, 1211 flow. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 07:10:56,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:10:56,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 139 [2023-11-29 07:10:56,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:11:16,997 INFO L124 PetriNetUnfolderBase]: 50932/99823 cut-off events. [2023-11-29 07:11:16,997 INFO L125 PetriNetUnfolderBase]: For 361816/366302 co-relation queries the response was YES. [2023-11-29 07:11:18,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345599 conditions, 99823 events. 50932/99823 cut-off events. For 361816/366302 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 945728 event pairs, 38402 based on Foata normal form. 2762/102312 useless extension candidates. Maximal degree in co-relation 345550. Up to 75042 conditions per place. [2023-11-29 07:11:18,535 INFO L140 encePairwiseOnDemand]: 136/139 looper letters, 158 selfloop transitions, 5 changer transitions 0/210 dead transitions. [2023-11-29 07:11:18,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 210 transitions, 1828 flow [2023-11-29 07:11:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:11:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 07:11:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 322 transitions. [2023-11-29 07:11:18,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7721822541966427 [2023-11-29 07:11:18,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 322 transitions. [2023-11-29 07:11:18,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 322 transitions. [2023-11-29 07:11:18,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:11:18,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 322 transitions. [2023-11-29 07:11:18,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 07:11:18,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:11:18,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 07:11:18,538 INFO L175 Difference]: Start difference. First operand has 198 places, 164 transitions, 1211 flow. Second operand 3 states and 322 transitions. [2023-11-29 07:11:18,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 210 transitions, 1828 flow [2023-11-29 07:11:19,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 210 transitions, 1807 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 07:11:19,552 INFO L231 Difference]: Finished difference. Result has 199 places, 164 transitions, 1217 flow [2023-11-29 07:11:19,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1217, PETRI_PLACES=199, PETRI_TRANSITIONS=164} [2023-11-29 07:11:19,553 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 76 predicate places. [2023-11-29 07:11:19,553 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 164 transitions, 1217 flow [2023-11-29 07:11:19,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 07:11:19,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:11:19,553 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:11:19,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-29 07:11:19,553 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:11:19,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:11:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 686979088, now seen corresponding path program 1 times [2023-11-29 07:11:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:11:19,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963434882] [2023-11-29 07:11:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:11:19,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:11:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:11:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 07:11:19,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:11:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963434882] [2023-11-29 07:11:19,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963434882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:11:19,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:11:19,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:11:19,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354648085] [2023-11-29 07:11:19,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:11:19,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:11:19,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:11:19,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:11:19,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:11:19,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 139 [2023-11-29 07:11:19,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 164 transitions, 1217 flow. Second operand has 5 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 states 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 07:11:19,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:11:19,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 139 [2023-11-29 07:11:19,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:11:41,457 INFO L124 PetriNetUnfolderBase]: 56997/109024 cut-off events. [2023-11-29 07:11:41,458 INFO L125 PetriNetUnfolderBase]: For 390790/394925 co-relation queries the response was YES. [2023-11-29 07:11:42,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368913 conditions, 109024 events. 56997/109024 cut-off events. For 390790/394925 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 1013921 event pairs, 29260 based on Foata normal form. 4021/112166 useless extension candidates. Maximal degree in co-relation 368863. Up to 49204 conditions per place. [2023-11-29 07:11:42,874 INFO L140 encePairwiseOnDemand]: 130/139 looper letters, 284 selfloop transitions, 15 changer transitions 0/342 dead transitions. [2023-11-29 07:11:42,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 342 transitions, 3680 flow [2023-11-29 07:11:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:11:42,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 07:11:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 507 transitions. [2023-11-29 07:11:42,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7294964028776978 [2023-11-29 07:11:42,876 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 507 transitions. [2023-11-29 07:11:42,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 507 transitions. [2023-11-29 07:11:42,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:11:42,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 507 transitions. [2023-11-29 07:11:42,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.4) internal successors, (507), 5 states have internal predecessors, (507), 0 states have call successors, (0), 0 states 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 07:11:42,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 07:11:42,878 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 07:11:42,878 INFO L175 Difference]: Start difference. First operand has 199 places, 164 transitions, 1217 flow. Second operand 5 states and 507 transitions. [2023-11-29 07:11:42,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 342 transitions, 3680 flow [2023-11-29 07:11:43,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 342 transitions, 3663 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 07:11:43,921 INFO L231 Difference]: Finished difference. Result has 203 places, 164 transitions, 1246 flow [2023-11-29 07:11:43,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1246, PETRI_PLACES=203, PETRI_TRANSITIONS=164} [2023-11-29 07:11:43,922 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 80 predicate places. [2023-11-29 07:11:43,922 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 164 transitions, 1246 flow [2023-11-29 07:11:43,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 states 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 07:11:43,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:11:43,922 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:11:43,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-29 07:11:43,922 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-29 07:11:43,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:11:43,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1983521318, now seen corresponding path program 1 times [2023-11-29 07:11:43,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:11:43,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949759615] [2023-11-29 07:11:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:11:43,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:11:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:11:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 07:11:44,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:11:44,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949759615] [2023-11-29 07:11:44,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949759615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:11:44,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:11:44,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 07:11:44,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864687742] [2023-11-29 07:11:44,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:11:44,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:11:44,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:11:44,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:11:44,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:11:44,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 139 [2023-11-29 07:11:44,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 164 transitions, 1246 flow. Second operand has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 07:11:44,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:11:44,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 139 [2023-11-29 07:11:44,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand