./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX --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 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:53:08,647 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:53:08,733 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:53:08,738 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:53:08,738 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:53:08,760 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:53:08,760 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:53:08,761 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:53:08,761 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:53:08,762 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:53:08,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:53:08,763 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:53:08,763 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:53:08,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:53:08,764 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:53:08,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:53:08,765 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:53:08,765 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:53:08,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:53:08,766 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:53:08,766 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:53:08,767 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:53:08,768 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:53:08,768 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:53:08,768 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:53:08,769 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:53:08,769 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:53:08,769 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:53:08,770 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:53:08,770 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:53:08,771 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:53:08,771 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:53:08,787 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:53:08,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:53:08,787 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:53:08,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:53:08,788 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:53:08,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:53:08,788 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:53:08,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:53:08,789 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:53:08,791 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:53:08,791 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_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2024-11-08 16:53:09,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:53:09,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:53:09,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:53:09,140 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:53:09,141 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:53:09,142 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c Unable to find full path for "g++" [2024-11-08 16:53:11,153 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:53:11,429 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:53:11,429 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2024-11-08 16:53:11,441 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/data/64afe8aa5/e68e152aa7844034bcb8d6be8073a32c/FLAG82c0251dd [2024-11-08 16:53:11,465 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/data/64afe8aa5/e68e152aa7844034bcb8d6be8073a32c [2024-11-08 16:53:11,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:53:11,470 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:53:11,472 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:53:11,474 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:53:11,480 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:53:11,481 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:11,482 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4220e408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11, skipping insertion in model container [2024-11-08 16:53:11,482 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:11,519 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:53:11,827 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 16:53:11,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:53:11,851 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:53:11,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:53:11,916 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:53:11,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11 WrapperNode [2024-11-08 16:53:11,917 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:53:11,918 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:53:11,919 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:53:11,919 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:53:11,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:11,937 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:11,966 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 91 [2024-11-08 16:53:11,968 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:53:11,969 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:53:11,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:53:11,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:53:11,982 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:11,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:11,985 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:12,020 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-08 16:53:12,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:12,020 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:12,027 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:12,031 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:12,032 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:12,034 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:12,037 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:53:12,038 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:53:12,038 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:53:12,038 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:53:12,039 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (1/1) ... [2024-11-08 16:53:12,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:53:12,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:12,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:53:12,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:53:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:53:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 16:53:12,122 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 16:53:12,123 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 16:53:12,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 16:53:12,123 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 16:53:12,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 16:53:12,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 16:53:12,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 16:53:12,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:53:12,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 16:53:12,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 16:53:12,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:53:12,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:53:12,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:53:12,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 16:53:12,130 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 16:53:12,242 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:53:12,244 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:53:12,637 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 16:53:12,637 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:53:12,976 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:53:12,976 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 16:53:12,977 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:53:12 BoogieIcfgContainer [2024-11-08 16:53:12,977 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:53:12,979 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:53:12,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:53:12,984 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:53:12,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:53:11" (1/3) ... [2024-11-08 16:53:12,987 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be5daac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:53:12, skipping insertion in model container [2024-11-08 16:53:12,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:53:11" (2/3) ... [2024-11-08 16:53:12,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be5daac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:53:12, skipping insertion in model container [2024-11-08 16:53:12,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:53:12" (3/3) ... [2024-11-08 16:53:12,992 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2024-11-08 16:53:13,010 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:53:13,011 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-08 16:53:13,011 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 16:53:13,115 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 16:53:13,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 71 transitions, 163 flow [2024-11-08 16:53:13,220 INFO L124 PetriNetUnfolderBase]: 11/68 cut-off events. [2024-11-08 16:53:13,220 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 16:53:13,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 68 events. 11/68 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 182 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2024-11-08 16:53:13,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 71 transitions, 163 flow [2024-11-08 16:53:13,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 67 transitions, 152 flow [2024-11-08 16:53:13,251 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:53:13,258 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@59482802, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:53:13,258 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-08 16:53:13,266 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:53:13,266 INFO L124 PetriNetUnfolderBase]: 2/8 cut-off events. [2024-11-08 16:53:13,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:53:13,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:13,267 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:53:13,268 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:13,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash 14121544, now seen corresponding path program 1 times [2024-11-08 16:53:13,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:13,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708978355] [2024-11-08 16:53:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:13,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:13,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:13,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708978355] [2024-11-08 16:53:13,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708978355] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:53:13,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:53:13,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 16:53:13,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019206605] [2024-11-08 16:53:13,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:53:13,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:53:13,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:13,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:53:13,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:53:13,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 71 [2024-11-08 16:53:13,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:13,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:13,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 71 [2024-11-08 16:53:13,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:14,236 INFO L124 PetriNetUnfolderBase]: 910/1507 cut-off events. [2024-11-08 16:53:14,236 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-08 16:53:14,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2797 conditions, 1507 events. 910/1507 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8044 event pairs, 533 based on Foata normal form. 1/1217 useless extension candidates. Maximal degree in co-relation 2548. Up to 1190 conditions per place. [2024-11-08 16:53:14,266 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 27 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-11-08 16:53:14,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 204 flow [2024-11-08 16:53:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:53:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:53:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-11-08 16:53:14,282 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6948356807511737 [2024-11-08 16:53:14,284 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 152 flow. Second operand 3 states and 148 transitions. [2024-11-08 16:53:14,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 204 flow [2024-11-08 16:53:14,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 192 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 16:53:14,304 INFO L231 Difference]: Finished difference. Result has 59 places, 64 transitions, 138 flow [2024-11-08 16:53:14,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=59, PETRI_TRANSITIONS=64} [2024-11-08 16:53:14,314 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2024-11-08 16:53:14,314 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 64 transitions, 138 flow [2024-11-08 16:53:14,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:14,315 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:14,315 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:53:14,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:53:14,317 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:14,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:14,318 INFO L85 PathProgramCache]: Analyzing trace with hash 14121545, now seen corresponding path program 1 times [2024-11-08 16:53:14,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:14,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461393635] [2024-11-08 16:53:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:14,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:14,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:14,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461393635] [2024-11-08 16:53:14,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461393635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:53:14,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:53:14,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:53:14,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439765254] [2024-11-08 16:53:14,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:53:14,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:53:14,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:14,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:53:14,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:53:14,805 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 71 [2024-11-08 16:53:14,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 64 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:14,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:14,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 71 [2024-11-08 16:53:14,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:15,134 INFO L124 PetriNetUnfolderBase]: 909/1505 cut-off events. [2024-11-08 16:53:15,134 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-08 16:53:15,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2735 conditions, 1505 events. 909/1505 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8037 event pairs, 533 based on Foata normal form. 0/1214 useless extension candidates. Maximal degree in co-relation 2718. Up to 1190 conditions per place. [2024-11-08 16:53:15,149 INFO L140 encePairwiseOnDemand]: 65/71 looper letters, 27 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-11-08 16:53:15,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 196 flow [2024-11-08 16:53:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:53:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:53:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-11-08 16:53:15,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6232394366197183 [2024-11-08 16:53:15,152 INFO L175 Difference]: Start difference. First operand has 59 places, 64 transitions, 138 flow. Second operand 4 states and 177 transitions. [2024-11-08 16:53:15,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 196 flow [2024-11-08 16:53:15,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:53:15,156 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 138 flow [2024-11-08 16:53:15,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2024-11-08 16:53:15,157 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2024-11-08 16:53:15,157 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 138 flow [2024-11-08 16:53:15,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:15,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:15,157 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:15,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 16:53:15,158 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:15,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:15,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1585774305, now seen corresponding path program 1 times [2024-11-08 16:53:15,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:15,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784881768] [2024-11-08 16:53:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:15,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:15,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:15,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784881768] [2024-11-08 16:53:15,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784881768] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:53:15,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:53:15,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:53:15,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893980586] [2024-11-08 16:53:15,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:53:15,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:53:15,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:53:15,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:53:15,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 71 [2024-11-08 16:53:15,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:15,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:15,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 71 [2024-11-08 16:53:15,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:15,700 INFO L124 PetriNetUnfolderBase]: 1505/2226 cut-off events. [2024-11-08 16:53:15,700 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-08 16:53:15,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4282 conditions, 2226 events. 1505/2226 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10758 event pairs, 974 based on Foata normal form. 0/2008 useless extension candidates. Maximal degree in co-relation 4265. Up to 2003 conditions per place. [2024-11-08 16:53:15,718 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 30 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-11-08 16:53:15,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 56 transitions, 190 flow [2024-11-08 16:53:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:53:15,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:53:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-08 16:53:15,720 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5563380281690141 [2024-11-08 16:53:15,720 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 138 flow. Second operand 4 states and 158 transitions. [2024-11-08 16:53:15,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 56 transitions, 190 flow [2024-11-08 16:53:15,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:53:15,722 INFO L231 Difference]: Finished difference. Result has 53 places, 56 transitions, 122 flow [2024-11-08 16:53:15,722 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=53, PETRI_TRANSITIONS=56} [2024-11-08 16:53:15,723 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -13 predicate places. [2024-11-08 16:53:15,723 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 56 transitions, 122 flow [2024-11-08 16:53:15,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:15,724 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:15,724 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:15,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 16:53:15,724 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:15,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:15,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1585774306, now seen corresponding path program 1 times [2024-11-08 16:53:15,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:15,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654899282] [2024-11-08 16:53:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:15,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:15,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:15,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654899282] [2024-11-08 16:53:15,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654899282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:53:15,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:53:15,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:53:15,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587605166] [2024-11-08 16:53:15,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:53:15,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:53:15,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:15,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:53:15,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:53:15,837 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 71 [2024-11-08 16:53:15,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 56 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:15,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:15,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 71 [2024-11-08 16:53:15,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:16,116 INFO L124 PetriNetUnfolderBase]: 909/1447 cut-off events. [2024-11-08 16:53:16,117 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-08 16:53:16,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2681 conditions, 1447 events. 909/1447 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7265 event pairs, 533 based on Foata normal form. 1/1218 useless extension candidates. Maximal degree in co-relation 2656. Up to 1195 conditions per place. [2024-11-08 16:53:16,132 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 32 selfloop transitions, 2 changer transitions 1/60 dead transitions. [2024-11-08 16:53:16,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 200 flow [2024-11-08 16:53:16,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:53:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:53:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 184 transitions. [2024-11-08 16:53:16,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.647887323943662 [2024-11-08 16:53:16,135 INFO L175 Difference]: Start difference. First operand has 53 places, 56 transitions, 122 flow. Second operand 4 states and 184 transitions. [2024-11-08 16:53:16,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 200 flow [2024-11-08 16:53:16,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:53:16,141 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 133 flow [2024-11-08 16:53:16,141 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2024-11-08 16:53:16,142 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2024-11-08 16:53:16,142 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 133 flow [2024-11-08 16:53:16,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:16,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:16,144 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:16,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 16:53:16,144 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:16,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash 978815073, now seen corresponding path program 1 times [2024-11-08 16:53:16,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:16,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21916787] [2024-11-08 16:53:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:16,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:16,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21916787] [2024-11-08 16:53:16,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21916787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:16,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239050665] [2024-11-08 16:53:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:16,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:16,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:16,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:16,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:53:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:16,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 16:53:16,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:16,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:16,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239050665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:16,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:16,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-08 16:53:16,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782034947] [2024-11-08 16:53:16,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:16,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 16:53:16,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:16,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 16:53:16,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:53:16,724 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2024-11-08 16:53:16,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 133 flow. Second operand has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:16,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:16,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2024-11-08 16:53:16,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:17,315 INFO L124 PetriNetUnfolderBase]: 1893/3018 cut-off events. [2024-11-08 16:53:17,316 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-08 16:53:17,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5638 conditions, 3018 events. 1893/3018 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 16905 event pairs, 831 based on Foata normal form. 0/2638 useless extension candidates. Maximal degree in co-relation 5622. Up to 1416 conditions per place. [2024-11-08 16:53:17,337 INFO L140 encePairwiseOnDemand]: 61/71 looper letters, 83 selfloop transitions, 12 changer transitions 0/117 dead transitions. [2024-11-08 16:53:17,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 117 transitions, 460 flow [2024-11-08 16:53:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:53:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 16:53:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 402 transitions. [2024-11-08 16:53:17,340 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6291079812206573 [2024-11-08 16:53:17,340 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 133 flow. Second operand 9 states and 402 transitions. [2024-11-08 16:53:17,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 117 transitions, 460 flow [2024-11-08 16:53:17,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 117 transitions, 454 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-08 16:53:17,347 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 201 flow [2024-11-08 16:53:17,348 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=201, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-11-08 16:53:17,348 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2024-11-08 16:53:17,348 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 201 flow [2024-11-08 16:53:17,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:17,349 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:17,351 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:17,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:17,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:17,556 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:17,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:17,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1027615800, now seen corresponding path program 1 times [2024-11-08 16:53:17,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:17,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407199173] [2024-11-08 16:53:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:17,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:17,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:17,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407199173] [2024-11-08 16:53:17,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407199173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:17,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422481953] [2024-11-08 16:53:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:17,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:17,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:17,726 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:17,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:53:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:17,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:53:17,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:17,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:18,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422481953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:18,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:18,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 16:53:18,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459043892] [2024-11-08 16:53:18,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:18,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:53:18,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:18,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:53:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:53:18,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2024-11-08 16:53:18,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 201 flow. Second operand has 14 states, 14 states have (on average 36.142857142857146) internal successors, (506), 14 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:18,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:18,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2024-11-08 16:53:18,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:18,850 INFO L124 PetriNetUnfolderBase]: 1599/2560 cut-off events. [2024-11-08 16:53:18,850 INFO L125 PetriNetUnfolderBase]: For 605/605 co-relation queries the response was YES. [2024-11-08 16:53:18,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5157 conditions, 2560 events. 1599/2560 cut-off events. For 605/605 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14059 event pairs, 747 based on Foata normal form. 0/2179 useless extension candidates. Maximal degree in co-relation 3879. Up to 1404 conditions per place. [2024-11-08 16:53:18,870 INFO L140 encePairwiseOnDemand]: 61/71 looper letters, 75 selfloop transitions, 12 changer transitions 0/110 dead transitions. [2024-11-08 16:53:18,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 110 transitions, 492 flow [2024-11-08 16:53:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:53:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 16:53:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 394 transitions. [2024-11-08 16:53:18,872 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6165884194053208 [2024-11-08 16:53:18,872 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 201 flow. Second operand 9 states and 394 transitions. [2024-11-08 16:53:18,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 110 transitions, 492 flow [2024-11-08 16:53:18,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 484 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-08 16:53:18,876 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 241 flow [2024-11-08 16:53:18,877 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=241, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2024-11-08 16:53:18,877 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2024-11-08 16:53:18,878 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 241 flow [2024-11-08 16:53:18,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 36.142857142857146) internal successors, (506), 14 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:18,878 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:18,879 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:18,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 16:53:19,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 16:53:19,083 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:19,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:19,084 INFO L85 PathProgramCache]: Analyzing trace with hash 868620930, now seen corresponding path program 2 times [2024-11-08 16:53:19,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:19,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60496556] [2024-11-08 16:53:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:19,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:53:19,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60496556] [2024-11-08 16:53:19,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60496556] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049670710] [2024-11-08 16:53:19,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:53:19,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:19,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:19,344 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:19,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:53:19,422 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 16:53:19,423 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:53:19,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 16:53:19,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:19,492 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 8 treesize of output 1 [2024-11-08 16:53:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 16:53:19,832 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:53:19,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049670710] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:53:19,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:53:19,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-08 16:53:19,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069628523] [2024-11-08 16:53:19,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:53:19,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:53:19,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:53:19,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-08 16:53:20,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 71 [2024-11-08 16:53:20,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 37.5) internal successors, (225), 6 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:20,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:20,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 71 [2024-11-08 16:53:20,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:20,538 INFO L124 PetriNetUnfolderBase]: 1414/2422 cut-off events. [2024-11-08 16:53:20,539 INFO L125 PetriNetUnfolderBase]: For 788/788 co-relation queries the response was YES. [2024-11-08 16:53:20,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5473 conditions, 2422 events. 1414/2422 cut-off events. For 788/788 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14232 event pairs, 300 based on Foata normal form. 0/2234 useless extension candidates. Maximal degree in co-relation 4250. Up to 755 conditions per place. [2024-11-08 16:53:20,556 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 61 selfloop transitions, 10 changer transitions 0/98 dead transitions. [2024-11-08 16:53:20,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 98 transitions, 470 flow [2024-11-08 16:53:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:53:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:53:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 280 transitions. [2024-11-08 16:53:20,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6572769953051644 [2024-11-08 16:53:20,558 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 241 flow. Second operand 6 states and 280 transitions. [2024-11-08 16:53:20,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 98 transitions, 470 flow [2024-11-08 16:53:20,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 98 transitions, 461 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 16:53:20,567 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 253 flow [2024-11-08 16:53:20,567 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=253, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2024-11-08 16:53:20,568 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2024-11-08 16:53:20,568 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 253 flow [2024-11-08 16:53:20,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.5) internal successors, (225), 6 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:20,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:20,569 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:20,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:53:20,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:20,774 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:20,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:20,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1291963518, now seen corresponding path program 1 times [2024-11-08 16:53:20,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:20,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231647444] [2024-11-08 16:53:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:20,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:20,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:20,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231647444] [2024-11-08 16:53:20,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231647444] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:20,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793433806] [2024-11-08 16:53:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:20,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:20,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:20,926 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:20,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:53:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:21,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:53:21,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:21,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:21,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793433806] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:21,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:21,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-08 16:53:21,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039056496] [2024-11-08 16:53:21,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:21,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 16:53:21,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 16:53:21,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-08 16:53:21,364 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2024-11-08 16:53:21,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 253 flow. Second operand has 13 states, 13 states have (on average 36.46153846153846) internal successors, (474), 13 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:21,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:21,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2024-11-08 16:53:21,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:21,937 INFO L124 PetriNetUnfolderBase]: 1414/2271 cut-off events. [2024-11-08 16:53:21,938 INFO L125 PetriNetUnfolderBase]: For 2024/2416 co-relation queries the response was YES. [2024-11-08 16:53:21,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5378 conditions, 2271 events. 1414/2271 cut-off events. For 2024/2416 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12059 event pairs, 678 based on Foata normal form. 2/1991 useless extension candidates. Maximal degree in co-relation 4411. Up to 1358 conditions per place. [2024-11-08 16:53:21,963 INFO L140 encePairwiseOnDemand]: 61/71 looper letters, 69 selfloop transitions, 12 changer transitions 0/103 dead transitions. [2024-11-08 16:53:21,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 103 transitions, 542 flow [2024-11-08 16:53:21,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:53:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 16:53:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 386 transitions. [2024-11-08 16:53:21,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6040688575899843 [2024-11-08 16:53:21,966 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 253 flow. Second operand 9 states and 386 transitions. [2024-11-08 16:53:21,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 103 transitions, 542 flow [2024-11-08 16:53:21,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 103 transitions, 526 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:53:21,973 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 290 flow [2024-11-08 16:53:21,975 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=290, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2024-11-08 16:53:21,976 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2024-11-08 16:53:21,978 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 290 flow [2024-11-08 16:53:21,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 36.46153846153846) internal successors, (474), 13 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:21,979 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:21,979 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:22,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:22,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:22,180 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:22,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1789740519, now seen corresponding path program 2 times [2024-11-08 16:53:22,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:22,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318976125] [2024-11-08 16:53:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:22,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:22,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:22,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318976125] [2024-11-08 16:53:22,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318976125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:22,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119501959] [2024-11-08 16:53:22,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:53:22,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:22,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:22,461 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:22,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:53:22,542 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 16:53:22,543 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:53:22,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 16:53:22,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:22,565 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 10 treesize of output 9 [2024-11-08 16:53:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 16:53:23,283 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:53:23,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119501959] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:53:23,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:53:23,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-08 16:53:23,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872443635] [2024-11-08 16:53:23,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:53:23,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:53:23,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:23,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:53:23,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-08 16:53:23,780 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 71 [2024-11-08 16:53:23,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 38.833333333333336) internal successors, (233), 6 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:23,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:23,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 71 [2024-11-08 16:53:23,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:24,587 INFO L124 PetriNetUnfolderBase]: 2348/3819 cut-off events. [2024-11-08 16:53:24,587 INFO L125 PetriNetUnfolderBase]: For 2922/3587 co-relation queries the response was YES. [2024-11-08 16:53:24,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9164 conditions, 3819 events. 2348/3819 cut-off events. For 2922/3587 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22094 event pairs, 789 based on Foata normal form. 70/3636 useless extension candidates. Maximal degree in co-relation 8259. Up to 2173 conditions per place. [2024-11-08 16:53:24,617 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 72 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2024-11-08 16:53:24,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 109 transitions, 600 flow [2024-11-08 16:53:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:53:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:53:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 290 transitions. [2024-11-08 16:53:24,619 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6807511737089202 [2024-11-08 16:53:24,619 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 290 flow. Second operand 6 states and 290 transitions. [2024-11-08 16:53:24,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 109 transitions, 600 flow [2024-11-08 16:53:24,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 109 transitions, 591 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 16:53:24,636 INFO L231 Difference]: Finished difference. Result has 86 places, 73 transitions, 335 flow [2024-11-08 16:53:24,636 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=335, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2024-11-08 16:53:24,637 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 20 predicate places. [2024-11-08 16:53:24,637 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 335 flow [2024-11-08 16:53:24,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.833333333333336) internal successors, (233), 6 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:24,638 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:24,638 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:24,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:24,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:24,840 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:24,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:24,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1352977699, now seen corresponding path program 2 times [2024-11-08 16:53:24,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:24,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466501114] [2024-11-08 16:53:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:24,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:53:25,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:25,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466501114] [2024-11-08 16:53:25,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466501114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:25,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299870500] [2024-11-08 16:53:25,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:53:25,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:25,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:25,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:25,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:53:25,180 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 16:53:25,180 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:53:25,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 16:53:25,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:25,199 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 8 treesize of output 1 [2024-11-08 16:53:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 16:53:25,524 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:53:25,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299870500] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:53:25,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:53:25,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2024-11-08 16:53:25,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969548680] [2024-11-08 16:53:25,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:53:25,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:53:25,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:25,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:53:25,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:53:25,812 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2024-11-08 16:53:25,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 73 transitions, 335 flow. Second operand has 6 states, 6 states have (on average 36.166666666666664) internal successors, (217), 6 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:25,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:25,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2024-11-08 16:53:25,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:26,575 INFO L124 PetriNetUnfolderBase]: 2845/4181 cut-off events. [2024-11-08 16:53:26,575 INFO L125 PetriNetUnfolderBase]: For 5676/7074 co-relation queries the response was YES. [2024-11-08 16:53:26,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11832 conditions, 4181 events. 2845/4181 cut-off events. For 5676/7074 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21731 event pairs, 451 based on Foata normal form. 16/4023 useless extension candidates. Maximal degree in co-relation 10674. Up to 1617 conditions per place. [2024-11-08 16:53:26,609 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 76 selfloop transitions, 10 changer transitions 0/110 dead transitions. [2024-11-08 16:53:26,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 110 transitions, 692 flow [2024-11-08 16:53:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:53:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:53:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 266 transitions. [2024-11-08 16:53:26,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6244131455399061 [2024-11-08 16:53:26,612 INFO L175 Difference]: Start difference. First operand has 86 places, 73 transitions, 335 flow. Second operand 6 states and 266 transitions. [2024-11-08 16:53:26,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 110 transitions, 692 flow [2024-11-08 16:53:26,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 110 transitions, 686 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 16:53:26,627 INFO L231 Difference]: Finished difference. Result has 87 places, 72 transitions, 350 flow [2024-11-08 16:53:26,628 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=350, PETRI_PLACES=87, PETRI_TRANSITIONS=72} [2024-11-08 16:53:26,629 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 21 predicate places. [2024-11-08 16:53:26,629 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 72 transitions, 350 flow [2024-11-08 16:53:26,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.166666666666664) internal successors, (217), 6 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:26,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:26,630 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:26,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:26,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 16:53:26,831 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:26,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:26,832 INFO L85 PathProgramCache]: Analyzing trace with hash -580193856, now seen corresponding path program 1 times [2024-11-08 16:53:26,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:26,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731079787] [2024-11-08 16:53:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:26,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:27,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:27,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731079787] [2024-11-08 16:53:27,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731079787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:27,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920221051] [2024-11-08 16:53:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:27,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:27,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:27,023 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:27,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 16:53:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:27,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 16:53:27,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:27,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:27,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920221051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:27,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:27,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-08 16:53:27,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038000215] [2024-11-08 16:53:27,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:27,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 16:53:27,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 16:53:27,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-11-08 16:53:27,717 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2024-11-08 16:53:27,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 72 transitions, 350 flow. Second operand has 19 states, 19 states have (on average 36.473684210526315) internal successors, (693), 19 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:27,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:27,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2024-11-08 16:53:27,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:29,159 INFO L124 PetriNetUnfolderBase]: 4594/6940 cut-off events. [2024-11-08 16:53:29,160 INFO L125 PetriNetUnfolderBase]: For 10067/12695 co-relation queries the response was YES. [2024-11-08 16:53:29,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20236 conditions, 6940 events. 4594/6940 cut-off events. For 10067/12695 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 39815 event pairs, 1246 based on Foata normal form. 127/6732 useless extension candidates. Maximal degree in co-relation 11965. Up to 2415 conditions per place. [2024-11-08 16:53:29,223 INFO L140 encePairwiseOnDemand]: 60/71 looper letters, 140 selfloop transitions, 25 changer transitions 0/185 dead transitions. [2024-11-08 16:53:29,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 185 transitions, 1175 flow [2024-11-08 16:53:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 16:53:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 16:53:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 576 transitions. [2024-11-08 16:53:29,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6240520043336945 [2024-11-08 16:53:29,228 INFO L175 Difference]: Start difference. First operand has 87 places, 72 transitions, 350 flow. Second operand 13 states and 576 transitions. [2024-11-08 16:53:29,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 185 transitions, 1175 flow [2024-11-08 16:53:29,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 185 transitions, 1143 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:53:29,258 INFO L231 Difference]: Finished difference. Result has 102 places, 84 transitions, 513 flow [2024-11-08 16:53:29,258 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=513, PETRI_PLACES=102, PETRI_TRANSITIONS=84} [2024-11-08 16:53:29,259 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 36 predicate places. [2024-11-08 16:53:29,259 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 84 transitions, 513 flow [2024-11-08 16:53:29,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 36.473684210526315) internal successors, (693), 19 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:29,260 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:29,260 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:29,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 16:53:29,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 16:53:29,461 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:29,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:29,462 INFO L85 PathProgramCache]: Analyzing trace with hash -4705089, now seen corresponding path program 2 times [2024-11-08 16:53:29,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:29,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459259996] [2024-11-08 16:53:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:29,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 16:53:29,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:29,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459259996] [2024-11-08 16:53:29,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459259996] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:53:29,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:53:29,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:53:29,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586699832] [2024-11-08 16:53:29,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:53:29,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:53:29,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:29,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:53:29,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:53:29,588 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 71 [2024-11-08 16:53:29,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 84 transitions, 513 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:29,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:29,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 71 [2024-11-08 16:53:29,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:30,513 INFO L124 PetriNetUnfolderBase]: 4025/6446 cut-off events. [2024-11-08 16:53:30,513 INFO L125 PetriNetUnfolderBase]: For 12413/15420 co-relation queries the response was YES. [2024-11-08 16:53:30,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19318 conditions, 6446 events. 4025/6446 cut-off events. For 12413/15420 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 39540 event pairs, 974 based on Foata normal form. 47/6246 useless extension candidates. Maximal degree in co-relation 14036. Up to 2215 conditions per place. [2024-11-08 16:53:30,575 INFO L140 encePairwiseOnDemand]: 65/71 looper letters, 97 selfloop transitions, 9 changer transitions 0/138 dead transitions. [2024-11-08 16:53:30,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 138 transitions, 919 flow [2024-11-08 16:53:30,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:53:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:53:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 272 transitions. [2024-11-08 16:53:30,577 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7661971830985915 [2024-11-08 16:53:30,577 INFO L175 Difference]: Start difference. First operand has 102 places, 84 transitions, 513 flow. Second operand 5 states and 272 transitions. [2024-11-08 16:53:30,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 138 transitions, 919 flow [2024-11-08 16:53:30,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 138 transitions, 889 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-08 16:53:30,622 INFO L231 Difference]: Finished difference. Result has 105 places, 87 transitions, 529 flow [2024-11-08 16:53:30,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=105, PETRI_TRANSITIONS=87} [2024-11-08 16:53:30,625 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 39 predicate places. [2024-11-08 16:53:30,625 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 87 transitions, 529 flow [2024-11-08 16:53:30,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:30,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:30,627 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:30,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 16:53:30,628 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:30,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash 12005178, now seen corresponding path program 1 times [2024-11-08 16:53:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:30,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029570868] [2024-11-08 16:53:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:30,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:30,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:30,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029570868] [2024-11-08 16:53:30,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029570868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:30,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486613531] [2024-11-08 16:53:30,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:30,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:30,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:30,985 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:30,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 16:53:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:31,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:53:31,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 16:53:31,256 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:53:31,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486613531] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:53:31,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:53:31,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 15 [2024-11-08 16:53:31,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043962698] [2024-11-08 16:53:31,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:53:31,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:53:31,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:31,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:53:31,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-08 16:53:31,403 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 71 [2024-11-08 16:53:31,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 87 transitions, 529 flow. Second operand has 7 states, 7 states have (on average 39.857142857142854) internal successors, (279), 7 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:31,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:31,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 71 [2024-11-08 16:53:31,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:32,712 INFO L124 PetriNetUnfolderBase]: 4871/7929 cut-off events. [2024-11-08 16:53:32,712 INFO L125 PetriNetUnfolderBase]: For 14511/17995 co-relation queries the response was YES. [2024-11-08 16:53:32,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24667 conditions, 7929 events. 4871/7929 cut-off events. For 14511/17995 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 50029 event pairs, 732 based on Foata normal form. 81/7921 useless extension candidates. Maximal degree in co-relation 16699. Up to 2244 conditions per place. [2024-11-08 16:53:32,820 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 106 selfloop transitions, 23 changer transitions 0/162 dead transitions. [2024-11-08 16:53:32,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 162 transitions, 1089 flow [2024-11-08 16:53:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:53:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 16:53:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 399 transitions. [2024-11-08 16:53:32,822 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7024647887323944 [2024-11-08 16:53:32,822 INFO L175 Difference]: Start difference. First operand has 105 places, 87 transitions, 529 flow. Second operand 8 states and 399 transitions. [2024-11-08 16:53:32,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 162 transitions, 1089 flow [2024-11-08 16:53:32,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 162 transitions, 1089 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 16:53:32,894 INFO L231 Difference]: Finished difference. Result has 113 places, 92 transitions, 613 flow [2024-11-08 16:53:32,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=613, PETRI_PLACES=113, PETRI_TRANSITIONS=92} [2024-11-08 16:53:32,896 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 47 predicate places. [2024-11-08 16:53:32,896 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 92 transitions, 613 flow [2024-11-08 16:53:32,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.857142857142854) internal successors, (279), 7 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:32,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:32,897 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:32,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:33,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 16:53:33,098 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:33,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:33,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1561427701, now seen corresponding path program 1 times [2024-11-08 16:53:33,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:33,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746452899] [2024-11-08 16:53:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:33,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:53:33,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:33,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746452899] [2024-11-08 16:53:33,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746452899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:53:33,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:53:33,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:53:33,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458797388] [2024-11-08 16:53:33,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:53:33,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:53:33,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:53:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:53:33,443 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 71 [2024-11-08 16:53:33,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 92 transitions, 613 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:33,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:33,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 71 [2024-11-08 16:53:33,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:34,721 INFO L124 PetriNetUnfolderBase]: 5890/10176 cut-off events. [2024-11-08 16:53:34,721 INFO L125 PetriNetUnfolderBase]: For 28516/32968 co-relation queries the response was YES. [2024-11-08 16:53:34,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33197 conditions, 10176 events. 5890/10176 cut-off events. For 28516/32968 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 73205 event pairs, 1235 based on Foata normal form. 53/9882 useless extension candidates. Maximal degree in co-relation 22889. Up to 5270 conditions per place. [2024-11-08 16:53:34,806 INFO L140 encePairwiseOnDemand]: 66/71 looper letters, 73 selfloop transitions, 6 changer transitions 12/122 dead transitions. [2024-11-08 16:53:34,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 122 transitions, 972 flow [2024-11-08 16:53:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:53:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:53:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-11-08 16:53:34,808 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.812206572769953 [2024-11-08 16:53:34,808 INFO L175 Difference]: Start difference. First operand has 113 places, 92 transitions, 613 flow. Second operand 3 states and 173 transitions. [2024-11-08 16:53:34,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 122 transitions, 972 flow [2024-11-08 16:53:34,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 122 transitions, 943 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-08 16:53:34,917 INFO L231 Difference]: Finished difference. Result has 113 places, 85 transitions, 564 flow [2024-11-08 16:53:34,918 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=564, PETRI_PLACES=113, PETRI_TRANSITIONS=85} [2024-11-08 16:53:34,918 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 47 predicate places. [2024-11-08 16:53:34,918 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 85 transitions, 564 flow [2024-11-08 16:53:34,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:34,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:34,919 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:34,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-08 16:53:34,919 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:34,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:34,920 INFO L85 PathProgramCache]: Analyzing trace with hash 372160948, now seen corresponding path program 1 times [2024-11-08 16:53:34,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:34,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326991220] [2024-11-08 16:53:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:34,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 16:53:35,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:35,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326991220] [2024-11-08 16:53:35,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326991220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:35,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006710197] [2024-11-08 16:53:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:35,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:35,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:35,365 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:35,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 16:53:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:35,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 16:53:35,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:35,484 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 8 treesize of output 1 [2024-11-08 16:53:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:35,716 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:36,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006710197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:36,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:36,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2024-11-08 16:53:36,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241664347] [2024-11-08 16:53:36,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:36,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 16:53:36,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:36,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 16:53:36,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-11-08 16:53:38,021 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 71 [2024-11-08 16:53:38,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 85 transitions, 564 flow. Second operand has 24 states, 24 states have (on average 32.625) internal successors, (783), 24 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:38,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:38,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 71 [2024-11-08 16:53:38,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:42,217 INFO L124 PetriNetUnfolderBase]: 17153/23825 cut-off events. [2024-11-08 16:53:42,218 INFO L125 PetriNetUnfolderBase]: For 53165/63477 co-relation queries the response was YES. [2024-11-08 16:53:42,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80282 conditions, 23825 events. 17153/23825 cut-off events. For 53165/63477 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 138839 event pairs, 3487 based on Foata normal form. 414/23770 useless extension candidates. Maximal degree in co-relation 54703. Up to 4939 conditions per place. [2024-11-08 16:53:42,388 INFO L140 encePairwiseOnDemand]: 61/71 looper letters, 218 selfloop transitions, 28 changer transitions 0/263 dead transitions. [2024-11-08 16:53:42,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 263 transitions, 1790 flow [2024-11-08 16:53:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 16:53:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 16:53:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 659 transitions. [2024-11-08 16:53:42,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6187793427230047 [2024-11-08 16:53:42,391 INFO L175 Difference]: Start difference. First operand has 113 places, 85 transitions, 564 flow. Second operand 15 states and 659 transitions. [2024-11-08 16:53:42,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 263 transitions, 1790 flow [2024-11-08 16:53:42,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 263 transitions, 1633 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-11-08 16:53:42,775 INFO L231 Difference]: Finished difference. Result has 111 places, 93 transitions, 650 flow [2024-11-08 16:53:42,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=650, PETRI_PLACES=111, PETRI_TRANSITIONS=93} [2024-11-08 16:53:42,776 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 45 predicate places. [2024-11-08 16:53:42,777 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 93 transitions, 650 flow [2024-11-08 16:53:42,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 32.625) internal successors, (783), 24 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:42,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:42,778 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:42,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 16:53:42,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 16:53:42,982 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:42,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:42,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1767763553, now seen corresponding path program 1 times [2024-11-08 16:53:42,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:42,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976298742] [2024-11-08 16:53:42,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:42,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:43,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:43,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976298742] [2024-11-08 16:53:43,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976298742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:43,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603132717] [2024-11-08 16:53:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:43,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:43,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:43,172 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:43,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 16:53:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:43,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 16:53:43,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:43,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:43,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603132717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:43,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:43,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-11-08 16:53:43,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140402539] [2024-11-08 16:53:43,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:43,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 16:53:43,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:43,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 16:53:43,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2024-11-08 16:53:44,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2024-11-08 16:53:44,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 93 transitions, 650 flow. Second operand has 24 states, 24 states have (on average 36.708333333333336) internal successors, (881), 24 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:44,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:44,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2024-11-08 16:53:44,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:47,331 INFO L124 PetriNetUnfolderBase]: 16515/23661 cut-off events. [2024-11-08 16:53:47,331 INFO L125 PetriNetUnfolderBase]: For 47882/52993 co-relation queries the response was YES. [2024-11-08 16:53:47,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81288 conditions, 23661 events. 16515/23661 cut-off events. For 47882/52993 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 149533 event pairs, 4120 based on Foata normal form. 263/23442 useless extension candidates. Maximal degree in co-relation 52136. Up to 7074 conditions per place. [2024-11-08 16:53:47,468 INFO L140 encePairwiseOnDemand]: 60/71 looper letters, 186 selfloop transitions, 43 changer transitions 0/249 dead transitions. [2024-11-08 16:53:47,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 249 transitions, 1800 flow [2024-11-08 16:53:47,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 16:53:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-08 16:53:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 716 transitions. [2024-11-08 16:53:47,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6302816901408451 [2024-11-08 16:53:47,471 INFO L175 Difference]: Start difference. First operand has 111 places, 93 transitions, 650 flow. Second operand 16 states and 716 transitions. [2024-11-08 16:53:47,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 249 transitions, 1800 flow [2024-11-08 16:53:47,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 249 transitions, 1740 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-11-08 16:53:47,830 INFO L231 Difference]: Finished difference. Result has 125 places, 112 transitions, 944 flow [2024-11-08 16:53:47,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=944, PETRI_PLACES=125, PETRI_TRANSITIONS=112} [2024-11-08 16:53:47,831 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 59 predicate places. [2024-11-08 16:53:47,831 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 112 transitions, 944 flow [2024-11-08 16:53:47,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 36.708333333333336) internal successors, (881), 24 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:47,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:47,832 INFO L204 CegarLoopForPetriNet]: trace histogram [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] [2024-11-08 16:53:47,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:48,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 16:53:48,032 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:48,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:48,033 INFO L85 PathProgramCache]: Analyzing trace with hash -464950821, now seen corresponding path program 1 times [2024-11-08 16:53:48,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:48,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406717174] [2024-11-08 16:53:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:48,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:53:48,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:48,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406717174] [2024-11-08 16:53:48,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406717174] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:48,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022394242] [2024-11-08 16:53:48,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:48,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:48,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:48,188 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:48,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 16:53:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:48,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 16:53:48,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:53:48,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:53:48,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022394242] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:48,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:53:48,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2024-11-08 16:53:48,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587158114] [2024-11-08 16:53:48,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:53:48,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 16:53:48,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:48,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 16:53:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-11-08 16:53:48,641 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 71 [2024-11-08 16:53:48,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 112 transitions, 944 flow. Second operand has 8 states, 8 states have (on average 34.625) internal successors, (277), 8 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:48,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:48,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 71 [2024-11-08 16:53:48,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:53:53,129 INFO L124 PetriNetUnfolderBase]: 19365/29331 cut-off events. [2024-11-08 16:53:53,129 INFO L125 PetriNetUnfolderBase]: For 79726/84372 co-relation queries the response was YES. [2024-11-08 16:53:53,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100611 conditions, 29331 events. 19365/29331 cut-off events. For 79726/84372 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 209118 event pairs, 3714 based on Foata normal form. 1070/29565 useless extension candidates. Maximal degree in co-relation 83548. Up to 8092 conditions per place. [2024-11-08 16:53:53,316 INFO L140 encePairwiseOnDemand]: 58/71 looper letters, 191 selfloop transitions, 59 changer transitions 0/267 dead transitions. [2024-11-08 16:53:53,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 267 transitions, 2441 flow [2024-11-08 16:53:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:53:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 16:53:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 523 transitions. [2024-11-08 16:53:53,318 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.613849765258216 [2024-11-08 16:53:53,318 INFO L175 Difference]: Start difference. First operand has 125 places, 112 transitions, 944 flow. Second operand 12 states and 523 transitions. [2024-11-08 16:53:53,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 267 transitions, 2441 flow [2024-11-08 16:53:53,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 267 transitions, 2324 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-08 16:53:53,783 INFO L231 Difference]: Finished difference. Result has 136 places, 147 transitions, 1454 flow [2024-11-08 16:53:53,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1454, PETRI_PLACES=136, PETRI_TRANSITIONS=147} [2024-11-08 16:53:53,784 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 70 predicate places. [2024-11-08 16:53:53,784 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 147 transitions, 1454 flow [2024-11-08 16:53:53,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.625) internal successors, (277), 8 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:53,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:53:53,785 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:53,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 16:53:53,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 16:53:53,985 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:53:53,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:53,986 INFO L85 PathProgramCache]: Analyzing trace with hash -771581374, now seen corresponding path program 2 times [2024-11-08 16:53:53,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:53,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787108180] [2024-11-08 16:53:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:53,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 16:53:54,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:54,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787108180] [2024-11-08 16:53:54,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787108180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:54,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575307276] [2024-11-08 16:53:54,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:53:54,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:54,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:54,461 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:54,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 16:53:54,561 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:53:54,561 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:53:54,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 16:53:54,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:54,584 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 8 treesize of output 1 [2024-11-08 16:53:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 16:53:55,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 16:53:55,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575307276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:55,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:55,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-08 16:53:55,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195394406] [2024-11-08 16:53:55,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:55,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 16:53:55,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:55,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 16:53:55,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-11-08 16:53:57,050 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 71 [2024-11-08 16:53:57,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 147 transitions, 1454 flow. Second operand has 22 states, 22 states have (on average 32.77272727272727) internal successors, (721), 22 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:57,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:53:57,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 71 [2024-11-08 16:53:57,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:54:03,217 INFO L124 PetriNetUnfolderBase]: 26435/37352 cut-off events. [2024-11-08 16:54:03,217 INFO L125 PetriNetUnfolderBase]: For 123306/129020 co-relation queries the response was YES. [2024-11-08 16:54:03,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140683 conditions, 37352 events. 26435/37352 cut-off events. For 123306/129020 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 237169 event pairs, 2817 based on Foata normal form. 96/36864 useless extension candidates. Maximal degree in co-relation 140627. Up to 14741 conditions per place. [2024-11-08 16:54:03,555 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 178 selfloop transitions, 58 changer transitions 0/259 dead transitions. [2024-11-08 16:54:03,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 259 transitions, 2368 flow [2024-11-08 16:54:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:54:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 16:54:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 454 transitions. [2024-11-08 16:54:03,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6394366197183099 [2024-11-08 16:54:03,558 INFO L175 Difference]: Start difference. First operand has 136 places, 147 transitions, 1454 flow. Second operand 10 states and 454 transitions. [2024-11-08 16:54:03,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 259 transitions, 2368 flow [2024-11-08 16:54:05,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 259 transitions, 2333 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-08 16:54:05,212 INFO L231 Difference]: Finished difference. Result has 140 places, 151 transitions, 1588 flow [2024-11-08 16:54:05,212 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1588, PETRI_PLACES=140, PETRI_TRANSITIONS=151} [2024-11-08 16:54:05,212 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 74 predicate places. [2024-11-08 16:54:05,213 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 151 transitions, 1588 flow [2024-11-08 16:54:05,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 32.77272727272727) internal successors, (721), 22 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:05,213 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:54:05,213 INFO L204 CegarLoopForPetriNet]: trace histogram [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] [2024-11-08 16:54:05,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 16:54:05,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 16:54:05,418 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:54:05,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:54:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1235645499, now seen corresponding path program 2 times [2024-11-08 16:54:05,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:54:05,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296309050] [2024-11-08 16:54:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:54:05,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:54:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:54:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:54:05,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:54:05,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296309050] [2024-11-08 16:54:05,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296309050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:54:05,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971049721] [2024-11-08 16:54:05,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:54:05,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:05,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:54:05,572 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:54:05,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 16:54:05,672 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:54:05,673 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:54:05,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 16:54:05,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:54:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:54:05,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:54:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:54:05,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971049721] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:54:05,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:54:05,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2024-11-08 16:54:05,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711820553] [2024-11-08 16:54:05,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:54:05,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 16:54:05,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:54:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 16:54:05,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-08 16:54:05,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 71 [2024-11-08 16:54:05,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 151 transitions, 1588 flow. Second operand has 8 states, 8 states have (on average 34.625) internal successors, (277), 8 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:05,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:54:05,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 71 [2024-11-08 16:54:05,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:54:10,992 INFO L124 PetriNetUnfolderBase]: 23382/34932 cut-off events. [2024-11-08 16:54:10,992 INFO L125 PetriNetUnfolderBase]: For 155729/161607 co-relation queries the response was YES. [2024-11-08 16:54:11,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129898 conditions, 34932 events. 23382/34932 cut-off events. For 155729/161607 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 247719 event pairs, 3650 based on Foata normal form. 1171/35457 useless extension candidates. Maximal degree in co-relation 129842. Up to 7658 conditions per place. [2024-11-08 16:54:11,271 INFO L140 encePairwiseOnDemand]: 59/71 looper letters, 191 selfloop transitions, 92 changer transitions 0/299 dead transitions. [2024-11-08 16:54:11,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 299 transitions, 3404 flow [2024-11-08 16:54:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:54:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 16:54:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 422 transitions. [2024-11-08 16:54:11,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5943661971830986 [2024-11-08 16:54:11,273 INFO L175 Difference]: Start difference. First operand has 140 places, 151 transitions, 1588 flow. Second operand 10 states and 422 transitions. [2024-11-08 16:54:11,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 299 transitions, 3404 flow [2024-11-08 16:54:12,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 299 transitions, 3088 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-11-08 16:54:12,202 INFO L231 Difference]: Finished difference. Result has 147 places, 188 transitions, 2176 flow [2024-11-08 16:54:12,202 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2176, PETRI_PLACES=147, PETRI_TRANSITIONS=188} [2024-11-08 16:54:12,203 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 81 predicate places. [2024-11-08 16:54:12,203 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 188 transitions, 2176 flow [2024-11-08 16:54:12,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.625) internal successors, (277), 8 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:12,203 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:54:12,203 INFO L204 CegarLoopForPetriNet]: trace histogram [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] [2024-11-08 16:54:12,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-08 16:54:12,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:12,404 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-08 16:54:12,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:54:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1742371649, now seen corresponding path program 3 times [2024-11-08 16:54:12,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:54:12,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068492542] [2024-11-08 16:54:12,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:54:12,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:54:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:54:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:54:12,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:54:12,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068492542] [2024-11-08 16:54:12,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068492542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:54:12,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368688588] [2024-11-08 16:54:12,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:54:12,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:12,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:54:12,549 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:54:12,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fa15ee-ee1f-4620-9d24-9ff754186614/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 16:54:12,647 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 16:54:12,647 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:54:12,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 16:54:12,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:54:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 16:54:12,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:54:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 16:54:12,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368688588] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:54:12,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:54:12,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-08 16:54:12,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652525317] [2024-11-08 16:54:12,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:54:12,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:54:12,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:54:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:54:12,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:54:13,240 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 71 [2024-11-08 16:54:13,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 188 transitions, 2176 flow. Second operand has 14 states, 14 states have (on average 32.07142857142857) internal successors, (449), 14 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:13,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:54:13,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 71 [2024-11-08 16:54:13,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand