./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1 --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 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 12:15:53,981 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 12:15:54,036 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 12:15:54,041 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 12:15:54,042 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 12:15:54,062 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 12:15:54,063 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 12:15:54,063 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 12:15:54,064 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 12:15:54,064 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 12:15:54,064 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 12:15:54,064 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 12:15:54,064 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 12:15:54,064 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 12:15:54,064 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 12:15:54,064 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 12:15:54,065 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 12:15:54,066 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 12:15:54,066 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:15:54,066 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:15:54,066 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:15:54,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:15:54,066 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 12:15:54,066 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:15:54,066 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:15:54,066 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:15:54,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:15:54,066 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 12:15:54,066 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 12:15:54,066 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 12:15:54,067 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 12:15:54,067 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 12:15:54,067 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 12:15:54,067 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 12:15:54,067 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 12:15:54,067 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1 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 -> 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 [2024-12-02 12:15:54,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 12:15:54,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 12:15:54,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 12:15:54,288 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 12:15:54,288 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 12:15:54,290 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2024-12-02 12:15:56,911 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/data/579abbdcf/504db60bf7f44afabdf1f85a681e78d9/FLAG0e66f2e67 [2024-12-02 12:15:57,113 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 12:15:57,114 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2024-12-02 12:15:57,120 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/data/579abbdcf/504db60bf7f44afabdf1f85a681e78d9/FLAG0e66f2e67 [2024-12-02 12:15:57,498 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/data/579abbdcf/504db60bf7f44afabdf1f85a681e78d9 [2024-12-02 12:15:57,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 12:15:57,501 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 12:15:57,502 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 12:15:57,502 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 12:15:57,505 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 12:15:57,505 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,506 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fadda1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57, skipping insertion in model container [2024-12-02 12:15:57,506 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,518 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 12:15:57,647 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 12:15:57,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:15:57,660 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 12:15:57,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:15:57,695 INFO L204 MainTranslator]: Completed translation [2024-12-02 12:15:57,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57 WrapperNode [2024-12-02 12:15:57,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 12:15:57,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 12:15:57,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 12:15:57,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 12:15:57,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,707 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,728 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 124 [2024-12-02 12:15:57,729 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 12:15:57,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 12:15:57,729 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 12:15:57,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 12:15:57,737 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,739 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,754 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2024-12-02 12:15:57,754 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,754 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,760 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,761 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,765 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,766 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,767 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,769 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 12:15:57,770 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 12:15:57,770 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 12:15:57,770 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 12:15:57,771 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (1/1) ... [2024-12-02 12:15:57,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:15:57,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:15:57,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 12:15:57,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 12:15:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 12:15:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 12:15:57,823 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 12:15:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 12:15:57,823 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 12:15:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 12:15:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 12:15:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 12:15:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 12:15:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 12:15:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 12:15:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 12:15:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 12:15:57,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 12:15:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 12:15:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 12:15:57,826 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 12:15:57,915 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 12:15:57,916 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 12:15:58,136 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 12:15:58,137 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 12:15:58,308 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 12:15:58,309 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-12-02 12:15:58,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:15:58 BoogieIcfgContainer [2024-12-02 12:15:58,309 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 12:15:58,311 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 12:15:58,312 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 12:15:58,316 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 12:15:58,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:15:57" (1/3) ... [2024-12-02 12:15:58,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247ed317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:15:58, skipping insertion in model container [2024-12-02 12:15:58,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:15:57" (2/3) ... [2024-12-02 12:15:58,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247ed317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:15:58, skipping insertion in model container [2024-12-02 12:15:58,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:15:58" (3/3) ... [2024-12-02 12:15:58,319 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2024-12-02 12:15:58,332 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 12:15:58,333 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-simple-queue.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2024-12-02 12:15:58,333 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 12:15:58,387 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-12-02 12:15:58,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 88 flow [2024-12-02 12:15:58,449 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-12-02 12:15:58,451 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 12:15:58,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 5/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 53 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-12-02 12:15:58,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 37 transitions, 88 flow [2024-12-02 12:15:58,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 34 transitions, 80 flow [2024-12-02 12:15:58,465 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 12:15:58,477 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;@7315cd29, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 12:15:58,477 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-12-02 12:15:58,481 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 12:15:58,481 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 12:15:58,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 12:15:58,481 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:15:58,482 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 12:15:58,482 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:15:58,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:15:58,488 INFO L85 PathProgramCache]: Analyzing trace with hash 404354, now seen corresponding path program 1 times [2024-12-02 12:15:58,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:15:58,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941584980] [2024-12-02 12:15:58,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:15:58,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:15:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:15:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:15:58,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:15:58,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941584980] [2024-12-02 12:15:58,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941584980] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:15:58,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:15:58,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 12:15:58,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546121719] [2024-12-02 12:15:58,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:15:58,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:15:58,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:15:58,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:15:58,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:15:58,742 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-12-02 12:15:58,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:15:58,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:15:58,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-12-02 12:15:58,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:15:58,891 INFO L124 PetriNetUnfolderBase]: 212/371 cut-off events. [2024-12-02 12:15:58,892 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-12-02 12:15:58,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 371 events. 212/371 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1449 event pairs, 176 based on Foata normal form. 1/265 useless extension candidates. Maximal degree in co-relation 705. Up to 364 conditions per place. [2024-12-02 12:15:58,897 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-12-02 12:15:58,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 120 flow [2024-12-02 12:15:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:15:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:15:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-12-02 12:15:58,910 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45045045045045046 [2024-12-02 12:15:58,911 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 80 flow. Second operand 3 states and 50 transitions. [2024-12-02 12:15:58,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 120 flow [2024-12-02 12:15:58,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 12:15:58,918 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2024-12-02 12:15:58,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-12-02 12:15:58,922 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2024-12-02 12:15:58,922 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2024-12-02 12:15:58,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:15:58,922 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:15:58,922 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 12:15:58,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 12:15:58,923 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:15:58,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:15:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash 404355, now seen corresponding path program 1 times [2024-12-02 12:15:58,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:15:58,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874629840] [2024-12-02 12:15:58,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:15:58,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:15:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:15:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:15:59,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:15:59,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874629840] [2024-12-02 12:15:59,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874629840] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:15:59,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:15:59,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:15:59,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859353250] [2024-12-02 12:15:59,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:15:59,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:15:59,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:15:59,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:15:59,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:15:59,211 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-12-02 12:15:59,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:15:59,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:15:59,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-12-02 12:15:59,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:15:59,371 INFO L124 PetriNetUnfolderBase]: 213/374 cut-off events. [2024-12-02 12:15:59,371 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-12-02 12:15:59,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 374 events. 213/374 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1463 event pairs, 176 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 737. Up to 369 conditions per place. [2024-12-02 12:15:59,374 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 25 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-12-02 12:15:59,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 132 flow [2024-12-02 12:15:59,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:15:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:15:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 58 transitions. [2024-12-02 12:15:59,376 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3918918918918919 [2024-12-02 12:15:59,376 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 58 transitions. [2024-12-02 12:15:59,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 132 flow [2024-12-02 12:15:59,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:15:59,378 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 89 flow [2024-12-02 12:15:59,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-12-02 12:15:59,379 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2024-12-02 12:15:59,379 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 89 flow [2024-12-02 12:15:59,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:15:59,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:15:59,379 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-12-02 12:15:59,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 12:15:59,379 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:15:59,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:15:59,380 INFO L85 PathProgramCache]: Analyzing trace with hash 388597422, now seen corresponding path program 1 times [2024-12-02 12:15:59,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:15:59,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088984283] [2024-12-02 12:15:59,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:15:59,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:15:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:15:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:15:59,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:15:59,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088984283] [2024-12-02 12:15:59,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088984283] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:15:59,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135304708] [2024-12-02 12:15:59,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:15:59,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:15:59,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:15:59,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:15:59,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 12:15:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:15:59,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-12-02 12:15:59,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:15:59,785 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 [2024-12-02 12:16:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:16:00,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:16:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:16:00,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135304708] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:16:00,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:16:00,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-12-02 12:16:00,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203313141] [2024-12-02 12:16:00,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:16:00,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 12:16:00,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:16:00,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 12:16:00,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-12-02 12:16:00,163 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-12-02 12:16:00,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 89 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:00,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:16:00,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-12-02 12:16:00,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:16:00,466 INFO L124 PetriNetUnfolderBase]: 214/376 cut-off events. [2024-12-02 12:16:00,466 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-12-02 12:16:00,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775 conditions, 376 events. 214/376 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1466 event pairs, 176 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 744. Up to 366 conditions per place. [2024-12-02 12:16:00,469 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 21 selfloop transitions, 10 changer transitions 0/34 dead transitions. [2024-12-02 12:16:00,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 159 flow [2024-12-02 12:16:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 12:16:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 12:16:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-12-02 12:16:00,471 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30067567567567566 [2024-12-02 12:16:00,471 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 89 flow. Second operand 8 states and 89 transitions. [2024-12-02 12:16:00,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 159 flow [2024-12-02 12:16:00,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:16:00,473 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 114 flow [2024-12-02 12:16:00,474 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=114, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-12-02 12:16:00,474 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2024-12-02 12:16:00,475 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 114 flow [2024-12-02 12:16:00,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:00,475 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:16:00,475 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:16:00,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 12:16:00,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:16:00,676 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:16:00,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:16:00,676 INFO L85 PathProgramCache]: Analyzing trace with hash -155382003, now seen corresponding path program 1 times [2024-12-02 12:16:00,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:16:00,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206392981] [2024-12-02 12:16:00,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:16:00,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:16:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:16:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:16:00,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:16:00,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206392981] [2024-12-02 12:16:00,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206392981] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:16:00,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:16:00,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:16:00,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282814147] [2024-12-02 12:16:00,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:16:00,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:16:00,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:16:00,737 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:16:00,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:16:00,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-12-02 12:16:00,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:00,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:16:00,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-12-02 12:16:00,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:16:00,821 INFO L124 PetriNetUnfolderBase]: 166/295 cut-off events. [2024-12-02 12:16:00,821 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-12-02 12:16:00,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 295 events. 166/295 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1093 event pairs, 132 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 582. Up to 284 conditions per place. [2024-12-02 12:16:00,823 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 25 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-12-02 12:16:00,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 168 flow [2024-12-02 12:16:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:16:00,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:16:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2024-12-02 12:16:00,825 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3581081081081081 [2024-12-02 12:16:00,825 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 114 flow. Second operand 4 states and 53 transitions. [2024-12-02 12:16:00,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 168 flow [2024-12-02 12:16:00,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 126 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-12-02 12:16:00,827 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 76 flow [2024-12-02 12:16:00,827 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=32} [2024-12-02 12:16:00,827 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2024-12-02 12:16:00,827 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 76 flow [2024-12-02 12:16:00,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:00,828 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:16:00,828 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:16:00,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 12:16:00,828 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:16:00,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:16:00,829 INFO L85 PathProgramCache]: Analyzing trace with hash -155382002, now seen corresponding path program 1 times [2024-12-02 12:16:00,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:16:00,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480659365] [2024-12-02 12:16:00,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:16:00,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:16:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:16:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:16:00,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:16:00,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480659365] [2024-12-02 12:16:00,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480659365] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:16:00,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:16:00,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:16:00,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461646104] [2024-12-02 12:16:00,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:16:00,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:16:00,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:16:00,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:16:00,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:16:00,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-12-02 12:16:00,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:00,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:16:00,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-12-02 12:16:00,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:16:01,005 INFO L124 PetriNetUnfolderBase]: 233/434 cut-off events. [2024-12-02 12:16:01,006 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-12-02 12:16:01,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 434 events. 233/434 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1806 event pairs, 200 based on Foata normal form. 23/371 useless extension candidates. Maximal degree in co-relation 574. Up to 289 conditions per place. [2024-12-02 12:16:01,007 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 39 selfloop transitions, 3 changer transitions 2/47 dead transitions. [2024-12-02 12:16:01,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 198 flow [2024-12-02 12:16:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:16:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:16:01,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-12-02 12:16:01,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5202702702702703 [2024-12-02 12:16:01,009 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 76 flow. Second operand 4 states and 77 transitions. [2024-12-02 12:16:01,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 198 flow [2024-12-02 12:16:01,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 193 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:16:01,011 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 86 flow [2024-12-02 12:16:01,011 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-12-02 12:16:01,011 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2024-12-02 12:16:01,011 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 86 flow [2024-12-02 12:16:01,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:01,012 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:16:01,012 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:16:01,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 12:16:01,012 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:16:01,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:16:01,012 INFO L85 PathProgramCache]: Analyzing trace with hash -921117511, now seen corresponding path program 1 times [2024-12-02 12:16:01,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:16:01,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433655795] [2024-12-02 12:16:01,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:16:01,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:16:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:16:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:16:01,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:16:01,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433655795] [2024-12-02 12:16:01,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433655795] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:16:01,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:16:01,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:16:01,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407116963] [2024-12-02 12:16:01,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:16:01,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:16:01,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:16:01,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:16:01,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:16:01,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-12-02 12:16:01,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:01,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:16:01,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-12-02 12:16:01,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:16:01,297 INFO L124 PetriNetUnfolderBase]: 191/363 cut-off events. [2024-12-02 12:16:01,297 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-12-02 12:16:01,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 363 events. 191/363 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1464 event pairs, 162 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 472. Up to 348 conditions per place. [2024-12-02 12:16:01,299 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 23 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2024-12-02 12:16:01,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 132 flow [2024-12-02 12:16:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:16:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:16:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2024-12-02 12:16:01,300 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3716216216216216 [2024-12-02 12:16:01,300 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 86 flow. Second operand 4 states and 55 transitions. [2024-12-02 12:16:01,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 132 flow [2024-12-02 12:16:01,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 127 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:16:01,301 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 81 flow [2024-12-02 12:16:01,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=81, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-12-02 12:16:01,302 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2024-12-02 12:16:01,302 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 81 flow [2024-12-02 12:16:01,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:01,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:16:01,302 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:16:01,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 12:16:01,302 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:16:01,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:16:01,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1076627355, now seen corresponding path program 1 times [2024-12-02 12:16:01,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:16:01,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525342814] [2024-12-02 12:16:01,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:16:01,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:16:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:16:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:16:01,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:16:01,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525342814] [2024-12-02 12:16:01,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525342814] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:16:01,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:16:01,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:16:01,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552699690] [2024-12-02 12:16:01,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:16:01,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:16:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:16:01,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:16:01,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:16:01,333 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-12-02 12:16:01,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:01,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:16:01,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-12-02 12:16:01,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:16:01,428 INFO L124 PetriNetUnfolderBase]: 272/497 cut-off events. [2024-12-02 12:16:01,428 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-12-02 12:16:01,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 497 events. 272/497 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2040 event pairs, 150 based on Foata normal form. 2/424 useless extension candidates. Maximal degree in co-relation 751. Up to 315 conditions per place. [2024-12-02 12:16:01,430 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 34 selfloop transitions, 2 changer transitions 4/43 dead transitions. [2024-12-02 12:16:01,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 193 flow [2024-12-02 12:16:01,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:16:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:16:01,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-12-02 12:16:01,431 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5315315315315315 [2024-12-02 12:16:01,431 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 81 flow. Second operand 3 states and 59 transitions. [2024-12-02 12:16:01,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 193 flow [2024-12-02 12:16:01,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 43 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:16:01,433 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 84 flow [2024-12-02 12:16:01,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-12-02 12:16:01,433 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2024-12-02 12:16:01,434 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 84 flow [2024-12-02 12:16:01,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:01,434 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:16:01,434 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:16:01,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 12:16:01,434 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:16:01,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:16:01,434 INFO L85 PathProgramCache]: Analyzing trace with hash -208233304, now seen corresponding path program 1 times [2024-12-02 12:16:01,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:16:01,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769962184] [2024-12-02 12:16:01,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:16:01,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:16:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:16:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 12:16:01,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:16:01,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769962184] [2024-12-02 12:16:01,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769962184] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:16:01,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:16:01,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:16:01,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053550177] [2024-12-02 12:16:01,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:16:01,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:16:01,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:16:01,483 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:16:01,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:16:01,483 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-12-02 12:16:01,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:01,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:16:01,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-12-02 12:16:01,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:16:01,566 INFO L124 PetriNetUnfolderBase]: 252/452 cut-off events. [2024-12-02 12:16:01,566 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-12-02 12:16:01,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 452 events. 252/452 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1681 event pairs, 113 based on Foata normal form. 11/392 useless extension candidates. Maximal degree in co-relation 983. Up to 306 conditions per place. [2024-12-02 12:16:01,569 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 33 selfloop transitions, 2 changer transitions 6/44 dead transitions. [2024-12-02 12:16:01,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 199 flow [2024-12-02 12:16:01,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:16:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:16:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-12-02 12:16:01,570 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-12-02 12:16:01,570 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 84 flow. Second operand 3 states and 60 transitions. [2024-12-02 12:16:01,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 199 flow [2024-12-02 12:16:01,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:16:01,572 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 96 flow [2024-12-02 12:16:01,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-12-02 12:16:01,572 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2024-12-02 12:16:01,572 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 96 flow [2024-12-02 12:16:01,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:01,572 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:16:01,573 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:16:01,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 12:16:01,573 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:16:01,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:16:01,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1308577301, now seen corresponding path program 1 times [2024-12-02 12:16:01,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:16:01,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768462107] [2024-12-02 12:16:01,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:16:01,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:16:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:16:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:16:02,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:16:02,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768462107] [2024-12-02 12:16:02,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768462107] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:16:02,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136695447] [2024-12-02 12:16:02,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:16:02,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:16:02,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:16:02,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:16:02,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 12:16:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:16:02,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-12-02 12:16:02,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:16:02,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2024-12-02 12:16:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:16:02,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:16:02,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-12-02 12:16:02,711 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 12:16:02,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2024-12-02 12:16:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:16:02,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136695447] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:16:02,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:16:02,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-12-02 12:16:02,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535649427] [2024-12-02 12:16:02,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:16:02,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 12:16:02,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:16:02,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 12:16:02,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-12-02 12:16:02,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-12-02 12:16:02,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 96 flow. Second operand has 16 states, 16 states have (on average 11.5625) internal successors, (185), 16 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:02,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:16:02,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-12-02 12:16:02,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:16:03,646 INFO L124 PetriNetUnfolderBase]: 911/1624 cut-off events. [2024-12-02 12:16:03,646 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2024-12-02 12:16:03,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3774 conditions, 1624 events. 911/1624 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 8317 event pairs, 351 based on Foata normal form. 3/1376 useless extension candidates. Maximal degree in co-relation 2339. Up to 440 conditions per place. [2024-12-02 12:16:03,653 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 90 selfloop transitions, 18 changer transitions 39/150 dead transitions. [2024-12-02 12:16:03,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 150 transitions, 715 flow [2024-12-02 12:16:03,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 12:16:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 12:16:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 260 transitions. [2024-12-02 12:16:03,655 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5019305019305019 [2024-12-02 12:16:03,655 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 96 flow. Second operand 14 states and 260 transitions. [2024-12-02 12:16:03,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 150 transitions, 715 flow [2024-12-02 12:16:03,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 150 transitions, 702 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-12-02 12:16:03,658 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 214 flow [2024-12-02 12:16:03,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=214, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-12-02 12:16:03,659 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2024-12-02 12:16:03,659 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 214 flow [2024-12-02 12:16:03,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.5625) internal successors, (185), 16 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:03,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:16:03,659 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:16:03,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 12:16:03,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:16:03,860 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:16:03,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:16:03,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1549850626, now seen corresponding path program 2 times [2024-12-02 12:16:03,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:16:03,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349703648] [2024-12-02 12:16:03,861 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:16:03,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:16:03,884 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:16:03,884 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:16:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 12:16:03,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:16:03,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349703648] [2024-12-02 12:16:03,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349703648] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:16:03,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:16:03,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:16:03,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197077811] [2024-12-02 12:16:03,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:16:03,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:16:03,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:16:03,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:16:03,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:16:03,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-12-02 12:16:03,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:03,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:16:03,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-12-02 12:16:03,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:16:04,211 INFO L124 PetriNetUnfolderBase]: 1628/2879 cut-off events. [2024-12-02 12:16:04,211 INFO L125 PetriNetUnfolderBase]: For 2371/2371 co-relation queries the response was YES. [2024-12-02 12:16:04,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7071 conditions, 2879 events. 1628/2879 cut-off events. For 2371/2371 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 16065 event pairs, 590 based on Foata normal form. 33/2464 useless extension candidates. Maximal degree in co-relation 6030. Up to 1080 conditions per place. [2024-12-02 12:16:04,219 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 62 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-12-02 12:16:04,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 79 transitions, 532 flow [2024-12-02 12:16:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:16:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:16:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-12-02 12:16:04,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5743243243243243 [2024-12-02 12:16:04,220 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 214 flow. Second operand 4 states and 85 transitions. [2024-12-02 12:16:04,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 79 transitions, 532 flow [2024-12-02 12:16:04,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 512 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-12-02 12:16:04,226 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 356 flow [2024-12-02 12:16:04,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=356, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-12-02 12:16:04,227 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2024-12-02 12:16:04,227 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 356 flow [2024-12-02 12:16:04,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:04,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:16:04,227 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:16:04,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 12:16:04,227 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:16:04,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:16:04,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2119074636, now seen corresponding path program 3 times [2024-12-02 12:16:04,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:16:04,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368211873] [2024-12-02 12:16:04,228 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:16:04,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:16:04,242 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 12:16:04,243 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:16:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-12-02 12:16:04,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:16:04,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368211873] [2024-12-02 12:16:04,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368211873] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:16:04,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:16:04,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:16:04,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390170513] [2024-12-02 12:16:04,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:16:04,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:16:04,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:16:04,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:16:04,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:16:04,296 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-12-02 12:16:04,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 356 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:04,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:16:04,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-12-02 12:16:04,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:16:04,702 INFO L124 PetriNetUnfolderBase]: 2246/3945 cut-off events. [2024-12-02 12:16:04,702 INFO L125 PetriNetUnfolderBase]: For 5685/5685 co-relation queries the response was YES. [2024-12-02 12:16:04,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10435 conditions, 3945 events. 2246/3945 cut-off events. For 5685/5685 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 22966 event pairs, 580 based on Foata normal form. 3/3331 useless extension candidates. Maximal degree in co-relation 7321. Up to 1316 conditions per place. [2024-12-02 12:16:04,718 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 65 selfloop transitions, 17 changer transitions 12/97 dead transitions. [2024-12-02 12:16:04,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 97 transitions, 747 flow [2024-12-02 12:16:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:16:04,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 12:16:04,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-12-02 12:16:04,720 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5513513513513514 [2024-12-02 12:16:04,720 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 356 flow. Second operand 5 states and 102 transitions. [2024-12-02 12:16:04,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 97 transitions, 747 flow [2024-12-02 12:16:04,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 97 transitions, 707 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-12-02 12:16:04,734 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 446 flow [2024-12-02 12:16:04,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=446, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-12-02 12:16:04,735 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2024-12-02 12:16:04,735 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 446 flow [2024-12-02 12:16:04,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:04,735 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:16:04,735 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:16:04,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 12:16:04,735 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:16:04,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:16:04,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1854770607, now seen corresponding path program 4 times [2024-12-02 12:16:04,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:16:04,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221990179] [2024-12-02 12:16:04,736 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:16:04,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:16:04,757 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:16:04,757 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:16:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 12:16:04,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:16:04,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221990179] [2024-12-02 12:16:04,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221990179] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:16:04,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689932247] [2024-12-02 12:16:04,954 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:16:04,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:16:04,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:16:04,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:16:04,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 12:16:05,041 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:16:05,042 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:16:05,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 12:16:05,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:16:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 12:16:05,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:16:05,161 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-12-02 12:16:05,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-12-02 12:16:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 12:16:05,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689932247] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:16:05,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:16:05,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-12-02 12:16:05,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732560016] [2024-12-02 12:16:05,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:16:05,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 12:16:05,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:16:05,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 12:16:05,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-12-02 12:16:05,188 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-12-02 12:16:05,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 446 flow. Second operand has 11 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:05,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:16:05,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-12-02 12:16:05,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:16:06,364 INFO L124 PetriNetUnfolderBase]: 5683/9816 cut-off events. [2024-12-02 12:16:06,365 INFO L125 PetriNetUnfolderBase]: For 19349/19349 co-relation queries the response was YES. [2024-12-02 12:16:06,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26796 conditions, 9816 events. 5683/9816 cut-off events. For 19349/19349 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 64471 event pairs, 892 based on Foata normal form. 46/8336 useless extension candidates. Maximal degree in co-relation 14380. Up to 1775 conditions per place. [2024-12-02 12:16:06,396 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 110 selfloop transitions, 69 changer transitions 54/236 dead transitions. [2024-12-02 12:16:06,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 236 transitions, 1903 flow [2024-12-02 12:16:06,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 12:16:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 12:16:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 285 transitions. [2024-12-02 12:16:06,398 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5925155925155925 [2024-12-02 12:16:06,398 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 446 flow. Second operand 13 states and 285 transitions. [2024-12-02 12:16:06,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 236 transitions, 1903 flow [2024-12-02 12:16:06,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 236 transitions, 1844 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-12-02 12:16:06,414 INFO L231 Difference]: Finished difference. Result has 78 places, 107 transitions, 1393 flow [2024-12-02 12:16:06,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1393, PETRI_PLACES=78, PETRI_TRANSITIONS=107} [2024-12-02 12:16:06,415 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2024-12-02 12:16:06,415 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 107 transitions, 1393 flow [2024-12-02 12:16:06,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:06,415 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:16:06,415 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:16:06,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 12:16:06,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:16:06,616 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:16:06,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:16:06,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2124753264, now seen corresponding path program 5 times [2024-12-02 12:16:06,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:16:06,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291216201] [2024-12-02 12:16:06,617 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:16:06,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:16:06,642 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 12:16:06,642 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:16:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 12:16:06,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:16:06,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291216201] [2024-12-02 12:16:06,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291216201] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:16:06,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949025360] [2024-12-02 12:16:06,760 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:16:06,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:16:06,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:16:06,761 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:16:06,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 12:16:06,841 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 12:16:06,842 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:16:06,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 12:16:06,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:16:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 12:16:06,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:16:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 12:16:07,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949025360] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:16:07,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:16:07,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-12-02 12:16:07,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359311600] [2024-12-02 12:16:07,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:16:07,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 12:16:07,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:16:07,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 12:16:07,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-12-02 12:16:07,194 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-12-02 12:16:07,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 107 transitions, 1393 flow. Second operand has 18 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:07,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:16:07,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-12-02 12:16:07,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:16:08,697 INFO L124 PetriNetUnfolderBase]: 6845/12016 cut-off events. [2024-12-02 12:16:08,697 INFO L125 PetriNetUnfolderBase]: For 38209/38209 co-relation queries the response was YES. [2024-12-02 12:16:08,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33392 conditions, 12016 events. 6845/12016 cut-off events. For 38209/38209 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 85281 event pairs, 2661 based on Foata normal form. 286/10396 useless extension candidates. Maximal degree in co-relation 32087. Up to 4726 conditions per place. [2024-12-02 12:16:08,731 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 71 selfloop transitions, 9 changer transitions 106/189 dead transitions. [2024-12-02 12:16:08,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 189 transitions, 2117 flow [2024-12-02 12:16:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 12:16:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 12:16:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-12-02 12:16:08,733 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2024-12-02 12:16:08,733 INFO L175 Difference]: Start difference. First operand has 78 places, 107 transitions, 1393 flow. Second operand 11 states and 187 transitions. [2024-12-02 12:16:08,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 189 transitions, 2117 flow [2024-12-02 12:16:08,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 189 transitions, 1677 flow, removed 220 selfloop flow, removed 0 redundant places. [2024-12-02 12:16:08,892 INFO L231 Difference]: Finished difference. Result has 93 places, 76 transitions, 717 flow [2024-12-02 12:16:08,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=717, PETRI_PLACES=93, PETRI_TRANSITIONS=76} [2024-12-02 12:16:08,892 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2024-12-02 12:16:08,892 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 76 transitions, 717 flow [2024-12-02 12:16:08,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:08,893 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:16:08,893 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:16:08,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 12:16:09,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:16:09,094 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 12:16:09,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:16:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash -358307259, now seen corresponding path program 6 times [2024-12-02 12:16:09,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:16:09,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669999073] [2024-12-02 12:16:09,094 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:16:09,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:16:09,158 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-12-02 12:16:09,158 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:16:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-02 12:16:09,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:16:09,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669999073] [2024-12-02 12:16:09,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669999073] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:16:09,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235673334] [2024-12-02 12:16:09,545 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:16:09,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:16:09,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:16:09,548 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:16:09,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 12:16:09,931 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-12-02 12:16:09,932 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:16:09,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-12-02 12:16:09,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:16:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 12:16:10,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:16:10,489 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 12:16:10,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-12-02 12:16:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 12:16:10,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235673334] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:16:10,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:16:10,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-12-02 12:16:10,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318929053] [2024-12-02 12:16:10,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:16:10,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 12:16:10,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:16:10,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 12:16:10,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-12-02 12:16:10,666 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-12-02 12:16:10,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 76 transitions, 717 flow. Second operand has 23 states, 23 states have (on average 12.08695652173913) internal successors, (278), 23 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:10,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:16:10,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-12-02 12:16:10,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:16:12,574 INFO L124 PetriNetUnfolderBase]: 6393/10991 cut-off events. [2024-12-02 12:16:12,575 INFO L125 PetriNetUnfolderBase]: For 20100/20100 co-relation queries the response was YES. [2024-12-02 12:16:12,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29081 conditions, 10991 events. 6393/10991 cut-off events. For 20100/20100 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 71023 event pairs, 1090 based on Foata normal form. 32/9321 useless extension candidates. Maximal degree in co-relation 27666. Up to 2000 conditions per place. [2024-12-02 12:16:12,606 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 0 selfloop transitions, 0 changer transitions 291/291 dead transitions. [2024-12-02 12:16:12,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 291 transitions, 2405 flow [2024-12-02 12:16:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 12:16:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-12-02 12:16:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 343 transitions. [2024-12-02 12:16:12,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.515015015015015 [2024-12-02 12:16:12,609 INFO L175 Difference]: Start difference. First operand has 93 places, 76 transitions, 717 flow. Second operand 18 states and 343 transitions. [2024-12-02 12:16:12,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 291 transitions, 2405 flow [2024-12-02 12:16:12,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 291 transitions, 1783 flow, removed 221 selfloop flow, removed 23 redundant places. [2024-12-02 12:16:12,763 INFO L231 Difference]: Finished difference. Result has 77 places, 0 transitions, 0 flow [2024-12-02 12:16:12,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=77, PETRI_TRANSITIONS=0} [2024-12-02 12:16:12,764 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 41 predicate places. [2024-12-02 12:16:12,764 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 0 transitions, 0 flow [2024-12-02 12:16:12,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.08695652173913) internal successors, (278), 23 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:16:12,767 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 14 remaining) [2024-12-02 12:16:12,768 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-12-02 12:16:12,768 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-12-02 12:16:12,768 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2024-12-02 12:16:12,768 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2024-12-02 12:16:12,768 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2024-12-02 12:16:12,768 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (7 of 14 remaining) [2024-12-02 12:16:12,768 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2024-12-02 12:16:12,768 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2024-12-02 12:16:12,768 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 14 remaining) [2024-12-02 12:16:12,768 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2024-12-02 12:16:12,769 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-12-02 12:16:12,769 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2024-12-02 12:16:12,769 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2024-12-02 12:16:12,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 12:16:12,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 12:16:12,970 INFO L422 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:16:12,976 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-12-02 12:16:12,976 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-12-02 12:16:12,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:16:12 BasicIcfg [2024-12-02 12:16:12,982 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-12-02 12:16:12,983 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-12-02 12:16:12,983 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-12-02 12:16:12,983 INFO L274 PluginConnector]: Witness Printer initialized [2024-12-02 12:16:12,984 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:15:58" (3/4) ... [2024-12-02 12:16:12,986 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-12-02 12:16:12,989 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2024-12-02 12:16:12,989 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2024-12-02 12:16:12,995 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 79 nodes and edges [2024-12-02 12:16:12,995 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2024-12-02 12:16:12,995 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2024-12-02 12:16:12,995 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-12-02 12:16:13,088 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/witness.graphml [2024-12-02 12:16:13,088 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/witness.yml [2024-12-02 12:16:13,088 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-12-02 12:16:13,089 INFO L158 Benchmark]: Toolchain (without parser) took 15588.56ms. Allocated memory was 117.4MB in the beginning and 872.4MB in the end (delta: 755.0MB). Free memory was 92.1MB in the beginning and 546.9MB in the end (delta: -454.8MB). Peak memory consumption was 301.7MB. Max. memory is 16.1GB. [2024-12-02 12:16:13,090 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 117.4MB. Free memory is still 73.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 12:16:13,090 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.89ms. Allocated memory is still 117.4MB. Free memory was 92.1MB in the beginning and 80.6MB in the end (delta: 11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 12:16:13,091 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.03ms. Allocated memory is still 117.4MB. Free memory was 80.3MB in the beginning and 78.9MB in the end (delta: 1.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 12:16:13,091 INFO L158 Benchmark]: Boogie Preprocessor took 40.25ms. Allocated memory is still 117.4MB. Free memory was 78.9MB in the beginning and 76.9MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 12:16:13,091 INFO L158 Benchmark]: RCFGBuilder took 539.01ms. Allocated memory is still 117.4MB. Free memory was 76.9MB in the beginning and 41.6MB in the end (delta: 35.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-12-02 12:16:13,091 INFO L158 Benchmark]: TraceAbstraction took 14671.07ms. Allocated memory was 117.4MB in the beginning and 872.4MB in the end (delta: 755.0MB). Free memory was 41.1MB in the beginning and 554.6MB in the end (delta: -513.6MB). Peak memory consumption was 360.4MB. Max. memory is 16.1GB. [2024-12-02 12:16:13,092 INFO L158 Benchmark]: Witness Printer took 105.35ms. Allocated memory is still 872.4MB. Free memory was 554.6MB in the beginning and 546.9MB in the end (delta: 7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 12:16:13,093 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 117.4MB. Free memory is still 73.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 193.89ms. Allocated memory is still 117.4MB. Free memory was 92.1MB in the beginning and 80.6MB in the end (delta: 11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.03ms. Allocated memory is still 117.4MB. Free memory was 80.3MB in the beginning and 78.9MB in the end (delta: 1.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.25ms. Allocated memory is still 117.4MB. Free memory was 78.9MB in the beginning and 76.9MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 539.01ms. Allocated memory is still 117.4MB. Free memory was 76.9MB in the beginning and 41.6MB in the end (delta: 35.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * TraceAbstraction took 14671.07ms. Allocated memory was 117.4MB in the beginning and 872.4MB in the end (delta: 755.0MB). Free memory was 41.1MB in the beginning and 554.6MB in the end (delta: -513.6MB). Peak memory consumption was 360.4MB. Max. memory is 16.1GB. * Witness Printer took 105.35ms. Allocated memory is still 872.4MB. Free memory was 554.6MB in the beginning and 546.9MB in the end (delta: 7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 70]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 51 locations, 14 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.6s, OverallIterations: 14, TraceHistogramMax: 4, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1310 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1282 mSDsluCounter, 162 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 161 mSDsCounter, 88 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2199 IncrementalHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 88 mSolverCounterUnsat, 1 mSDtfsCounter, 2199 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 389 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1393occurred in iteration=12, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 427 NumberOfCodeBlocks, 420 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 550 ConstructedInterpolants, 20 QuantifiedInterpolants, 4477 SizeOfPredicates, 37 NumberOfNonLiveVariables, 856 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 24 InterpolantComputations, 9 PerfectInterpolantSequences, 275/397 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-12-02 12:16:13,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce622ef-890c-4b66-9775-f8ca6ec5635c/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE