./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i --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_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/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_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/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_f6a1feb3-27fe-456a-8d88-814b77ff33dc/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 ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 06:33:35,781 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 06:33:35,857 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 06:33:35,864 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 06:33:35,864 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 06:33:35,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 06:33:35,894 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 06:33:35,894 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 06:33:35,895 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 06:33:35,895 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 06:33:35,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 06:33:35,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 06:33:35,895 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 06:33:35,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 06:33:35,896 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 06:33:35,896 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 06:33:35,896 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 06:33:35,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 06:33:35,896 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 06:33:35,896 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 06:33:35,897 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 06:33:35,897 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 06:33:35,897 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 06:33:35,897 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 06:33:35,897 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 06:33:35,897 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 06:33:35,897 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 06:33:35,897 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 06:33:35,897 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 06:33:35,898 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 06:33:35,898 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 06:33:35,898 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 06:33:35,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 06:33:35,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 06:33:35,898 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 06:33:35,898 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 06:33:35,899 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 06:33:35,899 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 06:33:35,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 06:33:35,899 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 06:33:35,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 06:33:35,899 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 06:33:35,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 06:33:35,899 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 06:33:35,899 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 06:33:35,900 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 06:33:35,900 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 06:33:35,900 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_f6a1feb3-27fe-456a-8d88-814b77ff33dc/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 -> ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 [2024-12-02 06:33:36,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 06:33:36,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 06:33:36,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 06:33:36,215 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 06:33:36,216 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 06:33:36,217 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2024-12-02 06:33:39,555 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/data/4283112ca/06397f7890e14731a3197e74486a9924/FLAG75fd614fc [2024-12-02 06:33:39,858 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 06:33:39,859 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2024-12-02 06:33:39,875 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/data/4283112ca/06397f7890e14731a3197e74486a9924/FLAG75fd614fc [2024-12-02 06:33:40,140 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/data/4283112ca/06397f7890e14731a3197e74486a9924 [2024-12-02 06:33:40,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 06:33:40,143 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 06:33:40,145 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 06:33:40,145 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 06:33:40,149 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 06:33:40,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,151 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74aba5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40, skipping insertion in model container [2024-12-02 06:33:40,151 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,192 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 06:33:40,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 06:33:40,676 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 06:33:40,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 06:33:40,795 INFO L204 MainTranslator]: Completed translation [2024-12-02 06:33:40,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40 WrapperNode [2024-12-02 06:33:40,796 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 06:33:40,797 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 06:33:40,797 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 06:33:40,797 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 06:33:40,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,841 INFO L138 Inliner]: procedures = 263, calls = 70, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 129 [2024-12-02 06:33:40,842 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 06:33:40,842 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 06:33:40,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 06:33:40,842 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 06:33:40,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,856 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,873 INFO L175 MemorySlicer]: Split 64 memory accesses to 1 slices as follows [64]. 100 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [60]. The 2 writes are split as follows [2]. [2024-12-02 06:33:40,874 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,874 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,883 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,884 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,888 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,889 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,891 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,893 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 06:33:40,894 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 06:33:40,895 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 06:33:40,895 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 06:33:40,896 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (1/1) ... [2024-12-02 06:33:40,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 06:33:40,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:33:40,935 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 06:33:40,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 06:33:40,969 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-12-02 06:33:40,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 06:33:40,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 06:33:40,969 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-12-02 06:33:40,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 06:33:40,969 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-12-02 06:33:40,969 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-12-02 06:33:40,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 06:33:40,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 06:33:40,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 06:33:40,971 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 06:33:41,114 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 06:33:41,116 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 06:33:41,438 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 06:33:41,438 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 06:33:41,781 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 06:33:41,781 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-12-02 06:33:41,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:33:41 BoogieIcfgContainer [2024-12-02 06:33:41,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 06:33:41,785 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 06:33:41,785 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 06:33:41,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 06:33:41,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:33:40" (1/3) ... [2024-12-02 06:33:41,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79838a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:33:41, skipping insertion in model container [2024-12-02 06:33:41,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:40" (2/3) ... [2024-12-02 06:33:41,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79838a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:33:41, skipping insertion in model container [2024-12-02 06:33:41,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:33:41" (3/3) ... [2024-12-02 06:33:41,794 INFO L128 eAbstractionObserver]: Analyzing ICFG 06-symbeq_02-funloop_norace.i [2024-12-02 06:33:41,813 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 06:33:41,815 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 06-symbeq_02-funloop_norace.i that has 2 procedures, 31 locations, 1 initial locations, 3 loop locations, and 9 error locations. [2024-12-02 06:33:41,815 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 06:33:41,867 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-12-02 06:33:41,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 70 flow [2024-12-02 06:33:41,944 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2024-12-02 06:33:41,947 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 06:33:41,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 32 events. 3/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 74 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-12-02 06:33:41,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 33 transitions, 70 flow [2024-12-02 06:33:41,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 32 transitions, 67 flow [2024-12-02 06:33:41,965 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 06:33:41,979 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;@185e3229, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 06:33:41,979 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-12-02 06:33:41,988 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 06:33:41,988 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-12-02 06:33:41,989 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 06:33:41,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:33:41,989 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 06:33:41,990 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 06:33:41,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:33:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2073655235, now seen corresponding path program 1 times [2024-12-02 06:33:42,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:33:42,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558248767] [2024-12-02 06:33:42,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:42,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:33:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:42,308 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 06:33:42,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:33:42,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558248767] [2024-12-02 06:33:42,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558248767] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:33:42,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:33:42,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 06:33:42,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955717651] [2024-12-02 06:33:42,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:33:42,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 06:33:42,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:33:42,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 06:33:42,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 06:33:42,352 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2024-12-02 06:33:42,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 06:33:42,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:33:42,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2024-12-02 06:33:42,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:33:42,497 INFO L124 PetriNetUnfolderBase]: 74/203 cut-off events. [2024-12-02 06:33:42,497 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 06:33:42,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 203 events. 74/203 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 913 event pairs, 56 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 342. Up to 149 conditions per place. [2024-12-02 06:33:42,501 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 20 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-12-02 06:33:42,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 33 transitions, 113 flow [2024-12-02 06:33:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 06:33:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 06:33:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-12-02 06:33:42,517 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-12-02 06:33:42,519 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 67 flow. Second operand 3 states and 59 transitions. [2024-12-02 06:33:42,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 33 transitions, 113 flow [2024-12-02 06:33:42,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 112 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 06:33:42,528 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 78 flow [2024-12-02 06:33:42,531 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-12-02 06:33:42,535 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2024-12-02 06:33:42,535 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 78 flow [2024-12-02 06:33:42,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 06:33:42,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:33:42,536 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:33:42,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 06:33:42,536 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 06:33:42,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:33:42,537 INFO L85 PathProgramCache]: Analyzing trace with hash -204016993, now seen corresponding path program 1 times [2024-12-02 06:33:42,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:33:42,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747670230] [2024-12-02 06:33:42,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:42,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:33:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:33:42,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:33:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747670230] [2024-12-02 06:33:42,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747670230] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:33:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195438554] [2024-12-02 06:33:42,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:42,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:33:42,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:33:42,665 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:33:42,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 06:33:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:42,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 06:33:42,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:33:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 06:33:42,800 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:33:42,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195438554] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:33:42,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:33:42,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2024-12-02 06:33:42,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572247599] [2024-12-02 06:33:42,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:33:42,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 06:33:42,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:33:42,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 06:33:42,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:33:42,817 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 33 [2024-12-02 06:33:42,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 06:33:42,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:33:42,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 33 [2024-12-02 06:33:42,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:33:42,914 INFO L124 PetriNetUnfolderBase]: 74/199 cut-off events. [2024-12-02 06:33:42,914 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 06:33:42,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 199 events. 74/199 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 876 event pairs, 56 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 348. Up to 149 conditions per place. [2024-12-02 06:33:42,917 INFO L140 encePairwiseOnDemand]: 31/33 looper letters, 21 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2024-12-02 06:33:42,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 120 flow [2024-12-02 06:33:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 06:33:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 06:33:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-12-02 06:33:42,919 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-12-02 06:33:42,919 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 78 flow. Second operand 3 states and 55 transitions. [2024-12-02 06:33:42,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 120 flow [2024-12-02 06:33:42,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 116 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 06:33:42,921 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 74 flow [2024-12-02 06:33:42,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-12-02 06:33:42,922 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2024-12-02 06:33:42,922 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 74 flow [2024-12-02 06:33:42,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 06:33:42,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:33:42,923 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:33:42,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 06:33:43,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:33:43,124 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 06:33:43,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:33:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1523767520, now seen corresponding path program 1 times [2024-12-02 06:33:43,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:33:43,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41773408] [2024-12-02 06:33:43,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:43,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:33:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:33:43,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:33:43,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41773408] [2024-12-02 06:33:43,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41773408] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:33:43,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670153704] [2024-12-02 06:33:43,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:43,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:33:43,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:33:43,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:33:43,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 06:33:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:43,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:33:43,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:33:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:33:43,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:33:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:33:43,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670153704] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:33:43,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:33:43,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-12-02 06:33:43,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482077224] [2024-12-02 06:33:43,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:33:43,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 06:33:43,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:33:43,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 06:33:43,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:33:43,430 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2024-12-02 06:33:43,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:33:43,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:33:43,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2024-12-02 06:33:43,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:33:43,531 INFO L124 PetriNetUnfolderBase]: 74/202 cut-off events. [2024-12-02 06:33:43,531 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 06:33:43,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 202 events. 74/202 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 876 event pairs, 56 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 359. Up to 149 conditions per place. [2024-12-02 06:33:43,534 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 20 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-12-02 06:33:43,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 136 flow [2024-12-02 06:33:43,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:33:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 06:33:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-12-02 06:33:43,536 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5050505050505051 [2024-12-02 06:33:43,536 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 74 flow. Second operand 6 states and 100 transitions. [2024-12-02 06:33:43,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 136 flow [2024-12-02 06:33:43,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 06:33:43,538 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 109 flow [2024-12-02 06:33:43,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=34, 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=6, PETRI_FLOW=109, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-12-02 06:33:43,539 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 9 predicate places. [2024-12-02 06:33:43,539 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 109 flow [2024-12-02 06:33:43,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:33:43,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:33:43,540 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:33:43,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 06:33:43,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:33:43,741 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 06:33:43,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:33:43,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1994701828, now seen corresponding path program 2 times [2024-12-02 06:33:43,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:33:43,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617764258] [2024-12-02 06:33:43,742 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:33:43,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:33:43,769 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 06:33:43,769 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:33:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 06:33:43,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:33:43,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617764258] [2024-12-02 06:33:43,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617764258] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:33:43,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:33:43,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 06:33:43,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609703145] [2024-12-02 06:33:43,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:33:43,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:33:43,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:33:43,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:33:43,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 06:33:43,916 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-12-02 06:33:43,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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 06:33:43,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:33:43,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-12-02 06:33:43,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:33:44,028 INFO L124 PetriNetUnfolderBase]: 74/194 cut-off events. [2024-12-02 06:33:44,028 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 06:33:44,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 194 events. 74/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 788 event pairs, 16 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 362. Up to 90 conditions per place. [2024-12-02 06:33:44,030 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 31 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2024-12-02 06:33:44,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 191 flow [2024-12-02 06:33:44,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:33:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 06:33:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-12-02 06:33:44,032 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-12-02 06:33:44,032 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 109 flow. Second operand 4 states and 72 transitions. [2024-12-02 06:33:44,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 191 flow [2024-12-02 06:33:44,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 177 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-12-02 06:33:44,035 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 97 flow [2024-12-02 06:33:44,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-12-02 06:33:44,036 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 9 predicate places. [2024-12-02 06:33:44,036 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 97 flow [2024-12-02 06:33:44,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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 06:33:44,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:33:44,037 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:33:44,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 06:33:44,037 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 06:33:44,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:33:44,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1994701829, now seen corresponding path program 1 times [2024-12-02 06:33:44,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:33:44,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644285997] [2024-12-02 06:33:44,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:44,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:33:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:33:44,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:33:44,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644285997] [2024-12-02 06:33:44,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644285997] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:33:44,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368607483] [2024-12-02 06:33:44,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:44,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:33:44,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:33:44,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:33:44,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 06:33:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:44,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 06:33:44,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:33:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:33:44,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:33:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:33:44,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368607483] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:33:44,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:33:44,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-12-02 06:33:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823054485] [2024-12-02 06:33:44,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:33:44,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 06:33:44,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:33:44,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 06:33:44,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-12-02 06:33:44,389 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2024-12-02 06:33:44,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 97 flow. Second operand has 13 states, 13 states have (on average 13.384615384615385) internal successors, (174), 13 states have internal predecessors, (174), 0 states have call successors, (0), 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 06:33:44,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:33:44,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2024-12-02 06:33:44,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:33:44,557 INFO L124 PetriNetUnfolderBase]: 74/200 cut-off events. [2024-12-02 06:33:44,558 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-12-02 06:33:44,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 200 events. 74/200 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 790 event pairs, 56 based on Foata normal form. 6/184 useless extension candidates. Maximal degree in co-relation 398. Up to 149 conditions per place. [2024-12-02 06:33:44,560 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 20 selfloop transitions, 11 changer transitions 0/39 dead transitions. [2024-12-02 06:33:44,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 39 transitions, 195 flow [2024-12-02 06:33:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 06:33:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 06:33:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2024-12-02 06:33:44,564 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-12-02 06:33:44,564 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 97 flow. Second operand 12 states and 181 transitions. [2024-12-02 06:33:44,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 39 transitions, 195 flow [2024-12-02 06:33:44,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 39 transitions, 189 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 06:33:44,567 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 175 flow [2024-12-02 06:33:44,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=175, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2024-12-02 06:33:44,568 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2024-12-02 06:33:44,568 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 175 flow [2024-12-02 06:33:44,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.384615384615385) internal successors, (174), 13 states have internal predecessors, (174), 0 states have call successors, (0), 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 06:33:44,569 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:33:44,569 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:33:44,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 06:33:44,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:33:44,770 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 06:33:44,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:33:44,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1632612731, now seen corresponding path program 2 times [2024-12-02 06:33:44,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:33:44,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371189185] [2024-12-02 06:33:44,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:33:44,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:33:44,796 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 06:33:44,796 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:33:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:44,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:33:44,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371189185] [2024-12-02 06:33:44,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371189185] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:33:44,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:33:44,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 06:33:44,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546727889] [2024-12-02 06:33:44,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:33:44,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:33:44,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:33:44,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:33:44,974 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:33:45,015 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-12-02 06:33:45,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 06:33:45,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:33:45,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-12-02 06:33:45,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:33:45,223 INFO L124 PetriNetUnfolderBase]: 146/330 cut-off events. [2024-12-02 06:33:45,223 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-12-02 06:33:45,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 330 events. 146/330 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1243 event pairs, 72 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 677. Up to 194 conditions per place. [2024-12-02 06:33:45,227 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 53 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-12-02 06:33:45,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 337 flow [2024-12-02 06:33:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:33:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 06:33:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-12-02 06:33:45,229 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-12-02 06:33:45,229 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 175 flow. Second operand 5 states and 100 transitions. [2024-12-02 06:33:45,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 337 flow [2024-12-02 06:33:45,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 289 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-12-02 06:33:45,235 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 153 flow [2024-12-02 06:33:45,235 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2024-12-02 06:33:45,236 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 24 predicate places. [2024-12-02 06:33:45,236 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 153 flow [2024-12-02 06:33:45,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 06:33:45,236 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:33:45,236 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:33:45,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 06:33:45,237 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 06:33:45,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:33:45,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1648239280, now seen corresponding path program 1 times [2024-12-02 06:33:45,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:33:45,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534139653] [2024-12-02 06:33:45,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:45,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:33:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:45,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:33:45,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534139653] [2024-12-02 06:33:45,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534139653] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:33:45,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:33:45,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 06:33:45,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140055359] [2024-12-02 06:33:45,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:33:45,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:33:45,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:33:45,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:33:45,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 06:33:45,396 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-12-02 06:33:45,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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 06:33:45,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:33:45,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-12-02 06:33:45,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:33:45,521 INFO L124 PetriNetUnfolderBase]: 128/323 cut-off events. [2024-12-02 06:33:45,521 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-12-02 06:33:45,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 323 events. 128/323 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1312 event pairs, 39 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 691. Up to 140 conditions per place. [2024-12-02 06:33:45,524 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 40 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2024-12-02 06:33:45,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 271 flow [2024-12-02 06:33:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:33:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 06:33:45,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-12-02 06:33:45,525 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2024-12-02 06:33:45,526 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 153 flow. Second operand 4 states and 71 transitions. [2024-12-02 06:33:45,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 271 flow [2024-12-02 06:33:45,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 265 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 06:33:45,530 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 151 flow [2024-12-02 06:33:45,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2024-12-02 06:33:45,531 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2024-12-02 06:33:45,531 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 151 flow [2024-12-02 06:33:45,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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 06:33:45,531 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:33:45,531 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:33:45,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 06:33:45,532 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 06:33:45,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:33:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1648239279, now seen corresponding path program 1 times [2024-12-02 06:33:45,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:33:45,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249384974] [2024-12-02 06:33:45,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:45,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:33:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:45,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:33:45,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249384974] [2024-12-02 06:33:45,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249384974] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:33:45,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:33:45,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 06:33:45,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658376573] [2024-12-02 06:33:45,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:33:45,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:33:45,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:33:45,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:33:45,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:33:45,809 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-12-02 06:33:45,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 06:33:45,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:33:45,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-12-02 06:33:45,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:33:46,041 INFO L124 PetriNetUnfolderBase]: 240/530 cut-off events. [2024-12-02 06:33:46,042 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-12-02 06:33:46,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1244 conditions, 530 events. 240/530 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2237 event pairs, 112 based on Foata normal form. 14/499 useless extension candidates. Maximal degree in co-relation 1223. Up to 322 conditions per place. [2024-12-02 06:33:46,046 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 57 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-12-02 06:33:46,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 357 flow [2024-12-02 06:33:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:33:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 06:33:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-12-02 06:33:46,048 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.593939393939394 [2024-12-02 06:33:46,048 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 151 flow. Second operand 5 states and 98 transitions. [2024-12-02 06:33:46,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 357 flow [2024-12-02 06:33:46,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 347 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 06:33:46,051 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 171 flow [2024-12-02 06:33:46,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2024-12-02 06:33:46,052 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 26 predicate places. [2024-12-02 06:33:46,052 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 171 flow [2024-12-02 06:33:46,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 06:33:46,052 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:33:46,052 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:33:46,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 06:33:46,053 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 06:33:46,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:33:46,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1315533835, now seen corresponding path program 1 times [2024-12-02 06:33:46,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:33:46,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934231304] [2024-12-02 06:33:46,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:46,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:33:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:46,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:33:46,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934231304] [2024-12-02 06:33:46,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934231304] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:33:46,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061757366] [2024-12-02 06:33:46,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:46,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:33:46,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:33:46,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:33:46,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 06:33:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:46,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 06:33:46,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:33:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:46,757 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:33:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:46,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061757366] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:33:46,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:33:46,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-12-02 06:33:46,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644208001] [2024-12-02 06:33:46,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:33:46,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 06:33:46,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:33:46,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 06:33:46,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-12-02 06:33:47,101 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-12-02 06:33:47,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 171 flow. Second operand has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 0 states have call successors, (0), 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 06:33:47,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:33:47,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-12-02 06:33:47,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:33:47,777 INFO L124 PetriNetUnfolderBase]: 478/1044 cut-off events. [2024-12-02 06:33:47,777 INFO L125 PetriNetUnfolderBase]: For 404/404 co-relation queries the response was YES. [2024-12-02 06:33:47,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2507 conditions, 1044 events. 478/1044 cut-off events. For 404/404 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4409 event pairs, 64 based on Foata normal form. 98/1094 useless extension candidates. Maximal degree in co-relation 2484. Up to 210 conditions per place. [2024-12-02 06:33:47,786 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 136 selfloop transitions, 12 changer transitions 0/152 dead transitions. [2024-12-02 06:33:47,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 152 transitions, 825 flow [2024-12-02 06:33:47,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 06:33:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 06:33:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-12-02 06:33:47,788 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6262626262626263 [2024-12-02 06:33:47,788 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 171 flow. Second operand 12 states and 248 transitions. [2024-12-02 06:33:47,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 152 transitions, 825 flow [2024-12-02 06:33:47,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 152 transitions, 821 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 06:33:47,793 INFO L231 Difference]: Finished difference. Result has 74 places, 47 transitions, 246 flow [2024-12-02 06:33:47,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=246, PETRI_PLACES=74, PETRI_TRANSITIONS=47} [2024-12-02 06:33:47,794 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 41 predicate places. [2024-12-02 06:33:47,794 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 47 transitions, 246 flow [2024-12-02 06:33:47,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 0 states have call successors, (0), 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 06:33:47,795 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:33:47,795 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:33:47,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 06:33:47,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:33:47,996 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 06:33:47,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:33:47,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1869148358, now seen corresponding path program 1 times [2024-12-02 06:33:47,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:33:47,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931508818] [2024-12-02 06:33:47,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:47,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:33:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:48,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:33:48,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931508818] [2024-12-02 06:33:48,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931508818] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:33:48,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097690806] [2024-12-02 06:33:48,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:33:48,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:33:48,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:33:48,263 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:33:48,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 06:33:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:33:48,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 06:33:48,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:33:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:48,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:33:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:48,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097690806] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:33:48,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:33:48,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-12-02 06:33:48,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826075779] [2024-12-02 06:33:48,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:33:48,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 06:33:48,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:33:48,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 06:33:48,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-12-02 06:33:48,883 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-12-02 06:33:48,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 47 transitions, 246 flow. Second operand has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 0 states have call successors, (0), 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 06:33:48,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:33:48,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-12-02 06:33:48,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:33:49,690 INFO L124 PetriNetUnfolderBase]: 1091/2372 cut-off events. [2024-12-02 06:33:49,690 INFO L125 PetriNetUnfolderBase]: For 2647/2647 co-relation queries the response was YES. [2024-12-02 06:33:49,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6414 conditions, 2372 events. 1091/2372 cut-off events. For 2647/2647 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 12584 event pairs, 160 based on Foata normal form. 231/2570 useless extension candidates. Maximal degree in co-relation 6384. Up to 410 conditions per place. [2024-12-02 06:33:49,707 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 215 selfloop transitions, 12 changer transitions 0/230 dead transitions. [2024-12-02 06:33:49,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 230 transitions, 1742 flow [2024-12-02 06:33:49,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 06:33:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 06:33:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-12-02 06:33:49,709 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.648989898989899 [2024-12-02 06:33:49,709 INFO L175 Difference]: Start difference. First operand has 74 places, 47 transitions, 246 flow. Second operand 12 states and 257 transitions. [2024-12-02 06:33:49,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 230 transitions, 1742 flow [2024-12-02 06:33:49,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 230 transitions, 1561 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-12-02 06:33:49,718 INFO L231 Difference]: Finished difference. Result has 88 places, 53 transitions, 306 flow [2024-12-02 06:33:49,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=306, PETRI_PLACES=88, PETRI_TRANSITIONS=53} [2024-12-02 06:33:49,719 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 55 predicate places. [2024-12-02 06:33:49,719 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 53 transitions, 306 flow [2024-12-02 06:33:49,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 0 states have call successors, (0), 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 06:33:49,720 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:33:49,720 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-12-02 06:33:49,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 06:33:49,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 06:33:49,920 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 06:33:49,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:33:49,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1520166075, now seen corresponding path program 2 times [2024-12-02 06:33:49,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:33:49,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362937403] [2024-12-02 06:33:49,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:33:49,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:33:49,962 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:33:49,962 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:33:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:50,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:33:50,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362937403] [2024-12-02 06:33:50,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362937403] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:33:50,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624865306] [2024-12-02 06:33:50,334 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:33:50,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:33:50,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:33:50,336 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:33:50,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 06:33:50,490 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:33:50,490 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:33:50,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 06:33:50,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:33:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:50,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:33:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:51,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624865306] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:33:51,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:33:51,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-12-02 06:33:51,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37927330] [2024-12-02 06:33:51,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:33:51,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 06:33:51,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:33:51,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 06:33:51,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-12-02 06:33:51,427 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-12-02 06:33:51,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 53 transitions, 306 flow. Second operand has 23 states, 23 states have (on average 14.173913043478262) internal successors, (326), 23 states have internal predecessors, (326), 0 states have call successors, (0), 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 06:33:51,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:33:51,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-12-02 06:33:51,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:33:53,504 INFO L124 PetriNetUnfolderBase]: 2081/4508 cut-off events. [2024-12-02 06:33:53,504 INFO L125 PetriNetUnfolderBase]: For 7927/7927 co-relation queries the response was YES. [2024-12-02 06:33:53,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13073 conditions, 4508 events. 2081/4508 cut-off events. For 7927/7927 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 24632 event pairs, 0 based on Foata normal form. 396/4904 useless extension candidates. Maximal degree in co-relation 13035. Up to 463 conditions per place. [2024-12-02 06:33:53,534 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 406 selfloop transitions, 23 changer transitions 44/476 dead transitions. [2024-12-02 06:33:53,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 476 transitions, 3336 flow [2024-12-02 06:33:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 06:33:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-12-02 06:33:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 517 transitions. [2024-12-02 06:33:53,537 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-12-02 06:33:53,538 INFO L175 Difference]: Start difference. First operand has 88 places, 53 transitions, 306 flow. Second operand 24 states and 517 transitions. [2024-12-02 06:33:53,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 476 transitions, 3336 flow [2024-12-02 06:33:53,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 476 transitions, 3299 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-12-02 06:33:53,556 INFO L231 Difference]: Finished difference. Result has 109 places, 61 transitions, 388 flow [2024-12-02 06:33:53,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=388, PETRI_PLACES=109, PETRI_TRANSITIONS=61} [2024-12-02 06:33:53,557 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 76 predicate places. [2024-12-02 06:33:53,557 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 61 transitions, 388 flow [2024-12-02 06:33:53,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.173913043478262) internal successors, (326), 23 states have internal predecessors, (326), 0 states have call successors, (0), 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 06:33:53,558 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 06:33:53,558 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-12-02 06:33:53,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 06:33:53,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-02 06:33:53,758 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 06:33:53,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:33:53,759 INFO L85 PathProgramCache]: Analyzing trace with hash -288441263, now seen corresponding path program 2 times [2024-12-02 06:33:53,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:33:53,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189968035] [2024-12-02 06:33:53,759 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:33:53,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:33:53,796 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:33:53,796 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:33:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:54,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:33:54,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189968035] [2024-12-02 06:33:54,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189968035] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:33:54,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326634971] [2024-12-02 06:33:54,134 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:33:54,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:33:54,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:33:54,136 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:33:54,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 06:33:54,289 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:33:54,290 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:33:54,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 06:33:54,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:33:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:54,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:33:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-12-02 06:33:55,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326634971] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:33:55,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:33:55,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-12-02 06:33:55,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908608721] [2024-12-02 06:33:55,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:33:55,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 06:33:55,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:33:55,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 06:33:55,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2024-12-02 06:33:55,686 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 33 [2024-12-02 06:33:55,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 61 transitions, 388 flow. Second operand has 23 states, 23 states have (on average 14.173913043478262) internal successors, (326), 23 states have internal predecessors, (326), 0 states have call successors, (0), 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 06:33:55,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 06:33:55,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 33 [2024-12-02 06:33:55,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 06:33:57,320 INFO L124 PetriNetUnfolderBase]: 2333/5064 cut-off events. [2024-12-02 06:33:57,320 INFO L125 PetriNetUnfolderBase]: For 9929/9929 co-relation queries the response was YES. [2024-12-02 06:33:57,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15075 conditions, 5064 events. 2333/5064 cut-off events. For 9929/9929 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 29408 event pairs, 0 based on Foata normal form. 126/5190 useless extension candidates. Maximal degree in co-relation 15034. Up to 630 conditions per place. [2024-12-02 06:33:57,340 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 0 selfloop transitions, 0 changer transitions 417/417 dead transitions. [2024-12-02 06:33:57,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 417 transitions, 3798 flow [2024-12-02 06:33:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 06:33:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-12-02 06:33:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 297 transitions. [2024-12-02 06:33:57,341 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-12-02 06:33:57,342 INFO L175 Difference]: Start difference. First operand has 109 places, 61 transitions, 388 flow. Second operand 15 states and 297 transitions. [2024-12-02 06:33:57,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 417 transitions, 3798 flow [2024-12-02 06:33:57,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 417 transitions, 3217 flow, removed 171 selfloop flow, removed 18 redundant places. [2024-12-02 06:33:57,361 INFO L231 Difference]: Finished difference. Result has 102 places, 0 transitions, 0 flow [2024-12-02 06:33:57,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=102, PETRI_TRANSITIONS=0} [2024-12-02 06:33:57,362 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 69 predicate places. [2024-12-02 06:33:57,362 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 0 transitions, 0 flow [2024-12-02 06:33:57,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.173913043478262) internal successors, (326), 23 states have internal predecessors, (326), 0 states have call successors, (0), 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 06:33:57,364 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (13 of 14 remaining) [2024-12-02 06:33:57,365 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-12-02 06:33:57,365 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-12-02 06:33:57,365 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2024-12-02 06:33:57,365 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2024-12-02 06:33:57,365 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 14 remaining) [2024-12-02 06:33:57,365 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-12-02 06:33:57,365 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2024-12-02 06:33:57,365 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2024-12-02 06:33:57,365 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2024-12-02 06:33:57,365 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2024-12-02 06:33:57,366 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-12-02 06:33:57,366 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2024-12-02 06:33:57,366 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2024-12-02 06:33:57,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 06:33:57,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 06:33:57,567 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1] [2024-12-02 06:33:57,573 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-12-02 06:33:57,573 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-12-02 06:33:57,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:33:57 BasicIcfg [2024-12-02 06:33:57,579 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-12-02 06:33:57,579 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-12-02 06:33:57,579 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-12-02 06:33:57,579 INFO L274 PluginConnector]: Witness Printer initialized [2024-12-02 06:33:57,580 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:33:41" (3/4) ... [2024-12-02 06:33:57,581 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-12-02 06:33:57,584 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2024-12-02 06:33:57,588 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 89 nodes and edges [2024-12-02 06:33:57,589 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2024-12-02 06:33:57,589 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-12-02 06:33:57,589 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-12-02 06:33:57,671 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/witness.graphml [2024-12-02 06:33:57,672 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/witness.yml [2024-12-02 06:33:57,672 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-12-02 06:33:57,673 INFO L158 Benchmark]: Toolchain (without parser) took 17529.39ms. Allocated memory was 142.6MB in the beginning and 377.5MB in the end (delta: 234.9MB). Free memory was 116.5MB in the beginning and 190.9MB in the end (delta: -74.4MB). Peak memory consumption was 157.7MB. Max. memory is 16.1GB. [2024-12-02 06:33:57,673 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 142.6MB. Free memory is still 83.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 06:33:57,674 INFO L158 Benchmark]: CACSL2BoogieTranslator took 651.67ms. Allocated memory is still 142.6MB. Free memory was 116.3MB in the beginning and 86.8MB in the end (delta: 29.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-12-02 06:33:57,674 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.83ms. Allocated memory is still 142.6MB. Free memory was 86.8MB in the beginning and 84.5MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 06:33:57,674 INFO L158 Benchmark]: Boogie Preprocessor took 51.44ms. Allocated memory is still 142.6MB. Free memory was 84.5MB in the beginning and 82.3MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 06:33:57,674 INFO L158 Benchmark]: RCFGBuilder took 887.74ms. Allocated memory is still 142.6MB. Free memory was 82.2MB in the beginning and 67.8MB in the end (delta: 14.4MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. [2024-12-02 06:33:57,675 INFO L158 Benchmark]: TraceAbstraction took 15793.88ms. Allocated memory was 142.6MB in the beginning and 377.5MB in the end (delta: 234.9MB). Free memory was 67.2MB in the beginning and 197.4MB in the end (delta: -130.3MB). Peak memory consumption was 185.2MB. Max. memory is 16.1GB. [2024-12-02 06:33:57,675 INFO L158 Benchmark]: Witness Printer took 92.86ms. Allocated memory is still 377.5MB. Free memory was 197.4MB in the beginning and 190.9MB in the end (delta: 6.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 06:33:57,677 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 142.6MB. Free memory is still 83.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 651.67ms. Allocated memory is still 142.6MB. Free memory was 116.3MB in the beginning and 86.8MB in the end (delta: 29.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.83ms. Allocated memory is still 142.6MB. Free memory was 86.8MB in the beginning and 84.5MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 51.44ms. Allocated memory is still 142.6MB. Free memory was 84.5MB in the beginning and 82.3MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 887.74ms. Allocated memory is still 142.6MB. Free memory was 82.2MB in the beginning and 67.8MB in the end (delta: 14.4MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. * TraceAbstraction took 15793.88ms. Allocated memory was 142.6MB in the beginning and 377.5MB in the end (delta: 234.9MB). Free memory was 67.2MB in the beginning and 197.4MB in the end (delta: -130.3MB). Peak memory consumption was 185.2MB. Max. memory is 16.1GB. * Witness Printer took 92.86ms. Allocated memory is still 377.5MB. Free memory was 197.4MB in the beginning and 190.9MB in the end (delta: 6.6MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 932]: all allocated memory was freed For all program executions holds that all allocated memory was freed 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: -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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 45 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: 15.7s, OverallIterations: 12, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2245 SdHoareTripleChecker+Valid, 3.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2153 mSDsluCounter, 437 SdHoareTripleChecker+Invalid, 2.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 418 mSDsCounter, 41 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4567 IncrementalHoareTripleChecker+Invalid, 4608 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 41 mSolverCounterUnsat, 19 mSDtfsCounter, 4567 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 416 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=388occurred in iteration=11, InterpolantAutomatonStates: 105, 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, 0.5s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 412 NumberOfCodeBlocks, 398 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 6925 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1947 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 25 InterpolantComputations, 6 PerfectInterpolantSequences, 945/1242 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 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-12-02 06:33:57,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a1feb3-27fe-456a-8d88-814b77ff33dc/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE