./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU --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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:10:47,526 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:10:47,626 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:10:47,633 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:10:47,636 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:10:47,680 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:10:47,682 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:10:47,683 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:10:47,684 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:10:47,684 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:10:47,685 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:10:47,686 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:10:47,687 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:10:47,687 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:10:47,687 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:10:47,688 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:10:47,691 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:10:47,692 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:10:47,692 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:10:47,693 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:10:47,693 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:10:47,693 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:10:47,694 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:10:47,694 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:10:47,694 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:10:47,694 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:10:47,695 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:10:47,695 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:10:47,695 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:10:47,695 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:10:47,700 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:10:47,700 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:10:47,700 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:10:47,701 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:10:47,701 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:10:47,701 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:10:47,702 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:10:47,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:10:47,703 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:10:47,704 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:10:47,704 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:10:47,705 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:10:47,705 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2024-10-31 22:10:48,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:10:48,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:10:48,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:10:48,111 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:10:48,112 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:10:48,113 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/pthread/stack-2.i Unable to find full path for "g++" [2024-10-31 22:10:50,400 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:10:50,760 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:10:50,761 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/sv-benchmarks/c/pthread/stack-2.i [2024-10-31 22:10:50,788 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/data/18bd172cd/3babb619464048f7bc1cb80840d13b31/FLAG68ef8ddc1 [2024-10-31 22:10:50,816 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/data/18bd172cd/3babb619464048f7bc1cb80840d13b31 [2024-10-31 22:10:50,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:10:50,821 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:10:50,823 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:10:50,823 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:10:50,830 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:10:50,831 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:10:50" (1/1) ... [2024-10-31 22:10:50,833 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cca7e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:50, skipping insertion in model container [2024-10-31 22:10:50,833 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:10:50" (1/1) ... [2024-10-31 22:10:50,907 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:10:51,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:10:51,632 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:10:51,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:10:51,830 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:10:51,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51 WrapperNode [2024-10-31 22:10:51,831 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:10:51,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:10:51,833 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:10:51,834 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:10:51,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (1/1) ... [2024-10-31 22:10:51,875 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (1/1) ... [2024-10-31 22:10:51,924 INFO L138 Inliner]: procedures = 277, calls = 37, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 161 [2024-10-31 22:10:51,925 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:10:51,926 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:10:51,926 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:10:51,926 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:10:51,942 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (1/1) ... [2024-10-31 22:10:51,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (1/1) ... [2024-10-31 22:10:51,951 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (1/1) ... [2024-10-31 22:10:51,982 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 1 writes are split as follows [0, 0, 1]. [2024-10-31 22:10:51,983 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (1/1) ... [2024-10-31 22:10:51,983 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (1/1) ... [2024-10-31 22:10:51,992 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (1/1) ... [2024-10-31 22:10:51,996 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (1/1) ... [2024-10-31 22:10:51,998 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (1/1) ... [2024-10-31 22:10:52,000 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (1/1) ... [2024-10-31 22:10:52,004 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:10:52,005 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:10:52,006 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:10:52,006 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:10:52,007 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (1/1) ... [2024-10-31 22:10:52,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:10:52,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:52,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:10:52,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:10:52,116 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-31 22:10:52,116 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-31 22:10:52,116 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-31 22:10:52,117 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-31 22:10:52,117 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-31 22:10:52,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:10:52,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:10:52,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:10:52,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:10:52,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:10:52,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:10:52,120 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-31 22:10:52,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:10:52,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:10:52,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:10:52,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:10:52,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:10:52,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:10:52,124 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:10:52,306 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:10:52,309 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:10:52,758 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:10:52,764 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:10:53,181 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:10:53,181 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:10:53,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:10:53 BoogieIcfgContainer [2024-10-31 22:10:53,182 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:10:53,185 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:10:53,185 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:10:53,191 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:10:53,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:10:50" (1/3) ... [2024-10-31 22:10:53,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd44ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:10:53, skipping insertion in model container [2024-10-31 22:10:53,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:51" (2/3) ... [2024-10-31 22:10:53,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd44ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:10:53, skipping insertion in model container [2024-10-31 22:10:53,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:10:53" (3/3) ... [2024-10-31 22:10:53,197 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2024-10-31 22:10:53,220 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:10:53,220 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-10-31 22:10:53,220 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:10:53,312 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:10:53,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 55 transitions, 124 flow [2024-10-31 22:10:53,405 INFO L124 PetriNetUnfolderBase]: 9/53 cut-off events. [2024-10-31 22:10:53,406 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:10:53,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 53 events. 9/53 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 135 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 48. Up to 3 conditions per place. [2024-10-31 22:10:53,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 55 transitions, 124 flow [2024-10-31 22:10:53,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 52 transitions, 116 flow [2024-10-31 22:10:53,436 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:10:53,447 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;@579d1ff7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:10:53,448 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-31 22:10:53,462 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:10:53,462 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2024-10-31 22:10:53,462 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:10:53,463 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:53,463 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:53,464 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:10:53,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:53,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1884156541, now seen corresponding path program 1 times [2024-10-31 22:10:53,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:53,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446659663] [2024-10-31 22:10:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:53,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:54,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:54,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446659663] [2024-10-31 22:10:54,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446659663] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:54,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:54,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:10:54,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299637867] [2024-10-31 22:10:54,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:54,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:10:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:54,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:10:54,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:10:54,152 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-31 22:10:54,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:54,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:54,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-31 22:10:54,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:54,542 INFO L124 PetriNetUnfolderBase]: 454/883 cut-off events. [2024-10-31 22:10:54,543 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-10-31 22:10:54,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 883 events. 454/883 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4507 event pairs, 242 based on Foata normal form. 90/851 useless extension candidates. Maximal degree in co-relation 1570. Up to 512 conditions per place. [2024-10-31 22:10:54,556 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 43 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2024-10-31 22:10:54,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 227 flow [2024-10-31 22:10:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:10:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:10:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-10-31 22:10:54,573 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2024-10-31 22:10:54,576 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 116 flow. Second operand 4 states and 117 transitions. [2024-10-31 22:10:54,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 227 flow [2024-10-31 22:10:54,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 217 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:10:54,586 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 100 flow [2024-10-31 22:10:54,588 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-10-31 22:10:54,596 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-10-31 22:10:54,596 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 100 flow [2024-10-31 22:10:54,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:54,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:54,598 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:54,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:10:54,598 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:10:54,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:54,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1884156542, now seen corresponding path program 1 times [2024-10-31 22:10:54,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:54,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014339552] [2024-10-31 22:10:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:54,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:54,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:54,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014339552] [2024-10-31 22:10:54,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014339552] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:54,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:54,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:10:54,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874227984] [2024-10-31 22:10:54,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:54,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:10:54,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:54,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:10:54,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:10:55,031 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-31 22:10:55,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:55,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:55,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-31 22:10:55,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:55,640 INFO L124 PetriNetUnfolderBase]: 750/1388 cut-off events. [2024-10-31 22:10:55,641 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-10-31 22:10:55,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 1388 events. 750/1388 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7411 event pairs, 125 based on Foata normal form. 0/1220 useless extension candidates. Maximal degree in co-relation 807. Up to 848 conditions per place. [2024-10-31 22:10:55,657 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 87 selfloop transitions, 8 changer transitions 0/108 dead transitions. [2024-10-31 22:10:55,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 108 transitions, 423 flow [2024-10-31 22:10:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:10:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:10:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-10-31 22:10:55,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5878787878787879 [2024-10-31 22:10:55,664 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 100 flow. Second operand 6 states and 194 transitions. [2024-10-31 22:10:55,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 108 transitions, 423 flow [2024-10-31 22:10:55,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 108 transitions, 415 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:10:55,668 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 153 flow [2024-10-31 22:10:55,669 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=153, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2024-10-31 22:10:55,670 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-10-31 22:10:55,670 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 153 flow [2024-10-31 22:10:55,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:55,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:55,672 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:55,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:10:55,673 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:10:55,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:55,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1982671279, now seen corresponding path program 1 times [2024-10-31 22:10:55,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:55,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009542007] [2024-10-31 22:10:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:55,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:55,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:55,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009542007] [2024-10-31 22:10:55,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009542007] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:55,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:55,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:10:55,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877358352] [2024-10-31 22:10:55,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:55,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:10:55,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:10:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:10:55,790 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 55 [2024-10-31 22:10:55,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:55,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:55,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 55 [2024-10-31 22:10:55,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:56,162 INFO L124 PetriNetUnfolderBase]: 663/1274 cut-off events. [2024-10-31 22:10:56,162 INFO L125 PetriNetUnfolderBase]: For 155/155 co-relation queries the response was YES. [2024-10-31 22:10:56,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 1274 events. 663/1274 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6567 event pairs, 176 based on Foata normal form. 34/1197 useless extension candidates. Maximal degree in co-relation 2591. Up to 721 conditions per place. [2024-10-31 22:10:56,173 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 67 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2024-10-31 22:10:56,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 376 flow [2024-10-31 22:10:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:10:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:10:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-10-31 22:10:56,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-10-31 22:10:56,176 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 153 flow. Second operand 5 states and 160 transitions. [2024-10-31 22:10:56,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 376 flow [2024-10-31 22:10:56,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 374 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:10:56,184 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 161 flow [2024-10-31 22:10:56,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-10-31 22:10:56,187 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2024-10-31 22:10:56,187 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 161 flow [2024-10-31 22:10:56,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:56,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:56,188 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:56,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:10:56,188 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:10:56,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:56,190 INFO L85 PathProgramCache]: Analyzing trace with hash -606823708, now seen corresponding path program 1 times [2024-10-31 22:10:56,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:56,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522437170] [2024-10-31 22:10:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:56,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:56,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:56,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522437170] [2024-10-31 22:10:56,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522437170] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:56,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:56,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:10:56,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959821313] [2024-10-31 22:10:56,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:56,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:10:56,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:56,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:10:56,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:10:56,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 55 [2024-10-31 22:10:56,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:56,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:56,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 55 [2024-10-31 22:10:56,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:56,713 INFO L124 PetriNetUnfolderBase]: 971/1835 cut-off events. [2024-10-31 22:10:56,714 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2024-10-31 22:10:56,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4026 conditions, 1835 events. 971/1835 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 9714 event pairs, 464 based on Foata normal form. 0/1713 useless extension candidates. Maximal degree in co-relation 3355. Up to 1051 conditions per place. [2024-10-31 22:10:56,731 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 73 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2024-10-31 22:10:56,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 93 transitions, 429 flow [2024-10-31 22:10:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:10:56,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:10:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-10-31 22:10:56,737 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6318181818181818 [2024-10-31 22:10:56,737 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 161 flow. Second operand 4 states and 139 transitions. [2024-10-31 22:10:56,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 93 transitions, 429 flow [2024-10-31 22:10:56,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 93 transitions, 429 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:10:56,744 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 197 flow [2024-10-31 22:10:56,745 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-10-31 22:10:56,746 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 11 predicate places. [2024-10-31 22:10:56,746 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 197 flow [2024-10-31 22:10:56,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:56,747 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:56,747 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:56,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:10:56,748 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:10:56,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:56,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2114840908, now seen corresponding path program 1 times [2024-10-31 22:10:56,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:56,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921874200] [2024-10-31 22:10:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:56,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:56,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:56,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921874200] [2024-10-31 22:10:56,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921874200] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:56,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:56,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:10:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907245684] [2024-10-31 22:10:56,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:56,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:10:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:56,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:10:56,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:10:56,805 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 55 [2024-10-31 22:10:56,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:56,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:56,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 55 [2024-10-31 22:10:56,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:57,292 INFO L124 PetriNetUnfolderBase]: 1096/2029 cut-off events. [2024-10-31 22:10:57,292 INFO L125 PetriNetUnfolderBase]: For 579/579 co-relation queries the response was YES. [2024-10-31 22:10:57,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4873 conditions, 2029 events. 1096/2029 cut-off events. For 579/579 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10942 event pairs, 514 based on Foata normal form. 22/1932 useless extension candidates. Maximal degree in co-relation 4011. Up to 1284 conditions per place. [2024-10-31 22:10:57,311 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 62 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-10-31 22:10:57,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 397 flow [2024-10-31 22:10:57,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:10:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:10:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-10-31 22:10:57,313 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6424242424242425 [2024-10-31 22:10:57,313 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 197 flow. Second operand 3 states and 106 transitions. [2024-10-31 22:10:57,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 397 flow [2024-10-31 22:10:57,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 391 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:10:57,321 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 203 flow [2024-10-31 22:10:57,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-10-31 22:10:57,323 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-10-31 22:10:57,324 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 203 flow [2024-10-31 22:10:57,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:57,325 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:57,325 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:57,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:10:57,328 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:10:57,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:57,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1369334572, now seen corresponding path program 1 times [2024-10-31 22:10:57,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:57,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724172995] [2024-10-31 22:10:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:57,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:57,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:57,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724172995] [2024-10-31 22:10:57,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724172995] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:57,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:57,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:10:57,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178544139] [2024-10-31 22:10:57,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:57,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:10:57,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:57,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:10:57,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:10:57,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-31 22:10:57,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2024-10-31 22:10:57,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:57,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-31 22:10:57,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:57,812 INFO L124 PetriNetUnfolderBase]: 1006/1856 cut-off events. [2024-10-31 22:10:57,812 INFO L125 PetriNetUnfolderBase]: For 474/474 co-relation queries the response was YES. [2024-10-31 22:10:57,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4370 conditions, 1856 events. 1006/1856 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 9917 event pairs, 361 based on Foata normal form. 14/1750 useless extension candidates. Maximal degree in co-relation 3871. Up to 1410 conditions per place. [2024-10-31 22:10:57,828 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 49 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-10-31 22:10:57,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 313 flow [2024-10-31 22:10:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:10:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:10:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-10-31 22:10:57,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-10-31 22:10:57,830 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 203 flow. Second operand 3 states and 96 transitions. [2024-10-31 22:10:57,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 313 flow [2024-10-31 22:10:57,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 303 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-31 22:10:57,836 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 180 flow [2024-10-31 22:10:57,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-10-31 22:10:57,837 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-10-31 22:10:57,837 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 180 flow [2024-10-31 22:10:57,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2024-10-31 22:10:57,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:57,838 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:57,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:10:57,839 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:10:57,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:57,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1602994892, now seen corresponding path program 1 times [2024-10-31 22:10:57,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:57,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156779508] [2024-10-31 22:10:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:57,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:58,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:58,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156779508] [2024-10-31 22:10:58,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156779508] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:10:58,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271166467] [2024-10-31 22:10:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:58,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:58,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:58,386 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:10:58,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:10:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:58,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-31 22:10:58,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:10:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:58,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:10:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:59,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271166467] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:10:59,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:10:59,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-10-31 22:10:59,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387551282] [2024-10-31 22:10:59,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:10:59,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:10:59,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:59,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:10:59,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:10:59,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-31 22:10:59,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 180 flow. Second operand has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:59,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:59,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-31 22:10:59,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:02,247 INFO L124 PetriNetUnfolderBase]: 4128/7722 cut-off events. [2024-10-31 22:11:02,247 INFO L125 PetriNetUnfolderBase]: For 2485/2485 co-relation queries the response was YES. [2024-10-31 22:11:02,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17864 conditions, 7722 events. 4128/7722 cut-off events. For 2485/2485 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 50434 event pairs, 309 based on Foata normal form. 192/7404 useless extension candidates. Maximal degree in co-relation 7413. Up to 1423 conditions per place. [2024-10-31 22:11:02,308 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 327 selfloop transitions, 45 changer transitions 0/386 dead transitions. [2024-10-31 22:11:02,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 386 transitions, 1892 flow [2024-10-31 22:11:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-31 22:11:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-31 22:11:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 685 transitions. [2024-10-31 22:11:02,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-10-31 22:11:02,312 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 180 flow. Second operand 20 states and 685 transitions. [2024-10-31 22:11:02,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 386 transitions, 1892 flow [2024-10-31 22:11:02,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 386 transitions, 1850 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-10-31 22:11:02,329 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 592 flow [2024-10-31 22:11:02,329 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=592, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2024-10-31 22:11:02,330 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2024-10-31 22:11:02,330 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 592 flow [2024-10-31 22:11:02,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:02,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:02,330 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:02,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:11:02,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-31 22:11:02,537 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:11:02,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:02,538 INFO L85 PathProgramCache]: Analyzing trace with hash -268637720, now seen corresponding path program 1 times [2024-10-31 22:11:02,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:02,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273761313] [2024-10-31 22:11:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:02,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:02,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:02,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273761313] [2024-10-31 22:11:02,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273761313] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:02,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:02,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:02,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731388003] [2024-10-31 22:11:02,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:02,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:02,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:02,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:02,648 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 55 [2024-10-31 22:11:02,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 592 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:02,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:02,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 55 [2024-10-31 22:11:02,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:03,398 INFO L124 PetriNetUnfolderBase]: 1833/3828 cut-off events. [2024-10-31 22:11:03,398 INFO L125 PetriNetUnfolderBase]: For 2279/2279 co-relation queries the response was YES. [2024-10-31 22:11:03,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9379 conditions, 3828 events. 1833/3828 cut-off events. For 2279/2279 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 22305 event pairs, 372 based on Foata normal form. 234/3906 useless extension candidates. Maximal degree in co-relation 9177. Up to 2311 conditions per place. [2024-10-31 22:11:03,433 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 70 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2024-10-31 22:11:03,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 609 flow [2024-10-31 22:11:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-10-31 22:11:03,435 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5696969696969697 [2024-10-31 22:11:03,435 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 592 flow. Second operand 3 states and 94 transitions. [2024-10-31 22:11:03,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 609 flow [2024-10-31 22:11:03,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 89 transitions, 561 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-10-31 22:11:03,459 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 389 flow [2024-10-31 22:11:03,459 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=389, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2024-10-31 22:11:03,463 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2024-10-31 22:11:03,463 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 389 flow [2024-10-31 22:11:03,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:03,464 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:03,464 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:03,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:11:03,465 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:11:03,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:03,465 INFO L85 PathProgramCache]: Analyzing trace with hash 700879737, now seen corresponding path program 1 times [2024-10-31 22:11:03,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:03,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390898093] [2024-10-31 22:11:03,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:03,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:03,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:03,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390898093] [2024-10-31 22:11:03,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390898093] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:03,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:03,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:03,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024388108] [2024-10-31 22:11:03,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:03,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:03,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:03,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:03,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-31 22:11:03,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 389 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:03,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:03,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-31 22:11:03,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:04,203 INFO L124 PetriNetUnfolderBase]: 1838/3730 cut-off events. [2024-10-31 22:11:04,204 INFO L125 PetriNetUnfolderBase]: For 1489/1489 co-relation queries the response was YES. [2024-10-31 22:11:04,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9363 conditions, 3730 events. 1838/3730 cut-off events. For 1489/1489 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 21405 event pairs, 1214 based on Foata normal form. 0/3605 useless extension candidates. Maximal degree in co-relation 7894. Up to 2670 conditions per place. [2024-10-31 22:11:04,294 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 65 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2024-10-31 22:11:04,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 82 transitions, 540 flow [2024-10-31 22:11:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:11:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-10-31 22:11:04,296 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-10-31 22:11:04,297 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 389 flow. Second operand 4 states and 100 transitions. [2024-10-31 22:11:04,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 82 transitions, 540 flow [2024-10-31 22:11:04,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 536 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:04,309 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 389 flow [2024-10-31 22:11:04,310 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2024-10-31 22:11:04,311 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2024-10-31 22:11:04,312 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 389 flow [2024-10-31 22:11:04,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:04,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:04,312 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:04,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:11:04,313 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:11:04,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:04,317 INFO L85 PathProgramCache]: Analyzing trace with hash 289520536, now seen corresponding path program 1 times [2024-10-31 22:11:04,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:04,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691461934] [2024-10-31 22:11:04,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:04,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:04,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:04,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691461934] [2024-10-31 22:11:04,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691461934] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:04,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:04,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:11:04,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659762954] [2024-10-31 22:11:04,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:04,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:11:04,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:04,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:11:04,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:11:04,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-31 22:11:04,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 389 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:04,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:04,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-31 22:11:04,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:05,987 INFO L124 PetriNetUnfolderBase]: 1961/3997 cut-off events. [2024-10-31 22:11:05,987 INFO L125 PetriNetUnfolderBase]: For 1679/1679 co-relation queries the response was YES. [2024-10-31 22:11:06,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9865 conditions, 3997 events. 1961/3997 cut-off events. For 1679/1679 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 23178 event pairs, 461 based on Foata normal form. 0/3837 useless extension candidates. Maximal degree in co-relation 8395. Up to 2936 conditions per place. [2024-10-31 22:11:06,019 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 110 selfloop transitions, 9 changer transitions 0/132 dead transitions. [2024-10-31 22:11:06,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 132 transitions, 797 flow [2024-10-31 22:11:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:11:06,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:11:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-10-31 22:11:06,021 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49772727272727274 [2024-10-31 22:11:06,021 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 389 flow. Second operand 8 states and 219 transitions. [2024-10-31 22:11:06,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 132 transitions, 797 flow [2024-10-31 22:11:06,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 132 transitions, 787 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:11:06,034 INFO L231 Difference]: Finished difference. Result has 91 places, 82 transitions, 442 flow [2024-10-31 22:11:06,035 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=442, PETRI_PLACES=91, PETRI_TRANSITIONS=82} [2024-10-31 22:11:06,036 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2024-10-31 22:11:06,036 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 82 transitions, 442 flow [2024-10-31 22:11:06,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:06,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:06,037 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:06,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:11:06,037 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:11:06,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:06,038 INFO L85 PathProgramCache]: Analyzing trace with hash -798695038, now seen corresponding path program 1 times [2024-10-31 22:11:06,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:06,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126074671] [2024-10-31 22:11:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:06,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:06,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:06,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126074671] [2024-10-31 22:11:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126074671] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:06,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:06,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:06,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673221857] [2024-10-31 22:11:06,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:06,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:06,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:06,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:06,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:06,114 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 55 [2024-10-31 22:11:06,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 82 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:06,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:06,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 55 [2024-10-31 22:11:06,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:07,057 INFO L124 PetriNetUnfolderBase]: 2879/6069 cut-off events. [2024-10-31 22:11:07,057 INFO L125 PetriNetUnfolderBase]: For 3090/3090 co-relation queries the response was YES. [2024-10-31 22:11:07,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15027 conditions, 6069 events. 2879/6069 cut-off events. For 3090/3090 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 40506 event pairs, 1373 based on Foata normal form. 137/5984 useless extension candidates. Maximal degree in co-relation 13000. Up to 3403 conditions per place. [2024-10-31 22:11:07,119 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 124 selfloop transitions, 2 changer transitions 0/140 dead transitions. [2024-10-31 22:11:07,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 140 transitions, 1054 flow [2024-10-31 22:11:07,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-10-31 22:11:07,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6484848484848484 [2024-10-31 22:11:07,121 INFO L175 Difference]: Start difference. First operand has 91 places, 82 transitions, 442 flow. Second operand 3 states and 107 transitions. [2024-10-31 22:11:07,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 140 transitions, 1054 flow [2024-10-31 22:11:07,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 140 transitions, 1038 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:11:07,145 INFO L231 Difference]: Finished difference. Result has 90 places, 83 transitions, 445 flow [2024-10-31 22:11:07,146 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=445, PETRI_PLACES=90, PETRI_TRANSITIONS=83} [2024-10-31 22:11:07,146 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 40 predicate places. [2024-10-31 22:11:07,146 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 83 transitions, 445 flow [2024-10-31 22:11:07,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:07,147 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:07,147 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:07,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:11:07,148 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:11:07,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:07,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1104727326, now seen corresponding path program 1 times [2024-10-31 22:11:07,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:07,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055904962] [2024-10-31 22:11:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:07,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:07,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:07,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055904962] [2024-10-31 22:11:07,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055904962] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:07,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:07,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:11:07,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832234638] [2024-10-31 22:11:07,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:07,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:07,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:07,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:07,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:07,264 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 55 [2024-10-31 22:11:07,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 83 transitions, 445 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:07,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:07,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 55 [2024-10-31 22:11:07,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:08,414 INFO L124 PetriNetUnfolderBase]: 3194/6487 cut-off events. [2024-10-31 22:11:08,415 INFO L125 PetriNetUnfolderBase]: For 4314/4314 co-relation queries the response was YES. [2024-10-31 22:11:08,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17920 conditions, 6487 events. 3194/6487 cut-off events. For 4314/4314 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 42398 event pairs, 475 based on Foata normal form. 105/6410 useless extension candidates. Maximal degree in co-relation 14840. Up to 2632 conditions per place. [2024-10-31 22:11:08,481 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 109 selfloop transitions, 10 changer transitions 0/133 dead transitions. [2024-10-31 22:11:08,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 133 transitions, 930 flow [2024-10-31 22:11:08,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:11:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-10-31 22:11:08,483 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5527272727272727 [2024-10-31 22:11:08,483 INFO L175 Difference]: Start difference. First operand has 90 places, 83 transitions, 445 flow. Second operand 5 states and 152 transitions. [2024-10-31 22:11:08,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 133 transitions, 930 flow [2024-10-31 22:11:08,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 133 transitions, 923 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:08,521 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 519 flow [2024-10-31 22:11:08,521 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=519, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2024-10-31 22:11:08,522 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 46 predicate places. [2024-10-31 22:11:08,523 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 519 flow [2024-10-31 22:11:08,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:08,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:08,525 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:08,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:11:08,525 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:11:08,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:08,526 INFO L85 PathProgramCache]: Analyzing trace with hash 428939891, now seen corresponding path program 1 times [2024-10-31 22:11:08,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:08,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630840347] [2024-10-31 22:11:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:08,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:09,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:09,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630840347] [2024-10-31 22:11:09,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630840347] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:09,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:09,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-31 22:11:09,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331337442] [2024-10-31 22:11:09,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:09,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:11:09,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:09,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:11:09,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:11:09,642 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 55 [2024-10-31 22:11:09,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 519 flow. Second operand has 10 states, 10 states have (on average 18.9) internal successors, (189), 10 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:09,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:09,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 55 [2024-10-31 22:11:09,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:11,828 INFO L124 PetriNetUnfolderBase]: 4726/9654 cut-off events. [2024-10-31 22:11:11,829 INFO L125 PetriNetUnfolderBase]: For 8698/8698 co-relation queries the response was YES. [2024-10-31 22:11:11,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26991 conditions, 9654 events. 4726/9654 cut-off events. For 8698/8698 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 67172 event pairs, 1022 based on Foata normal form. 24/9464 useless extension candidates. Maximal degree in co-relation 21486. Up to 4678 conditions per place. [2024-10-31 22:11:12,035 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 187 selfloop transitions, 25 changer transitions 0/226 dead transitions. [2024-10-31 22:11:12,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 226 transitions, 1602 flow [2024-10-31 22:11:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:11:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-31 22:11:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 339 transitions. [2024-10-31 22:11:12,044 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2024-10-31 22:11:12,044 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 519 flow. Second operand 12 states and 339 transitions. [2024-10-31 22:11:12,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 226 transitions, 1602 flow [2024-10-31 22:11:12,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 226 transitions, 1600 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:12,181 INFO L231 Difference]: Finished difference. Result has 112 places, 105 transitions, 735 flow [2024-10-31 22:11:12,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=735, PETRI_PLACES=112, PETRI_TRANSITIONS=105} [2024-10-31 22:11:12,182 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 62 predicate places. [2024-10-31 22:11:12,182 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 105 transitions, 735 flow [2024-10-31 22:11:12,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.9) internal successors, (189), 10 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:12,182 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:12,183 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:12,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:11:12,183 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:11:12,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:12,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2104434424, now seen corresponding path program 1 times [2024-10-31 22:11:12,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:12,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50879704] [2024-10-31 22:11:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:12,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:12,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:12,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50879704] [2024-10-31 22:11:12,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50879704] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:12,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636638887] [2024-10-31 22:11:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:12,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:12,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:12,247 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:12,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:11:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:12,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 22:11:12,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:11:12,404 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:11:12,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636638887] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:12,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:11:12,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-10-31 22:11:12,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037299421] [2024-10-31 22:11:12,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:12,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:12,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:12,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:12,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:12,413 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-31 22:11:12,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 105 transitions, 735 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:12,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:12,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-31 22:11:12,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:13,911 INFO L124 PetriNetUnfolderBase]: 4723/9548 cut-off events. [2024-10-31 22:11:13,912 INFO L125 PetriNetUnfolderBase]: For 11717/11717 co-relation queries the response was YES. [2024-10-31 22:11:13,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28284 conditions, 9548 events. 4723/9548 cut-off events. For 11717/11717 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 67235 event pairs, 3763 based on Foata normal form. 31/9347 useless extension candidates. Maximal degree in co-relation 22595. Up to 8111 conditions per place. [2024-10-31 22:11:13,987 INFO L140 encePairwiseOnDemand]: 53/55 looper letters, 89 selfloop transitions, 1 changer transitions 2/104 dead transitions. [2024-10-31 22:11:13,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 104 transitions, 915 flow [2024-10-31 22:11:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-10-31 22:11:13,989 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-10-31 22:11:13,989 INFO L175 Difference]: Start difference. First operand has 112 places, 105 transitions, 735 flow. Second operand 3 states and 80 transitions. [2024-10-31 22:11:13,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 104 transitions, 915 flow [2024-10-31 22:11:14,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 104 transitions, 895 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-10-31 22:11:14,053 INFO L231 Difference]: Finished difference. Result has 109 places, 102 transitions, 710 flow [2024-10-31 22:11:14,053 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=109, PETRI_TRANSITIONS=102} [2024-10-31 22:11:14,054 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 59 predicate places. [2024-10-31 22:11:14,054 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 102 transitions, 710 flow [2024-10-31 22:11:14,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:14,054 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:14,055 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:14,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:11:14,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 22:11:14,256 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-31 22:11:14,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:14,257 INFO L85 PathProgramCache]: Analyzing trace with hash -544958678, now seen corresponding path program 1 times [2024-10-31 22:11:14,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:14,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010704805] [2024-10-31 22:11:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:14,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:14,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:14,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010704805] [2024-10-31 22:11:14,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010704805] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:14,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955485701] [2024-10-31 22:11:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:14,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:14,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:14,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:14,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b347954-a918-47fd-8a84-add094c99c8f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:11:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:14,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 22:11:14,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:15,381 INFO L311 TraceCheckSpWp]: Computing backward predicates...