./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longer.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_ae409930-640d-49a5-a946-fb1394ead2d2/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae409930-640d-49a5-a946-fb1394ead2d2/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_ae409930-640d-49a5-a946-fb1394ead2d2/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae409930-640d-49a5-a946-fb1394ead2d2/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae409930-640d-49a5-a946-fb1394ead2d2/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_ae409930-640d-49a5-a946-fb1394ead2d2/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 f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:56:30,408 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:56:30,502 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae409930-640d-49a5-a946-fb1394ead2d2/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 21:56:30,509 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:56:30,510 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:56:30,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:56:30,547 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:56:30,547 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:56:30,548 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:56:30,549 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:56:30,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:56:30,550 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:56:30,551 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:56:30,552 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:56:30,554 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:56:30,555 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:56:30,555 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:56:30,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:56:30,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:56:30,556 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:56:30,557 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 21:56:30,558 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 21:56:30,558 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 21:56:30,558 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:56:30,559 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 21:56:30,559 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:56:30,560 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 21:56:30,560 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:56:30,560 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:56:30,561 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:56:30,561 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:56:30,562 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:56:30,562 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:56:30,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:30,563 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:56:30,563 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:56:30,564 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:56:30,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:56:30,565 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:56:30,565 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:56:30,565 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:56:30,566 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:56:30,566 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_ae409930-640d-49a5-a946-fb1394ead2d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae409930-640d-49a5-a946-fb1394ead2d2/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2024-10-31 21:56:30,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:56:30,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:56:30,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:56:30,914 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:56:30,915 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:56:30,916 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae409930-640d-49a5-a946-fb1394ead2d2/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/pthread/queue_ok_longer.i Unable to find full path for "g++" [2024-10-31 21:56:33,230 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:56:33,552 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:56:33,553 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae409930-640d-49a5-a946-fb1394ead2d2/sv-benchmarks/c/pthread/queue_ok_longer.i [2024-10-31 21:56:33,572 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae409930-640d-49a5-a946-fb1394ead2d2/bin/uautomizer-verify-4GaUIPS5ZU/data/9b8f5be97/aff2cd8bec3247969d9804ca6c9b62ee/FLAG493f42822 [2024-10-31 21:56:33,598 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae409930-640d-49a5-a946-fb1394ead2d2/bin/uautomizer-verify-4GaUIPS5ZU/data/9b8f5be97/aff2cd8bec3247969d9804ca6c9b62ee [2024-10-31 21:56:33,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:56:33,602 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:56:33,605 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:56:33,605 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:56:33,612 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:56:33,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:56:33" (1/1) ... [2024-10-31 21:56:33,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8134623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:33, skipping insertion in model container [2024-10-31 21:56:33,614 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:56:33" (1/1) ... [2024-10-31 21:56:33,687 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:56:34,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:56:34,623 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:56:34,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:56:34,958 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:56:34,959 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34 WrapperNode [2024-10-31 21:56:34,959 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:56:34,961 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:56:34,961 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:56:34,962 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:56:34,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (1/1) ... [2024-10-31 21:56:35,021 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (1/1) ... [2024-10-31 21:56:35,121 INFO L138 Inliner]: procedures = 274, calls = 854, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 1001 [2024-10-31 21:56:35,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:56:35,123 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:56:35,123 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:56:35,124 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:56:35,136 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (1/1) ... [2024-10-31 21:56:35,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (1/1) ... [2024-10-31 21:56:35,160 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (1/1) ... [2024-10-31 21:56:35,216 INFO L175 MemorySlicer]: Split 835 memory accesses to 4 slices as follows [2, 5, 402, 426]. 51 percent of accesses are in the largest equivalence class. The 810 initializations are split as follows [2, 5, 400, 403]. The 11 writes are split as follows [0, 0, 1, 10]. [2024-10-31 21:56:35,216 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (1/1) ... [2024-10-31 21:56:35,216 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (1/1) ... [2024-10-31 21:56:35,254 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (1/1) ... [2024-10-31 21:56:35,263 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (1/1) ... [2024-10-31 21:56:35,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (1/1) ... [2024-10-31 21:56:35,278 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (1/1) ... [2024-10-31 21:56:35,292 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:56:35,293 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:56:35,293 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:56:35,293 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:56:35,294 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (1/1) ... [2024-10-31 21:56:35,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:35,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae409930-640d-49a5-a946-fb1394ead2d2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:35,343 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae409930-640d-49a5-a946-fb1394ead2d2/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:56:35,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae409930-640d-49a5-a946-fb1394ead2d2/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:56:35,381 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-31 21:56:35,382 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-31 21:56:35,382 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-31 21:56:35,382 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-31 21:56:35,382 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-31 21:56:35,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:56:35,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:56:35,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 21:56:35,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-31 21:56:35,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:56:35,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:56:35,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 21:56:35,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-31 21:56:35,384 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-31 21:56:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:56:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:56:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:56:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 21:56:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 21:56:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:56:35,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:56:35,389 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 21:56:35,584 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:56:35,586 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:56:37,239 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 21:56:37,239 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:56:45,593 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:56:45,594 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 21:56:45,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:45 BoogieIcfgContainer [2024-10-31 21:56:45,595 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:56:45,597 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:56:45,597 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:56:45,601 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:56:45,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:56:33" (1/3) ... [2024-10-31 21:56:45,602 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497dcf0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:56:45, skipping insertion in model container [2024-10-31 21:56:45,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:34" (2/3) ... [2024-10-31 21:56:45,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497dcf0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:56:45, skipping insertion in model container [2024-10-31 21:56:45,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:45" (3/3) ... [2024-10-31 21:56:45,606 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2024-10-31 21:56:45,628 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:56:45,629 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 53 error locations. [2024-10-31 21:56:45,629 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 21:56:45,910 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 21:56:45,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 129 transitions, 272 flow [2024-10-31 21:56:46,095 INFO L124 PetriNetUnfolderBase]: 11/127 cut-off events. [2024-10-31 21:56:46,099 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 21:56:46,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 127 events. 11/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 405 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2024-10-31 21:56:46,108 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 129 transitions, 272 flow [2024-10-31 21:56:46,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 126 transitions, 264 flow [2024-10-31 21:56:46,129 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:56:46,141 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;@6e5d1f77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:56:46,142 INFO L334 AbstractCegarLoop]: Starting to check reachability of 96 error locations. [2024-10-31 21:56:46,175 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 21:56:46,176 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-10-31 21:56:46,176 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 21:56:46,176 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:46,177 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-31 21:56:46,178 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 21:56:46,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:46,184 INFO L85 PathProgramCache]: Analyzing trace with hash 69449, now seen corresponding path program 1 times [2024-10-31 21:56:46,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:46,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695090825] [2024-10-31 21:56:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:46,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:47,228 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 21:56:47,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:47,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695090825] [2024-10-31 21:56:47,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695090825] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:47,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:47,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 21:56:47,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362043894] [2024-10-31 21:56:47,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:47,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:47,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:47,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:47,435 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 129 [2024-10-31 21:56:47,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 126 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 21:56:47,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:47,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 129 [2024-10-31 21:56:47,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:48,204 INFO L124 PetriNetUnfolderBase]: 1089/2984 cut-off events. [2024-10-31 21:56:48,205 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-31 21:56:48,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 2984 events. 1089/2984 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23575 event pairs, 839 based on Foata normal form. 68/2109 useless extension candidates. Maximal degree in co-relation 4570. Up to 1689 conditions per place. [2024-10-31 21:56:48,258 INFO L140 encePairwiseOnDemand]: 121/129 looper letters, 45 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2024-10-31 21:56:48,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 114 transitions, 334 flow [2024-10-31 21:56:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:56:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2024-10-31 21:56:48,277 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6873385012919897 [2024-10-31 21:56:48,280 INFO L175 Difference]: Start difference. First operand has 122 places, 126 transitions, 264 flow. Second operand 3 states and 266 transitions. [2024-10-31 21:56:48,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 114 transitions, 334 flow [2024-10-31 21:56:48,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 21:56:48,295 INFO L231 Difference]: Finished difference. Result has 112 places, 114 transitions, 236 flow [2024-10-31 21:56:48,302 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=112, PETRI_TRANSITIONS=114} [2024-10-31 21:56:48,308 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -10 predicate places. [2024-10-31 21:56:48,309 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 114 transitions, 236 flow [2024-10-31 21:56:48,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 21:56:48,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:48,311 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-31 21:56:48,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:56:48,312 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 21:56:48,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:48,314 INFO L85 PathProgramCache]: Analyzing trace with hash 69450, now seen corresponding path program 1 times [2024-10-31 21:56:48,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:48,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218515685] [2024-10-31 21:56:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:48,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:49,271 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 21:56:49,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:49,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218515685] [2024-10-31 21:56:49,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218515685] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:49,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:49,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 21:56:49,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2743155] [2024-10-31 21:56:49,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:49,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:49,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:49,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:49,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:49,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 129 [2024-10-31 21:56:49,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 114 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 21:56:49,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:49,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 129 [2024-10-31 21:56:49,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:49,905 INFO L124 PetriNetUnfolderBase]: 1089/2981 cut-off events. [2024-10-31 21:56:49,906 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-31 21:56:49,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4690 conditions, 2981 events. 1089/2981 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23571 event pairs, 839 based on Foata normal form. 3/2043 useless extension candidates. Maximal degree in co-relation 4679. Up to 1689 conditions per place. [2024-10-31 21:56:49,929 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 45 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-10-31 21:56:49,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 324 flow [2024-10-31 21:56:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:56:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-10-31 21:56:49,932 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6795865633074936 [2024-10-31 21:56:49,933 INFO L175 Difference]: Start difference. First operand has 112 places, 114 transitions, 236 flow. Second operand 3 states and 263 transitions. [2024-10-31 21:56:49,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 324 flow [2024-10-31 21:56:49,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 111 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:49,936 INFO L231 Difference]: Finished difference. Result has 109 places, 111 transitions, 230 flow [2024-10-31 21:56:49,938 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=109, PETRI_TRANSITIONS=111} [2024-10-31 21:56:49,939 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -13 predicate places. [2024-10-31 21:56:49,940 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 111 transitions, 230 flow [2024-10-31 21:56:49,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 21:56:49,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:49,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 21:56:49,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:56:49,942 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 21:56:49,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:49,944 INFO L85 PathProgramCache]: Analyzing trace with hash 2071095474, now seen corresponding path program 1 times [2024-10-31 21:56:49,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:49,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836377654] [2024-10-31 21:56:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:49,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:50,461 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 21:56:50,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:50,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836377654] [2024-10-31 21:56:50,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836377654] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:50,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:50,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:56:50,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745382083] [2024-10-31 21:56:50,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:50,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:50,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:50,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:50,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:50,587 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-10-31 21:56:50,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 111 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:50,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:50,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-10-31 21:56:50,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:51,183 INFO L124 PetriNetUnfolderBase]: 1089/2979 cut-off events. [2024-10-31 21:56:51,183 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-31 21:56:51,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4688 conditions, 2979 events. 1089/2979 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23545 event pairs, 839 based on Foata normal form. 1/2041 useless extension candidates. Maximal degree in co-relation 4677. Up to 1688 conditions per place. [2024-10-31 21:56:51,207 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 44 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-10-31 21:56:51,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 320 flow [2024-10-31 21:56:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:56:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:56:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2024-10-31 21:56:51,212 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6531007751937985 [2024-10-31 21:56:51,212 INFO L175 Difference]: Start difference. First operand has 109 places, 111 transitions, 230 flow. Second operand 4 states and 337 transitions. [2024-10-31 21:56:51,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 320 flow [2024-10-31 21:56:51,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 109 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:51,218 INFO L231 Difference]: Finished difference. Result has 108 places, 109 transitions, 228 flow [2024-10-31 21:56:51,218 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=108, PETRI_TRANSITIONS=109} [2024-10-31 21:56:51,219 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -14 predicate places. [2024-10-31 21:56:51,219 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 109 transitions, 228 flow [2024-10-31 21:56:51,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:51,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:51,221 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 21:56:51,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 21:56:51,222 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 21:56:51,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:51,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2071095475, now seen corresponding path program 1 times [2024-10-31 21:56:51,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:51,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777263867] [2024-10-31 21:56:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:51,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:51,809 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 21:56:51,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:51,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777263867] [2024-10-31 21:56:51,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777263867] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:51,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:51,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:56:51,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666054978] [2024-10-31 21:56:51,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:51,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:51,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:51,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:51,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:52,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-10-31 21:56:52,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 109 transitions, 228 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:52,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:52,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-10-31 21:56:52,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:52,589 INFO L124 PetriNetUnfolderBase]: 1089/2977 cut-off events. [2024-10-31 21:56:52,589 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-31 21:56:52,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 2977 events. 1089/2977 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23568 event pairs, 839 based on Foata normal form. 2/2041 useless extension candidates. Maximal degree in co-relation 4672. Up to 1688 conditions per place. [2024-10-31 21:56:52,608 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 44 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2024-10-31 21:56:52,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 107 transitions, 318 flow [2024-10-31 21:56:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:56:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:56:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2024-10-31 21:56:52,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6531007751937985 [2024-10-31 21:56:52,610 INFO L175 Difference]: Start difference. First operand has 108 places, 109 transitions, 228 flow. Second operand 4 states and 337 transitions. [2024-10-31 21:56:52,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 107 transitions, 318 flow [2024-10-31 21:56:52,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 107 transitions, 312 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:56:52,613 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 224 flow [2024-10-31 21:56:52,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=106, PETRI_TRANSITIONS=107} [2024-10-31 21:56:52,615 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -16 predicate places. [2024-10-31 21:56:52,615 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 224 flow [2024-10-31 21:56:52,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:52,616 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:52,616 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:52,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 21:56:52,616 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 21:56:52,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:52,617 INFO L85 PathProgramCache]: Analyzing trace with hash 902343804, now seen corresponding path program 1 times [2024-10-31 21:56:52,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:52,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394149755] [2024-10-31 21:56:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:52,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:53,094 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 21:56:53,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:53,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394149755] [2024-10-31 21:56:53,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394149755] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:53,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:53,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:56:53,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080512323] [2024-10-31 21:56:53,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:53,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:53,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:53,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:53,341 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 129 [2024-10-31 21:56:53,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 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 21:56:53,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:53,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 129 [2024-10-31 21:56:53,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:53,815 INFO L124 PetriNetUnfolderBase]: 1046/2622 cut-off events. [2024-10-31 21:56:53,815 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-31 21:56:53,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4287 conditions, 2622 events. 1046/2622 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 19408 event pairs, 426 based on Foata normal form. 120/2116 useless extension candidates. Maximal degree in co-relation 4272. Up to 882 conditions per place. [2024-10-31 21:56:53,834 INFO L140 encePairwiseOnDemand]: 118/129 looper letters, 67 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-10-31 21:56:53,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 122 transitions, 395 flow [2024-10-31 21:56:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:56:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:56:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2024-10-31 21:56:53,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6627906976744186 [2024-10-31 21:56:53,836 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 224 flow. Second operand 4 states and 342 transitions. [2024-10-31 21:56:53,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 122 transitions, 395 flow [2024-10-31 21:56:53,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 122 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:56:53,840 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 208 flow [2024-10-31 21:56:53,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2024-10-31 21:56:53,841 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-10-31 21:56:53,841 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 208 flow [2024-10-31 21:56:53,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 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 21:56:53,842 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:53,842 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:53,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 21:56:53,843 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 21:56:53,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:53,843 INFO L85 PathProgramCache]: Analyzing trace with hash 902343805, now seen corresponding path program 1 times [2024-10-31 21:56:53,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:53,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539963543] [2024-10-31 21:56:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:53,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:54,446 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 21:56:54,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:54,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539963543] [2024-10-31 21:56:54,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539963543] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:54,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:54,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:56:54,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352468872] [2024-10-31 21:56:54,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:54,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:54,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:54,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:54,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:54,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 129 [2024-10-31 21:56:54,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:54,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:54,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 129 [2024-10-31 21:56:54,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:55,191 INFO L124 PetriNetUnfolderBase]: 1046/2354 cut-off events. [2024-10-31 21:56:55,192 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-10-31 21:56:55,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4097 conditions, 2354 events. 1046/2354 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 15823 event pairs, 426 based on Foata normal form. 120/2000 useless extension candidates. Maximal degree in co-relation 1953. Up to 882 conditions per place. [2024-10-31 21:56:55,209 INFO L140 encePairwiseOnDemand]: 119/129 looper letters, 67 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2024-10-31 21:56:55,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 115 transitions, 381 flow [2024-10-31 21:56:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:56:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:56:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 345 transitions. [2024-10-31 21:56:55,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6686046511627907 [2024-10-31 21:56:55,212 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 208 flow. Second operand 4 states and 345 transitions. [2024-10-31 21:56:55,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 115 transitions, 381 flow [2024-10-31 21:56:55,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 115 transitions, 375 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:56:55,216 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 194 flow [2024-10-31 21:56:55,216 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2024-10-31 21:56:55,217 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -31 predicate places. [2024-10-31 21:56:55,217 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 194 flow [2024-10-31 21:56:55,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:55,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:55,218 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:55,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 21:56:55,218 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 21:56:55,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:55,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2092110920, now seen corresponding path program 1 times [2024-10-31 21:56:55,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:55,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796963096] [2024-10-31 21:56:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:55,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:57,764 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 21:56:57,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:57,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796963096] [2024-10-31 21:56:57,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796963096] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:57,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:57,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 21:56:57,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013089136] [2024-10-31 21:56:57,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:57,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:56:57,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:57,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:56:57,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:56:58,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 129 [2024-10-31 21:56:58,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 194 flow. Second operand has 8 states, 8 states have (on average 59.625) internal successors, (477), 8 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:58,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:58,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 129 [2024-10-31 21:56:58,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:59,786 INFO L124 PetriNetUnfolderBase]: 2065/4255 cut-off events. [2024-10-31 21:56:59,787 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-10-31 21:56:59,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7679 conditions, 4255 events. 2065/4255 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 29549 event pairs, 289 based on Foata normal form. 0/3449 useless extension candidates. Maximal degree in co-relation 2484. Up to 2157 conditions per place. [2024-10-31 21:56:59,815 INFO L140 encePairwiseOnDemand]: 119/129 looper letters, 131 selfloop transitions, 12 changer transitions 0/182 dead transitions. [2024-10-31 21:56:59,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 182 transitions, 667 flow [2024-10-31 21:56:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:56:59,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 21:56:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 609 transitions. [2024-10-31 21:56:59,818 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5901162790697675 [2024-10-31 21:56:59,819 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 194 flow. Second operand 8 states and 609 transitions. [2024-10-31 21:56:59,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 182 transitions, 667 flow [2024-10-31 21:56:59,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 182 transitions, 659 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:56:59,826 INFO L231 Difference]: Finished difference. Result has 99 places, 102 transitions, 264 flow [2024-10-31 21:56:59,827 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=264, PETRI_PLACES=99, PETRI_TRANSITIONS=102} [2024-10-31 21:56:59,827 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -23 predicate places. [2024-10-31 21:56:59,828 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 102 transitions, 264 flow [2024-10-31 21:56:59,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 59.625) internal successors, (477), 8 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:59,828 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:59,829 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:59,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 21:56:59,829 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 21:56:59,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:59,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1088727253, now seen corresponding path program 1 times [2024-10-31 21:56:59,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:59,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098338713] [2024-10-31 21:56:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:59,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms