./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:44:04,513 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:44:04,593 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 17:44:04,598 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:44:04,598 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:44:04,623 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:44:04,623 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:44:04,624 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:44:04,624 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:44:04,625 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:44:04,625 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:44:04,626 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:44:04,627 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:44:04,627 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:44:04,627 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:44:04,628 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:44:04,628 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:44:04,629 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:44:04,629 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:44:04,630 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:44:04,630 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 17:44:04,631 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 17:44:04,631 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 17:44:04,631 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:44:04,632 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:44:04,632 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:44:04,632 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 17:44:04,633 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:44:04,633 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:44:04,633 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:44:04,634 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:44:04,634 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:44:04,634 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:44:04,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:44:04,635 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:44:04,636 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:44:04,636 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:44:04,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:44:04,637 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:44:04,637 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:44:04,637 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:44:04,638 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:44:04,638 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_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a [2024-11-08 17:44:04,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:44:04,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:44:04,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:44:04,949 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:44:04,950 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:44:04,951 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c Unable to find full path for "g++" [2024-11-08 17:44:06,875 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:44:07,142 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:44:07,144 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2024-11-08 17:44:07,153 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/data/425ec4169/9adb0c74448148d08f882d8c56c3c43d/FLAG9f4068f5f [2024-11-08 17:44:07,171 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/data/425ec4169/9adb0c74448148d08f882d8c56c3c43d [2024-11-08 17:44:07,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:44:07,174 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:44:07,176 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:44:07,176 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:44:07,181 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:44:07,182 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,184 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@766c58fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07, skipping insertion in model container [2024-11-08 17:44:07,186 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,222 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:44:07,480 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 17:44:07,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:44:07,492 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:44:07,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:44:07,536 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:44:07,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07 WrapperNode [2024-11-08 17:44:07,536 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:44:07,537 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:44:07,537 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:44:07,537 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:44:07,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,552 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,578 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 167 [2024-11-08 17:44:07,578 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:44:07,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:44:07,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:44:07,579 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:44:07,592 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,595 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,619 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-08 17:44:07,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,627 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,632 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,636 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,640 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,648 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:44:07,649 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:44:07,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:44:07,649 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:44:07,650 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (1/1) ... [2024-11-08 17:44:07,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:44:07,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:44:07,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:44:07,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:44:07,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:44:07,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 17:44:07,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 17:44:07,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 17:44:07,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 17:44:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:44:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 17:44:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:44:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:44:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:44:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:44:07,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:44:07,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:44:07,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:44:07,724 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 17:44:07,855 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:44:07,857 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:44:08,275 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:44:08,275 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:44:08,572 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:44:08,576 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 17:44:08,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:44:08 BoogieIcfgContainer [2024-11-08 17:44:08,577 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:44:08,582 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:44:08,582 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:44:08,586 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:44:08,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:44:07" (1/3) ... [2024-11-08 17:44:08,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a2e3fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:44:08, skipping insertion in model container [2024-11-08 17:44:08,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:44:07" (2/3) ... [2024-11-08 17:44:08,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a2e3fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:44:08, skipping insertion in model container [2024-11-08 17:44:08,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:44:08" (3/3) ... [2024-11-08 17:44:08,593 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2024-11-08 17:44:08,612 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:44:08,612 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-08 17:44:08,612 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:44:08,707 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 17:44:08,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 76 transitions, 166 flow [2024-11-08 17:44:08,809 INFO L124 PetriNetUnfolderBase]: 12/74 cut-off events. [2024-11-08 17:44:08,809 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 17:44:08,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 12/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 207 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 51. Up to 3 conditions per place. [2024-11-08 17:44:08,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 76 transitions, 166 flow [2024-11-08 17:44:08,819 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 73 transitions, 158 flow [2024-11-08 17:44:08,828 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:44:08,835 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;@407840b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:44:08,835 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-08 17:44:08,840 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:44:08,840 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 17:44:08,840 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:44:08,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:08,841 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:44:08,842 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:08,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:08,847 INFO L85 PathProgramCache]: Analyzing trace with hash 16471344, now seen corresponding path program 1 times [2024-11-08 17:44:08,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:08,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190048495] [2024-11-08 17:44:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:08,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:44:09,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:09,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190048495] [2024-11-08 17:44:09,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190048495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:44:09,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:44:09,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 17:44:09,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184374521] [2024-11-08 17:44:09,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:09,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:44:09,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:09,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:44:09,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:44:09,213 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 76 [2024-11-08 17:44:09,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:09,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:09,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 76 [2024-11-08 17:44:09,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:09,364 INFO L124 PetriNetUnfolderBase]: 180/368 cut-off events. [2024-11-08 17:44:09,364 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-08 17:44:09,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 368 events. 180/368 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1532 event pairs, 90 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 584. Up to 258 conditions per place. [2024-11-08 17:44:09,375 INFO L140 encePairwiseOnDemand]: 71/76 looper letters, 26 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-11-08 17:44:09,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 69 transitions, 206 flow [2024-11-08 17:44:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:44:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:44:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2024-11-08 17:44:09,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7149122807017544 [2024-11-08 17:44:09,392 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 158 flow. Second operand 3 states and 163 transitions. [2024-11-08 17:44:09,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 69 transitions, 206 flow [2024-11-08 17:44:09,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 198 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:44:09,402 INFO L231 Difference]: Finished difference. Result has 62 places, 69 transitions, 146 flow [2024-11-08 17:44:09,405 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=62, PETRI_TRANSITIONS=69} [2024-11-08 17:44:09,410 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2024-11-08 17:44:09,410 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 69 transitions, 146 flow [2024-11-08 17:44:09,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:09,411 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:09,411 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:44:09,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:44:09,411 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:09,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:09,412 INFO L85 PathProgramCache]: Analyzing trace with hash 16471345, now seen corresponding path program 1 times [2024-11-08 17:44:09,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:09,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495937816] [2024-11-08 17:44:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:09,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:44:09,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:09,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495937816] [2024-11-08 17:44:09,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495937816] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:44:09,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:44:09,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:44:09,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495851841] [2024-11-08 17:44:09,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:09,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:44:09,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:09,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:44:09,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:44:09,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 76 [2024-11-08 17:44:09,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 69 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:09,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:09,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 76 [2024-11-08 17:44:09,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:10,116 INFO L124 PetriNetUnfolderBase]: 184/380 cut-off events. [2024-11-08 17:44:10,117 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-08 17:44:10,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663 conditions, 380 events. 184/380 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1585 event pairs, 90 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 615. Up to 267 conditions per place. [2024-11-08 17:44:10,120 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 31 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2024-11-08 17:44:10,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 232 flow [2024-11-08 17:44:10,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:44:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:44:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2024-11-08 17:44:10,125 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7456140350877193 [2024-11-08 17:44:10,125 INFO L175 Difference]: Start difference. First operand has 62 places, 69 transitions, 146 flow. Second operand 3 states and 170 transitions. [2024-11-08 17:44:10,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 232 flow [2024-11-08 17:44:10,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 75 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:44:10,130 INFO L231 Difference]: Finished difference. Result has 64 places, 73 transitions, 182 flow [2024-11-08 17:44:10,131 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=64, PETRI_TRANSITIONS=73} [2024-11-08 17:44:10,131 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -4 predicate places. [2024-11-08 17:44:10,131 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 73 transitions, 182 flow [2024-11-08 17:44:10,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:10,132 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:10,132 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 17:44:10,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:44:10,132 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:10,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:10,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1072100311, now seen corresponding path program 1 times [2024-11-08 17:44:10,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:10,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147772282] [2024-11-08 17:44:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:10,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:44:10,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:10,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147772282] [2024-11-08 17:44:10,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147772282] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:44:10,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422956883] [2024-11-08 17:44:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:10,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:44:10,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:44:10,526 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:44:10,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:44:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:10,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 17:44:10,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:44:10,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:44:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:44:10,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:44:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:44:10,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422956883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:44:10,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:44:10,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-08 17:44:10,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709333165] [2024-11-08 17:44:10,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:44:10,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 17:44:10,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 17:44:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-08 17:44:11,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 76 [2024-11-08 17:44:11,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 73 transitions, 182 flow. Second operand has 9 states, 9 states have (on average 41.666666666666664) internal successors, (375), 9 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:11,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:11,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 76 [2024-11-08 17:44:11,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:11,741 INFO L124 PetriNetUnfolderBase]: 188/404 cut-off events. [2024-11-08 17:44:11,741 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-08 17:44:11,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 404 events. 188/404 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1595 event pairs, 90 based on Foata normal form. 4/285 useless extension candidates. Maximal degree in co-relation 663. Up to 272 conditions per place. [2024-11-08 17:44:11,749 INFO L140 encePairwiseOnDemand]: 65/76 looper letters, 48 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2024-11-08 17:44:11,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 372 flow [2024-11-08 17:44:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:44:11,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:44:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 316 transitions. [2024-11-08 17:44:11,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6929824561403509 [2024-11-08 17:44:11,752 INFO L175 Difference]: Start difference. First operand has 64 places, 73 transitions, 182 flow. Second operand 6 states and 316 transitions. [2024-11-08 17:44:11,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 372 flow [2024-11-08 17:44:11,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 354 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-08 17:44:11,759 INFO L231 Difference]: Finished difference. Result has 71 places, 81 transitions, 282 flow [2024-11-08 17:44:11,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=71, PETRI_TRANSITIONS=81} [2024-11-08 17:44:11,760 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2024-11-08 17:44:11,760 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 81 transitions, 282 flow [2024-11-08 17:44:11,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 41.666666666666664) internal successors, (375), 9 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:11,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:11,762 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-08 17:44:11,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 17:44:11,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:44:11,963 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:11,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:11,963 INFO L85 PathProgramCache]: Analyzing trace with hash -89714255, now seen corresponding path program 2 times [2024-11-08 17:44:11,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:11,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543877386] [2024-11-08 17:44:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:11,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:44:12,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:12,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543877386] [2024-11-08 17:44:12,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543877386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:44:12,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070953047] [2024-11-08 17:44:12,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:44:12,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:44:12,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:44:12,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:44:12,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:44:12,524 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:44:12,524 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:44:12,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:44:12,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:44:12,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:44:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:44:12,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:44:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:44:13,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070953047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:44:13,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:44:13,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-08 17:44:13,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928095097] [2024-11-08 17:44:13,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:44:13,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 17:44:13,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:13,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 17:44:13,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2024-11-08 17:44:14,820 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 76 [2024-11-08 17:44:14,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 81 transitions, 282 flow. Second operand has 20 states, 20 states have (on average 40.4) internal successors, (808), 20 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:14,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:14,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 76 [2024-11-08 17:44:14,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:15,475 INFO L124 PetriNetUnfolderBase]: 178/390 cut-off events. [2024-11-08 17:44:15,475 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-08 17:44:15,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 390 events. 178/390 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1502 event pairs, 90 based on Foata normal form. 14/289 useless extension candidates. Maximal degree in co-relation 641. Up to 258 conditions per place. [2024-11-08 17:44:15,478 INFO L140 encePairwiseOnDemand]: 63/76 looper letters, 43 selfloop transitions, 15 changer transitions 0/91 dead transitions. [2024-11-08 17:44:15,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 91 transitions, 376 flow [2024-11-08 17:44:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:44:15,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 17:44:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 376 transitions. [2024-11-08 17:44:15,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.618421052631579 [2024-11-08 17:44:15,481 INFO L175 Difference]: Start difference. First operand has 71 places, 81 transitions, 282 flow. Second operand 8 states and 376 transitions. [2024-11-08 17:44:15,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 91 transitions, 376 flow [2024-11-08 17:44:15,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 342 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-08 17:44:15,484 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 260 flow [2024-11-08 17:44:15,484 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=260, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-11-08 17:44:15,485 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 8 predicate places. [2024-11-08 17:44:15,485 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 260 flow [2024-11-08 17:44:15,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 40.4) internal successors, (808), 20 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:15,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:15,486 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:15,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:44:15,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:44:15,691 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:15,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:15,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1698633364, now seen corresponding path program 1 times [2024-11-08 17:44:15,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:15,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492009342] [2024-11-08 17:44:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:15,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-08 17:44:15,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:15,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492009342] [2024-11-08 17:44:15,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492009342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:44:15,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:44:15,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:44:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686739845] [2024-11-08 17:44:15,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:15,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:44:15,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:15,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:44:15,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:44:15,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 76 [2024-11-08 17:44:15,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 39.4) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:15,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:15,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 76 [2024-11-08 17:44:15,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:16,137 INFO L124 PetriNetUnfolderBase]: 253/512 cut-off events. [2024-11-08 17:44:16,137 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-08 17:44:16,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 512 events. 253/512 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2138 event pairs, 145 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 868. Up to 373 conditions per place. [2024-11-08 17:44:16,141 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 36 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2024-11-08 17:44:16,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 330 flow [2024-11-08 17:44:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:44:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:44:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 220 transitions. [2024-11-08 17:44:16,143 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-11-08 17:44:16,143 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 260 flow. Second operand 5 states and 220 transitions. [2024-11-08 17:44:16,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 330 flow [2024-11-08 17:44:16,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 304 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-08 17:44:16,147 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 232 flow [2024-11-08 17:44:16,147 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-11-08 17:44:16,148 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2024-11-08 17:44:16,148 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 232 flow [2024-11-08 17:44:16,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.4) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:16,148 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:16,148 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:16,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 17:44:16,149 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:16,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:16,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1698633363, now seen corresponding path program 1 times [2024-11-08 17:44:16,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:16,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550851267] [2024-11-08 17:44:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:16,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-08 17:44:16,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:16,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550851267] [2024-11-08 17:44:16,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550851267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:44:16,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897899991] [2024-11-08 17:44:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:16,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:44:16,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:44:16,755 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:44:16,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:44:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:16,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-08 17:44:16,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:44:16,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:44:16,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:44:17,079 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 17:44:17,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 17:44:17,097 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:44:17,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 17:44:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:17,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:44:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:18,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897899991] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:44:18,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:44:18,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 8] total 22 [2024-11-08 17:44:18,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892320614] [2024-11-08 17:44:18,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:18,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 17:44:18,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:18,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 17:44:18,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2024-11-08 17:44:18,894 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2024-11-08 17:44:18,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 43.8) internal successors, (438), 10 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:18,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:18,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2024-11-08 17:44:18,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:19,185 INFO L124 PetriNetUnfolderBase]: 305/626 cut-off events. [2024-11-08 17:44:19,186 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-08 17:44:19,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1169 conditions, 626 events. 305/626 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2695 event pairs, 88 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 1053. Up to 304 conditions per place. [2024-11-08 17:44:19,190 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 48 selfloop transitions, 6 changer transitions 0/85 dead transitions. [2024-11-08 17:44:19,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 85 transitions, 371 flow [2024-11-08 17:44:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:44:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:44:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 300 transitions. [2024-11-08 17:44:19,192 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-11-08 17:44:19,192 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 232 flow. Second operand 6 states and 300 transitions. [2024-11-08 17:44:19,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 85 transitions, 371 flow [2024-11-08 17:44:19,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 366 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:44:19,196 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 250 flow [2024-11-08 17:44:19,198 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-08 17:44:19,199 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2024-11-08 17:44:19,200 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 250 flow [2024-11-08 17:44:19,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 43.8) internal successors, (438), 10 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:19,201 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:19,201 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:19,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 17:44:19,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 17:44:19,405 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:19,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:19,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1118026200, now seen corresponding path program 1 times [2024-11-08 17:44:19,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:19,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624044271] [2024-11-08 17:44:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:19,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-08 17:44:19,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:19,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624044271] [2024-11-08 17:44:19,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624044271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:44:19,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:44:19,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:44:19,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765481837] [2024-11-08 17:44:19,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:19,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:44:19,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:44:19,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:44:19,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 76 [2024-11-08 17:44:19,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:19,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:19,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 76 [2024-11-08 17:44:19,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:19,736 INFO L124 PetriNetUnfolderBase]: 338/683 cut-off events. [2024-11-08 17:44:19,737 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2024-11-08 17:44:19,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 683 events. 338/683 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3110 event pairs, 203 based on Foata normal form. 0/583 useless extension candidates. Maximal degree in co-relation 1264. Up to 491 conditions per place. [2024-11-08 17:44:19,741 INFO L140 encePairwiseOnDemand]: 70/76 looper letters, 37 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-11-08 17:44:19,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 67 transitions, 320 flow [2024-11-08 17:44:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:44:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:44:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 183 transitions. [2024-11-08 17:44:19,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6019736842105263 [2024-11-08 17:44:19,743 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 250 flow. Second operand 4 states and 183 transitions. [2024-11-08 17:44:19,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 67 transitions, 320 flow [2024-11-08 17:44:19,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 312 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:44:19,746 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 238 flow [2024-11-08 17:44:19,747 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-11-08 17:44:19,747 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2024-11-08 17:44:19,749 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 238 flow [2024-11-08 17:44:19,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:19,751 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:19,751 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:19,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 17:44:19,751 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:19,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1118026199, now seen corresponding path program 1 times [2024-11-08 17:44:19,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:19,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133531930] [2024-11-08 17:44:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:19,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:20,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:20,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133531930] [2024-11-08 17:44:20,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133531930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:44:20,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467783491] [2024-11-08 17:44:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:20,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:44:20,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:44:20,260 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:44:20,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:44:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:20,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 17:44:20,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:44:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:20,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:44:20,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-08 17:44:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:20,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467783491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:44:20,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:44:20,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-08 17:44:20,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086369062] [2024-11-08 17:44:20,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:44:20,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 17:44:20,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:20,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 17:44:20,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-08 17:44:21,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 76 [2024-11-08 17:44:21,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 238 flow. Second operand has 25 states, 25 states have (on average 44.88) internal successors, (1122), 25 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:21,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:21,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 76 [2024-11-08 17:44:21,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:22,341 INFO L124 PetriNetUnfolderBase]: 488/1010 cut-off events. [2024-11-08 17:44:22,341 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-11-08 17:44:22,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1933 conditions, 1010 events. 488/1010 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4896 event pairs, 61 based on Foata normal form. 0/852 useless extension candidates. Maximal degree in co-relation 1816. Up to 325 conditions per place. [2024-11-08 17:44:22,348 INFO L140 encePairwiseOnDemand]: 66/76 looper letters, 66 selfloop transitions, 15 changer transitions 0/109 dead transitions. [2024-11-08 17:44:22,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 493 flow [2024-11-08 17:44:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:44:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 17:44:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 515 transitions. [2024-11-08 17:44:22,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6776315789473685 [2024-11-08 17:44:22,350 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 238 flow. Second operand 10 states and 515 transitions. [2024-11-08 17:44:22,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 493 flow [2024-11-08 17:44:22,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:44:22,354 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 285 flow [2024-11-08 17:44:22,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=285, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2024-11-08 17:44:22,355 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 9 predicate places. [2024-11-08 17:44:22,355 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 285 flow [2024-11-08 17:44:22,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.88) internal successors, (1122), 25 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:22,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:22,356 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:22,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 17:44:22,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:44:22,557 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:22,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:22,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1543424501, now seen corresponding path program 1 times [2024-11-08 17:44:22,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:22,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555721733] [2024-11-08 17:44:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:22,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:23,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:23,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555721733] [2024-11-08 17:44:23,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555721733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:44:23,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180225521] [2024-11-08 17:44:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:23,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:44:23,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:44:23,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:44:23,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:44:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:23,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 17:44:23,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:44:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:23,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:44:23,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-08 17:44:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:23,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180225521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:44:23,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:44:23,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2024-11-08 17:44:23,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586007754] [2024-11-08 17:44:23,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:44:23,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 17:44:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 17:44:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2024-11-08 17:44:24,905 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2024-11-08 17:44:24,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 285 flow. Second operand has 26 states, 26 states have (on average 44.07692307692308) internal successors, (1146), 26 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:24,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:24,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2024-11-08 17:44:24,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:25,763 INFO L124 PetriNetUnfolderBase]: 1061/2284 cut-off events. [2024-11-08 17:44:25,763 INFO L125 PetriNetUnfolderBase]: For 823/823 co-relation queries the response was YES. [2024-11-08 17:44:25,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4386 conditions, 2284 events. 1061/2284 cut-off events. For 823/823 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 13721 event pairs, 169 based on Foata normal form. 0/1915 useless extension candidates. Maximal degree in co-relation 4257. Up to 596 conditions per place. [2024-11-08 17:44:25,779 INFO L140 encePairwiseOnDemand]: 66/76 looper letters, 67 selfloop transitions, 15 changer transitions 0/109 dead transitions. [2024-11-08 17:44:25,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 109 transitions, 577 flow [2024-11-08 17:44:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:44:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 17:44:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 503 transitions. [2024-11-08 17:44:25,782 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6618421052631579 [2024-11-08 17:44:25,782 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 285 flow. Second operand 10 states and 503 transitions. [2024-11-08 17:44:25,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 109 transitions, 577 flow [2024-11-08 17:44:25,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 556 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 17:44:25,786 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 311 flow [2024-11-08 17:44:25,786 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=311, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2024-11-08 17:44:25,787 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 14 predicate places. [2024-11-08 17:44:25,787 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 311 flow [2024-11-08 17:44:25,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 44.07692307692308) internal successors, (1146), 26 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:25,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:25,788 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:25,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 17:44:25,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-08 17:44:25,989 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:25,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:25,990 INFO L85 PathProgramCache]: Analyzing trace with hash -601518750, now seen corresponding path program 1 times [2024-11-08 17:44:25,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:25,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778230413] [2024-11-08 17:44:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:25,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-08 17:44:26,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778230413] [2024-11-08 17:44:26,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778230413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:44:26,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286352426] [2024-11-08 17:44:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:26,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:44:26,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:44:26,474 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:44:26,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:44:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:26,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-08 17:44:26,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:44:26,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:44:26,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:44:26,744 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:44:26,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 17:44:26,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:44:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:27,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:44:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:27,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286352426] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:44:27,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:44:27,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 8] total 22 [2024-11-08 17:44:27,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190588204] [2024-11-08 17:44:27,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:27,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 17:44:27,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:27,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 17:44:27,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2024-11-08 17:44:28,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 76 [2024-11-08 17:44:28,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 311 flow. Second operand has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:28,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:28,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 76 [2024-11-08 17:44:28,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:28,844 INFO L124 PetriNetUnfolderBase]: 985/2104 cut-off events. [2024-11-08 17:44:28,844 INFO L125 PetriNetUnfolderBase]: For 972/972 co-relation queries the response was YES. [2024-11-08 17:44:28,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4434 conditions, 2104 events. 985/2104 cut-off events. For 972/972 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12699 event pairs, 257 based on Foata normal form. 0/1894 useless extension candidates. Maximal degree in co-relation 4302. Up to 932 conditions per place. [2024-11-08 17:44:28,859 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 47 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2024-11-08 17:44:28,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 82 transitions, 468 flow [2024-11-08 17:44:28,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:44:28,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:44:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 303 transitions. [2024-11-08 17:44:28,861 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6644736842105263 [2024-11-08 17:44:28,861 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 311 flow. Second operand 6 states and 303 transitions. [2024-11-08 17:44:28,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 82 transitions, 468 flow [2024-11-08 17:44:28,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 447 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 17:44:28,865 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 317 flow [2024-11-08 17:44:28,866 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=317, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2024-11-08 17:44:28,866 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 14 predicate places. [2024-11-08 17:44:28,867 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 317 flow [2024-11-08 17:44:28,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:28,867 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:28,867 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:28,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 17:44:29,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 17:44:29,068 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:29,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:29,069 INFO L85 PathProgramCache]: Analyzing trace with hash 837248987, now seen corresponding path program 1 times [2024-11-08 17:44:29,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:29,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732642095] [2024-11-08 17:44:29,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:29,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:44:29,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:29,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732642095] [2024-11-08 17:44:29,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732642095] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:44:29,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:44:29,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:44:29,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086856220] [2024-11-08 17:44:29,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:29,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:44:29,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:29,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:44:29,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:44:29,167 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 76 [2024-11-08 17:44:29,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:29,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:29,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 76 [2024-11-08 17:44:29,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:29,651 INFO L124 PetriNetUnfolderBase]: 1349/2912 cut-off events. [2024-11-08 17:44:29,651 INFO L125 PetriNetUnfolderBase]: For 2373/2373 co-relation queries the response was YES. [2024-11-08 17:44:29,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6425 conditions, 2912 events. 1349/2912 cut-off events. For 2373/2373 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 18836 event pairs, 601 based on Foata normal form. 60/2697 useless extension candidates. Maximal degree in co-relation 6299. Up to 1299 conditions per place. [2024-11-08 17:44:29,681 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 64 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2024-11-08 17:44:29,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 97 transitions, 557 flow [2024-11-08 17:44:29,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:44:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:44:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 239 transitions. [2024-11-08 17:44:29,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7861842105263158 [2024-11-08 17:44:29,683 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 317 flow. Second operand 4 states and 239 transitions. [2024-11-08 17:44:29,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 97 transitions, 557 flow [2024-11-08 17:44:29,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 97 transitions, 542 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:44:29,692 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 323 flow [2024-11-08 17:44:29,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=323, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2024-11-08 17:44:29,693 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 15 predicate places. [2024-11-08 17:44:29,693 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 323 flow [2024-11-08 17:44:29,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:29,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:29,694 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:29,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 17:44:29,695 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:29,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash -590881200, now seen corresponding path program 1 times [2024-11-08 17:44:29,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:29,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932146890] [2024-11-08 17:44:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:29,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:44:29,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:29,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932146890] [2024-11-08 17:44:29,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932146890] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:44:29,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:44:29,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:44:29,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658572974] [2024-11-08 17:44:29,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:29,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:44:29,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:29,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:44:29,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:44:29,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2024-11-08 17:44:29,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:29,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:29,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2024-11-08 17:44:29,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:30,445 INFO L124 PetriNetUnfolderBase]: 1910/3832 cut-off events. [2024-11-08 17:44:30,445 INFO L125 PetriNetUnfolderBase]: For 2712/2712 co-relation queries the response was YES. [2024-11-08 17:44:30,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8821 conditions, 3832 events. 1910/3832 cut-off events. For 2712/2712 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 24412 event pairs, 829 based on Foata normal form. 5/3384 useless extension candidates. Maximal degree in co-relation 8695. Up to 1741 conditions per place. [2024-11-08 17:44:30,471 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 73 selfloop transitions, 6 changer transitions 2/108 dead transitions. [2024-11-08 17:44:30,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 108 transitions, 611 flow [2024-11-08 17:44:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:44:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:44:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2024-11-08 17:44:30,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7342105263157894 [2024-11-08 17:44:30,473 INFO L175 Difference]: Start difference. First operand has 83 places, 70 transitions, 323 flow. Second operand 5 states and 279 transitions. [2024-11-08 17:44:30,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 108 transitions, 611 flow [2024-11-08 17:44:30,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 108 transitions, 609 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:44:30,483 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 350 flow [2024-11-08 17:44:30,483 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2024-11-08 17:44:30,483 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 20 predicate places. [2024-11-08 17:44:30,484 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 350 flow [2024-11-08 17:44:30,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:30,484 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:30,484 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:30,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 17:44:30,485 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:30,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:30,485 INFO L85 PathProgramCache]: Analyzing trace with hash -784009168, now seen corresponding path program 2 times [2024-11-08 17:44:30,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:30,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036999287] [2024-11-08 17:44:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:30,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:44:30,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036999287] [2024-11-08 17:44:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036999287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:44:30,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:44:30,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:44:30,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108628200] [2024-11-08 17:44:30,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:30,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:44:30,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:44:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:44:30,605 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 76 [2024-11-08 17:44:30,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 72 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:30,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:30,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 76 [2024-11-08 17:44:30,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:31,114 INFO L124 PetriNetUnfolderBase]: 1405/3021 cut-off events. [2024-11-08 17:44:31,115 INFO L125 PetriNetUnfolderBase]: For 3104/3104 co-relation queries the response was YES. [2024-11-08 17:44:31,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7197 conditions, 3021 events. 1405/3021 cut-off events. For 3104/3104 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 20039 event pairs, 535 based on Foata normal form. 9/2821 useless extension candidates. Maximal degree in co-relation 7068. Up to 1133 conditions per place. [2024-11-08 17:44:31,140 INFO L140 encePairwiseOnDemand]: 72/76 looper letters, 57 selfloop transitions, 3 changer transitions 1/94 dead transitions. [2024-11-08 17:44:31,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 94 transitions, 581 flow [2024-11-08 17:44:31,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:44:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:44:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2024-11-08 17:44:31,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8157894736842105 [2024-11-08 17:44:31,141 INFO L175 Difference]: Start difference. First operand has 88 places, 72 transitions, 350 flow. Second operand 3 states and 186 transitions. [2024-11-08 17:44:31,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 94 transitions, 581 flow [2024-11-08 17:44:31,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 94 transitions, 569 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:44:31,149 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 361 flow [2024-11-08 17:44:31,149 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=361, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2024-11-08 17:44:31,150 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 20 predicate places. [2024-11-08 17:44:31,150 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 361 flow [2024-11-08 17:44:31,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:31,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:31,151 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:31,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 17:44:31,151 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:31,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:31,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1312750486, now seen corresponding path program 1 times [2024-11-08 17:44:31,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:31,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486290100] [2024-11-08 17:44:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:31,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-08 17:44:31,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:31,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486290100] [2024-11-08 17:44:31,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486290100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:44:31,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074355097] [2024-11-08 17:44:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:31,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:44:31,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:44:31,572 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:44:31,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:44:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:31,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-08 17:44:31,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:44:31,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:44:31,828 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-08 17:44:31,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-08 17:44:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:32,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:44:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:32,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074355097] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:44:32,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:44:32,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2024-11-08 17:44:32,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159606715] [2024-11-08 17:44:32,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:44:32,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 17:44:32,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:32,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 17:44:32,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2024-11-08 17:44:34,939 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 76 [2024-11-08 17:44:34,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 361 flow. Second operand has 27 states, 27 states have (on average 35.148148148148145) internal successors, (949), 27 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:34,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:34,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 76 [2024-11-08 17:44:34,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:36,729 INFO L124 PetriNetUnfolderBase]: 2988/6093 cut-off events. [2024-11-08 17:44:36,729 INFO L125 PetriNetUnfolderBase]: For 5476/5476 co-relation queries the response was YES. [2024-11-08 17:44:36,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15505 conditions, 6093 events. 2988/6093 cut-off events. For 5476/5476 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 40968 event pairs, 405 based on Foata normal form. 96/5983 useless extension candidates. Maximal degree in co-relation 15328. Up to 1110 conditions per place. [2024-11-08 17:44:36,774 INFO L140 encePairwiseOnDemand]: 67/76 looper letters, 144 selfloop transitions, 21 changer transitions 0/188 dead transitions. [2024-11-08 17:44:36,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 188 transitions, 1161 flow [2024-11-08 17:44:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 17:44:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-08 17:44:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 791 transitions. [2024-11-08 17:44:36,783 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5203947368421052 [2024-11-08 17:44:36,783 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 361 flow. Second operand 20 states and 791 transitions. [2024-11-08 17:44:36,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 188 transitions, 1161 flow [2024-11-08 17:44:36,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 188 transitions, 1151 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:44:36,798 INFO L231 Difference]: Finished difference. Result has 111 places, 81 transitions, 476 flow [2024-11-08 17:44:36,799 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=476, PETRI_PLACES=111, PETRI_TRANSITIONS=81} [2024-11-08 17:44:36,800 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 43 predicate places. [2024-11-08 17:44:36,800 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 81 transitions, 476 flow [2024-11-08 17:44:36,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 35.148148148148145) internal successors, (949), 27 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:36,801 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:36,801 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:36,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 17:44:37,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 17:44:37,002 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:37,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:37,003 INFO L85 PathProgramCache]: Analyzing trace with hash -436390118, now seen corresponding path program 1 times [2024-11-08 17:44:37,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:37,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850085928] [2024-11-08 17:44:37,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:37,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:44:37,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:37,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850085928] [2024-11-08 17:44:37,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850085928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:44:37,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:44:37,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:44:37,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035374930] [2024-11-08 17:44:37,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:37,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:44:37,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:37,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:44:37,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:44:37,089 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 76 [2024-11-08 17:44:37,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 81 transitions, 476 flow. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:37,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:37,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 76 [2024-11-08 17:44:37,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:38,341 INFO L124 PetriNetUnfolderBase]: 3621/7739 cut-off events. [2024-11-08 17:44:38,341 INFO L125 PetriNetUnfolderBase]: For 9614/9614 co-relation queries the response was YES. [2024-11-08 17:44:38,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19413 conditions, 7739 events. 3621/7739 cut-off events. For 9614/9614 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 59766 event pairs, 1979 based on Foata normal form. 198/7576 useless extension candidates. Maximal degree in co-relation 19241. Up to 3795 conditions per place. [2024-11-08 17:44:38,402 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 78 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2024-11-08 17:44:38,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 114 transitions, 859 flow [2024-11-08 17:44:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:44:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:44:38,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 236 transitions. [2024-11-08 17:44:38,404 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7763157894736842 [2024-11-08 17:44:38,404 INFO L175 Difference]: Start difference. First operand has 111 places, 81 transitions, 476 flow. Second operand 4 states and 236 transitions. [2024-11-08 17:44:38,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 114 transitions, 859 flow [2024-11-08 17:44:38,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 114 transitions, 833 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-08 17:44:38,426 INFO L231 Difference]: Finished difference. Result has 109 places, 82 transitions, 469 flow [2024-11-08 17:44:38,426 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=469, PETRI_PLACES=109, PETRI_TRANSITIONS=82} [2024-11-08 17:44:38,427 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 41 predicate places. [2024-11-08 17:44:38,427 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 82 transitions, 469 flow [2024-11-08 17:44:38,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:38,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:38,428 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:38,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 17:44:38,428 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:38,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:38,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1079905823, now seen corresponding path program 1 times [2024-11-08 17:44:38,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:38,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233260750] [2024-11-08 17:44:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:38,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-08 17:44:38,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:38,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233260750] [2024-11-08 17:44:38,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233260750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:44:38,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811037491] [2024-11-08 17:44:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:38,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:44:38,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:44:38,920 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:44:38,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:44:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:39,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 17:44:39,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:44:39,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:44:39,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:44:39,210 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 17:44:39,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 17:44:39,228 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:44:39,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 17:44:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:39,957 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:44:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:44:40,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811037491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:44:40,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:44:40,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2024-11-08 17:44:40,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098067701] [2024-11-08 17:44:40,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:44:40,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 17:44:40,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:40,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 17:44:40,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-11-08 17:44:42,701 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 76 [2024-11-08 17:44:42,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 82 transitions, 469 flow. Second operand has 27 states, 27 states have (on average 38.25925925925926) internal successors, (1033), 27 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:42,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:42,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 76 [2024-11-08 17:44:42,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:45,341 INFO L124 PetriNetUnfolderBase]: 7220/15336 cut-off events. [2024-11-08 17:44:45,341 INFO L125 PetriNetUnfolderBase]: For 19038/19038 co-relation queries the response was YES. [2024-11-08 17:44:45,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39649 conditions, 15336 events. 7220/15336 cut-off events. For 19038/19038 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 126201 event pairs, 573 based on Foata normal form. 297/14763 useless extension candidates. Maximal degree in co-relation 39471. Up to 2801 conditions per place. [2024-11-08 17:44:45,443 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 141 selfloop transitions, 14 changer transitions 0/180 dead transitions. [2024-11-08 17:44:45,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 180 transitions, 1355 flow [2024-11-08 17:44:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 17:44:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 17:44:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 571 transitions. [2024-11-08 17:44:45,445 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5779352226720648 [2024-11-08 17:44:45,446 INFO L175 Difference]: Start difference. First operand has 109 places, 82 transitions, 469 flow. Second operand 13 states and 571 transitions. [2024-11-08 17:44:45,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 180 transitions, 1355 flow [2024-11-08 17:44:45,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 180 transitions, 1351 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:44:45,517 INFO L231 Difference]: Finished difference. Result has 124 places, 85 transitions, 542 flow [2024-11-08 17:44:45,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=542, PETRI_PLACES=124, PETRI_TRANSITIONS=85} [2024-11-08 17:44:45,518 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 56 predicate places. [2024-11-08 17:44:45,518 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 85 transitions, 542 flow [2024-11-08 17:44:45,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 38.25925925925926) internal successors, (1033), 27 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:45,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:45,519 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:45,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 17:44:45,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 17:44:45,720 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:45,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:45,720 INFO L85 PathProgramCache]: Analyzing trace with hash -705886019, now seen corresponding path program 1 times [2024-11-08 17:44:45,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:45,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569587594] [2024-11-08 17:44:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:45,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:44:45,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:45,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569587594] [2024-11-08 17:44:45,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569587594] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:44:45,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:44:45,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:44:45,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375570891] [2024-11-08 17:44:45,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:45,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:44:45,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:45,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:44:45,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:44:45,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2024-11-08 17:44:45,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 85 transitions, 542 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:45,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:45,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2024-11-08 17:44:45,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:49,198 INFO L124 PetriNetUnfolderBase]: 10612/21644 cut-off events. [2024-11-08 17:44:49,198 INFO L125 PetriNetUnfolderBase]: For 32052/32052 co-relation queries the response was YES. [2024-11-08 17:44:49,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58721 conditions, 21644 events. 10612/21644 cut-off events. For 32052/32052 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 181902 event pairs, 4859 based on Foata normal form. 0/20475 useless extension candidates. Maximal degree in co-relation 58546. Up to 14683 conditions per place. [2024-11-08 17:44:49,348 INFO L140 encePairwiseOnDemand]: 70/76 looper letters, 83 selfloop transitions, 4 changer transitions 0/118 dead transitions. [2024-11-08 17:44:49,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 118 transitions, 896 flow [2024-11-08 17:44:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:44:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:44:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 228 transitions. [2024-11-08 17:44:49,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-11-08 17:44:49,350 INFO L175 Difference]: Start difference. First operand has 124 places, 85 transitions, 542 flow. Second operand 4 states and 228 transitions. [2024-11-08 17:44:49,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 118 transitions, 896 flow [2024-11-08 17:44:49,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 118 transitions, 877 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-08 17:44:49,451 INFO L231 Difference]: Finished difference. Result has 122 places, 89 transitions, 593 flow [2024-11-08 17:44:49,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=593, PETRI_PLACES=122, PETRI_TRANSITIONS=89} [2024-11-08 17:44:49,452 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 54 predicate places. [2024-11-08 17:44:49,452 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 89 transitions, 593 flow [2024-11-08 17:44:49,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:49,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:49,453 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:49,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-08 17:44:49,453 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:49,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:49,454 INFO L85 PathProgramCache]: Analyzing trace with hash -958031807, now seen corresponding path program 2 times [2024-11-08 17:44:49,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:49,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331536965] [2024-11-08 17:44:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:49,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:44:49,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:49,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331536965] [2024-11-08 17:44:49,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331536965] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:44:49,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:44:49,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:44:49,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954328254] [2024-11-08 17:44:49,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:49,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:44:49,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:44:49,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:44:49,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2024-11-08 17:44:49,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 89 transitions, 593 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:49,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:49,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2024-11-08 17:44:49,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:52,984 INFO L124 PetriNetUnfolderBase]: 10620/21614 cut-off events. [2024-11-08 17:44:52,985 INFO L125 PetriNetUnfolderBase]: For 35516/35516 co-relation queries the response was YES. [2024-11-08 17:44:53,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60717 conditions, 21614 events. 10620/21614 cut-off events. For 35516/35516 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 180625 event pairs, 6903 based on Foata normal form. 8/21425 useless extension candidates. Maximal degree in co-relation 60547. Up to 11644 conditions per place. [2024-11-08 17:44:53,172 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 93 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2024-11-08 17:44:53,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 132 transitions, 1057 flow [2024-11-08 17:44:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:44:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:44:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 275 transitions. [2024-11-08 17:44:53,174 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7236842105263158 [2024-11-08 17:44:53,174 INFO L175 Difference]: Start difference. First operand has 122 places, 89 transitions, 593 flow. Second operand 5 states and 275 transitions. [2024-11-08 17:44:53,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 132 transitions, 1057 flow [2024-11-08 17:44:53,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 132 transitions, 1057 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 17:44:53,275 INFO L231 Difference]: Finished difference. Result has 128 places, 91 transitions, 633 flow [2024-11-08 17:44:53,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=633, PETRI_PLACES=128, PETRI_TRANSITIONS=91} [2024-11-08 17:44:53,276 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 60 predicate places. [2024-11-08 17:44:53,277 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 91 transitions, 633 flow [2024-11-08 17:44:53,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:53,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:53,277 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:53,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-08 17:44:53,278 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:53,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:53,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1498850368, now seen corresponding path program 1 times [2024-11-08 17:44:53,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:53,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194826306] [2024-11-08 17:44:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:53,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:44:53,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:53,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194826306] [2024-11-08 17:44:53,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194826306] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:44:53,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:44:53,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:44:53,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314815614] [2024-11-08 17:44:53,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:53,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:44:53,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:53,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:44:53,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:44:53,560 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2024-11-08 17:44:53,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 91 transitions, 633 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:53,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:53,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2024-11-08 17:44:53,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:44:56,964 INFO L124 PetriNetUnfolderBase]: 10594/21715 cut-off events. [2024-11-08 17:44:56,964 INFO L125 PetriNetUnfolderBase]: For 42331/42331 co-relation queries the response was YES. [2024-11-08 17:44:57,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62327 conditions, 21715 events. 10594/21715 cut-off events. For 42331/42331 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 182851 event pairs, 7240 based on Foata normal form. 188/21698 useless extension candidates. Maximal degree in co-relation 62153. Up to 13496 conditions per place. [2024-11-08 17:44:57,118 INFO L140 encePairwiseOnDemand]: 70/76 looper letters, 100 selfloop transitions, 5 changer transitions 0/137 dead transitions. [2024-11-08 17:44:57,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 137 transitions, 1139 flow [2024-11-08 17:44:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:44:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:44:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 239 transitions. [2024-11-08 17:44:57,119 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7861842105263158 [2024-11-08 17:44:57,119 INFO L175 Difference]: Start difference. First operand has 128 places, 91 transitions, 633 flow. Second operand 4 states and 239 transitions. [2024-11-08 17:44:57,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 137 transitions, 1139 flow [2024-11-08 17:44:57,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 137 transitions, 1111 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-08 17:44:57,203 INFO L231 Difference]: Finished difference. Result has 130 places, 92 transitions, 652 flow [2024-11-08 17:44:57,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=652, PETRI_PLACES=130, PETRI_TRANSITIONS=92} [2024-11-08 17:44:57,204 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 62 predicate places. [2024-11-08 17:44:57,204 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 92 transitions, 652 flow [2024-11-08 17:44:57,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:57,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:44:57,205 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:44:57,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-08 17:44:57,205 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:44:57,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:44:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash -806963195, now seen corresponding path program 3 times [2024-11-08 17:44:57,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:44:57,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083689173] [2024-11-08 17:44:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:44:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:44:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:44:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:44:57,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:44:57,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083689173] [2024-11-08 17:44:57,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083689173] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:44:57,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:44:57,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:44:57,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039960954] [2024-11-08 17:44:57,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:44:57,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:44:57,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:44:57,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:44:57,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:44:57,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2024-11-08 17:44:57,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 92 transitions, 652 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:44:57,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:44:57,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2024-11-08 17:44:57,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:45:00,798 INFO L124 PetriNetUnfolderBase]: 10590/21636 cut-off events. [2024-11-08 17:45:00,799 INFO L125 PetriNetUnfolderBase]: For 42409/42411 co-relation queries the response was YES. [2024-11-08 17:45:00,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61808 conditions, 21636 events. 10590/21636 cut-off events. For 42409/42411 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 180937 event pairs, 6969 based on Foata normal form. 196/21591 useless extension candidates. Maximal degree in co-relation 61633. Up to 12124 conditions per place. [2024-11-08 17:45:00,970 INFO L140 encePairwiseOnDemand]: 70/76 looper letters, 90 selfloop transitions, 8 changer transitions 2/131 dead transitions. [2024-11-08 17:45:00,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 131 transitions, 1111 flow [2024-11-08 17:45:00,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:45:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:45:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 233 transitions. [2024-11-08 17:45:00,972 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7664473684210527 [2024-11-08 17:45:00,972 INFO L175 Difference]: Start difference. First operand has 130 places, 92 transitions, 652 flow. Second operand 4 states and 233 transitions. [2024-11-08 17:45:00,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 131 transitions, 1111 flow [2024-11-08 17:45:01,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 131 transitions, 1098 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-08 17:45:01,059 INFO L231 Difference]: Finished difference. Result has 133 places, 92 transitions, 679 flow [2024-11-08 17:45:01,059 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=679, PETRI_PLACES=133, PETRI_TRANSITIONS=92} [2024-11-08 17:45:01,060 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 65 predicate places. [2024-11-08 17:45:01,060 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 92 transitions, 679 flow [2024-11-08 17:45:01,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:45:01,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:45:01,060 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:45:01,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-08 17:45:01,061 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:45:01,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:45:01,061 INFO L85 PathProgramCache]: Analyzing trace with hash 529780836, now seen corresponding path program 2 times [2024-11-08 17:45:01,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:45:01,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327356419] [2024-11-08 17:45:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:45:01,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:45:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:45:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:45:01,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:45:01,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327356419] [2024-11-08 17:45:01,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327356419] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:45:01,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:45:01,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:45:01,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230312640] [2024-11-08 17:45:01,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:45:01,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:45:01,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:45:01,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:45:01,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:45:01,209 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2024-11-08 17:45:01,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 92 transitions, 679 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:45:01,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:45:01,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2024-11-08 17:45:01,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:45:05,519 INFO L124 PetriNetUnfolderBase]: 11391/23833 cut-off events. [2024-11-08 17:45:05,519 INFO L125 PetriNetUnfolderBase]: For 48019/48019 co-relation queries the response was YES. [2024-11-08 17:45:05,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68876 conditions, 23833 events. 11391/23833 cut-off events. For 48019/48019 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 207158 event pairs, 5919 based on Foata normal form. 84/23725 useless extension candidates. Maximal degree in co-relation 68700. Up to 15862 conditions per place. [2024-11-08 17:45:06,067 INFO L140 encePairwiseOnDemand]: 71/76 looper letters, 82 selfloop transitions, 6 changer transitions 3/122 dead transitions. [2024-11-08 17:45:06,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 122 transitions, 1024 flow [2024-11-08 17:45:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:45:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:45:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 228 transitions. [2024-11-08 17:45:06,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-11-08 17:45:06,069 INFO L175 Difference]: Start difference. First operand has 133 places, 92 transitions, 679 flow. Second operand 4 states and 228 transitions. [2024-11-08 17:45:06,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 122 transitions, 1024 flow [2024-11-08 17:45:06,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 122 transitions, 1008 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-08 17:45:06,153 INFO L231 Difference]: Finished difference. Result has 134 places, 93 transitions, 701 flow [2024-11-08 17:45:06,153 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=701, PETRI_PLACES=134, PETRI_TRANSITIONS=93} [2024-11-08 17:45:06,154 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 66 predicate places. [2024-11-08 17:45:06,154 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 93 transitions, 701 flow [2024-11-08 17:45:06,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:45:06,155 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:45:06,155 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:45:06,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-08 17:45:06,155 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:45:06,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:45:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1422961673, now seen corresponding path program 1 times [2024-11-08 17:45:06,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:45:06,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325167631] [2024-11-08 17:45:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:45:06,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:45:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:45:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:45:06,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:45:06,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325167631] [2024-11-08 17:45:06,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325167631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:45:06,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031530244] [2024-11-08 17:45:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:45:06,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:45:06,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:45:06,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:45:06,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:45:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:45:07,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 17:45:07,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:45:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:45:07,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:45:07,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-08 17:45:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:45:07,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031530244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:45:07,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:45:07,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-11-08 17:45:07,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417220738] [2024-11-08 17:45:07,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:45:07,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 17:45:07,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:45:07,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 17:45:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 17:45:10,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 76 [2024-11-08 17:45:10,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 93 transitions, 701 flow. Second operand has 33 states, 33 states have (on average 45.21212121212121) internal successors, (1492), 33 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:45:10,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:45:10,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 76 [2024-11-08 17:45:10,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:45:15,150 INFO L124 PetriNetUnfolderBase]: 11448/24106 cut-off events. [2024-11-08 17:45:15,150 INFO L125 PetriNetUnfolderBase]: For 50890/50891 co-relation queries the response was YES. [2024-11-08 17:45:15,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69481 conditions, 24106 events. 11448/24106 cut-off events. For 50890/50891 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 210342 event pairs, 1932 based on Foata normal form. 312/24330 useless extension candidates. Maximal degree in co-relation 69305. Up to 4625 conditions per place. [2024-11-08 17:45:15,337 INFO L140 encePairwiseOnDemand]: 67/76 looper letters, 173 selfloop transitions, 22 changer transitions 0/229 dead transitions. [2024-11-08 17:45:15,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 229 transitions, 1951 flow [2024-11-08 17:45:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 17:45:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 17:45:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 703 transitions. [2024-11-08 17:45:15,339 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7115384615384616 [2024-11-08 17:45:15,339 INFO L175 Difference]: Start difference. First operand has 134 places, 93 transitions, 701 flow. Second operand 13 states and 703 transitions. [2024-11-08 17:45:15,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 229 transitions, 1951 flow [2024-11-08 17:45:15,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 229 transitions, 1939 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-08 17:45:15,394 INFO L231 Difference]: Finished difference. Result has 146 places, 95 transitions, 775 flow [2024-11-08 17:45:15,394 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=775, PETRI_PLACES=146, PETRI_TRANSITIONS=95} [2024-11-08 17:45:15,395 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 78 predicate places. [2024-11-08 17:45:15,395 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 95 transitions, 775 flow [2024-11-08 17:45:15,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 45.21212121212121) internal successors, (1492), 33 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:45:15,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:45:15,395 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:45:15,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 17:45:15,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:45:15,596 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:45:15,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:45:15,596 INFO L85 PathProgramCache]: Analyzing trace with hash 717593963, now seen corresponding path program 1 times [2024-11-08 17:45:15,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:45:15,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997992157] [2024-11-08 17:45:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:45:15,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:45:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:45:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:45:16,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:45:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997992157] [2024-11-08 17:45:16,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997992157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:45:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278550248] [2024-11-08 17:45:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:45:16,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:45:16,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:45:16,234 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:45:16,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 17:45:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:45:16,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 17:45:16,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:45:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:45:16,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:45:17,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-08 17:45:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 17:45:17,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278550248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:45:17,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:45:17,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-11-08 17:45:17,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131783965] [2024-11-08 17:45:17,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:45:17,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 17:45:17,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:45:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 17:45:17,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 17:45:19,780 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2024-11-08 17:45:19,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 95 transitions, 775 flow. Second operand has 33 states, 33 states have (on average 44.57575757575758) internal successors, (1471), 33 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:45:19,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:45:19,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2024-11-08 17:45:19,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:45:26,013 INFO L124 PetriNetUnfolderBase]: 15704/31603 cut-off events. [2024-11-08 17:45:26,014 INFO L125 PetriNetUnfolderBase]: For 74797/74798 co-relation queries the response was YES. [2024-11-08 17:45:26,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92286 conditions, 31603 events. 15704/31603 cut-off events. For 74797/74798 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 271514 event pairs, 1800 based on Foata normal form. 423/31364 useless extension candidates. Maximal degree in co-relation 92096. Up to 6605 conditions per place. [2024-11-08 17:45:26,269 INFO L140 encePairwiseOnDemand]: 67/76 looper letters, 174 selfloop transitions, 22 changer transitions 0/230 dead transitions. [2024-11-08 17:45:26,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 230 transitions, 2185 flow [2024-11-08 17:45:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 17:45:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 17:45:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 685 transitions. [2024-11-08 17:45:26,271 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6933198380566802 [2024-11-08 17:45:26,271 INFO L175 Difference]: Start difference. First operand has 146 places, 95 transitions, 775 flow. Second operand 13 states and 685 transitions. [2024-11-08 17:45:26,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 230 transitions, 2185 flow [2024-11-08 17:45:26,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 230 transitions, 2112 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-08 17:45:26,371 INFO L231 Difference]: Finished difference. Result has 153 places, 97 transitions, 828 flow [2024-11-08 17:45:26,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=828, PETRI_PLACES=153, PETRI_TRANSITIONS=97} [2024-11-08 17:45:26,372 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 85 predicate places. [2024-11-08 17:45:26,372 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 97 transitions, 828 flow [2024-11-08 17:45:26,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 44.57575757575758) internal successors, (1471), 33 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:45:26,372 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:45:26,373 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1, 1] [2024-11-08 17:45:26,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 17:45:26,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820eecd-680f-4fc2-85b6-f36ae2ad10c0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:45:26,573 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:45:26,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:45:26,574 INFO L85 PathProgramCache]: Analyzing trace with hash -557784409, now seen corresponding path program 1 times [2024-11-08 17:45:26,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:45:26,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059335766] [2024-11-08 17:45:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:45:26,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:45:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:45:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:45:27,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:45:27,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059335766] [2024-11-08 17:45:27,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059335766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:45:27,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:45:27,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-08 17:45:27,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956008643] [2024-11-08 17:45:27,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:45:27,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:45:27,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:45:27,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:45:27,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:45:28,218 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2024-11-08 17:45:28,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 97 transitions, 828 flow. Second operand has 12 states, 12 states have (on average 44.333333333333336) internal successors, (532), 12 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:45:28,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:45:28,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2024-11-08 17:45:28,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:45:35,686 INFO L124 PetriNetUnfolderBase]: 17940/36300 cut-off events. [2024-11-08 17:45:35,686 INFO L125 PetriNetUnfolderBase]: For 101583/101790 co-relation queries the response was YES. [2024-11-08 17:45:35,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110908 conditions, 36300 events. 17940/36300 cut-off events. For 101583/101790 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 310799 event pairs, 12005 based on Foata normal form. 9/36251 useless extension candidates. Maximal degree in co-relation 110714. Up to 21872 conditions per place. [2024-11-08 17:45:36,003 INFO L140 encePairwiseOnDemand]: 62/76 looper letters, 210 selfloop transitions, 25 changer transitions 0/262 dead transitions. [2024-11-08 17:45:36,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 262 transitions, 2548 flow [2024-11-08 17:45:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 17:45:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 17:45:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 775 transitions. [2024-11-08 17:45:36,006 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6798245614035088 [2024-11-08 17:45:36,006 INFO L175 Difference]: Start difference. First operand has 153 places, 97 transitions, 828 flow. Second operand 15 states and 775 transitions. [2024-11-08 17:45:36,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 262 transitions, 2548 flow [2024-11-08 17:45:36,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 262 transitions, 2471 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-08 17:45:36,232 INFO L231 Difference]: Finished difference. Result has 168 places, 114 transitions, 1049 flow [2024-11-08 17:45:36,232 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1049, PETRI_PLACES=168, PETRI_TRANSITIONS=114} [2024-11-08 17:45:36,232 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 100 predicate places. [2024-11-08 17:45:36,233 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 114 transitions, 1049 flow [2024-11-08 17:45:36,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 44.333333333333336) internal successors, (532), 12 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:45:36,233 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:45:36,233 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1, 1] [2024-11-08 17:45:36,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-08 17:45:36,234 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:45:36,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:45:36,234 INFO L85 PathProgramCache]: Analyzing trace with hash 572978901, now seen corresponding path program 2 times [2024-11-08 17:45:36,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:45:36,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711707355] [2024-11-08 17:45:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:45:36,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:45:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:45:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 17:45:36,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:45:36,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711707355] [2024-11-08 17:45:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711707355] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:45:36,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:45:36,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-08 17:45:36,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140278970] [2024-11-08 17:45:36,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:45:36,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:45:36,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:45:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:45:36,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:45:37,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 76 [2024-11-08 17:45:37,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 114 transitions, 1049 flow. Second operand has 12 states, 12 states have (on average 43.333333333333336) internal successors, (520), 12 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:45:37,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:45:37,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 76 [2024-11-08 17:45:37,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand