./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.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_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/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_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/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_a5fab3aa-10af-488a-a32e-dcef963b50ab/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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 19:17:04,782 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 19:17:04,895 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 19:17:04,903 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 19:17:04,905 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 19:17:04,941 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 19:17:04,943 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 19:17:04,944 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 19:17:04,945 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 19:17:04,946 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 19:17:04,947 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 19:17:04,947 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 19:17:04,948 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 19:17:04,948 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 19:17:04,949 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 19:17:04,949 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 19:17:04,950 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 19:17:04,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 19:17:04,950 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 19:17:04,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 19:17:04,951 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 19:17:04,956 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 19:17:04,956 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 19:17:04,956 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 19:17:04,957 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 19:17:04,957 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 19:17:04,957 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 19:17:04,958 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 19:17:04,958 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 19:17:04,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 19:17:04,959 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 19:17:04,959 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 19:17:04,959 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 19:17:04,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 19:17:04,962 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 19:17:04,962 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 19:17:04,963 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 19:17:04,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 19:17:04,963 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 19:17:04,963 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 19:17:04,964 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 19:17:04,966 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 19:17:04,967 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_a5fab3aa-10af-488a-a32e-dcef963b50ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2024-11-08 19:17:05,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 19:17:05,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 19:17:05,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 19:17:05,289 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 19:17:05,289 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 19:17:05,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c Unable to find full path for "g++" [2024-11-08 19:17:07,361 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 19:17:07,589 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 19:17:07,589 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-11-08 19:17:07,602 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/data/efed3cdb1/770dba44103a437ba48c5d33d6acbc6d/FLAGba29f3925 [2024-11-08 19:17:07,955 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/data/efed3cdb1/770dba44103a437ba48c5d33d6acbc6d [2024-11-08 19:17:07,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 19:17:07,971 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 19:17:07,973 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 19:17:07,976 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 19:17:07,991 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 19:17:07,995 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 07:17:07" (1/1) ... [2024-11-08 19:17:07,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b38253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:07, skipping insertion in model container [2024-11-08 19:17:07,997 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 07:17:07" (1/1) ... [2024-11-08 19:17:08,046 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 19:17:08,291 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 19:17:08,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 19:17:08,308 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 19:17:08,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 19:17:08,406 INFO L204 MainTranslator]: Completed translation [2024-11-08 19:17:08,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08 WrapperNode [2024-11-08 19:17:08,407 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 19:17:08,413 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 19:17:08,413 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 19:17:08,413 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 19:17:08,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (1/1) ... [2024-11-08 19:17:08,441 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (1/1) ... [2024-11-08 19:17:08,497 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 189 [2024-11-08 19:17:08,498 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 19:17:08,499 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 19:17:08,501 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 19:17:08,502 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 19:17:08,518 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (1/1) ... [2024-11-08 19:17:08,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (1/1) ... [2024-11-08 19:17:08,524 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (1/1) ... [2024-11-08 19:17:08,545 INFO L175 MemorySlicer]: Split 14 memory accesses to 2 slices as follows [2, 12]. 86 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 19:17:08,546 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (1/1) ... [2024-11-08 19:17:08,546 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (1/1) ... [2024-11-08 19:17:08,556 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (1/1) ... [2024-11-08 19:17:08,563 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (1/1) ... [2024-11-08 19:17:08,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (1/1) ... [2024-11-08 19:17:08,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (1/1) ... [2024-11-08 19:17:08,578 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 19:17:08,579 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 19:17:08,580 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 19:17:08,580 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 19:17:08,581 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (1/1) ... [2024-11-08 19:17:08,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 19:17:08,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:17:08,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 19:17:08,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 19:17:08,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 19:17:08,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 19:17:08,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 19:17:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 19:17:08,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 19:17:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 19:17:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 19:17:08,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 19:17:08,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 19:17:08,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 19:17:08,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 19:17:08,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 19:17:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 19:17:08,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 19:17:08,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 19:17:08,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 19:17:08,666 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 19:17:08,829 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 19:17:08,834 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 19:17:09,504 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 19:17:09,505 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 19:17:10,104 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 19:17:10,104 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 19:17:10,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 07:17:10 BoogieIcfgContainer [2024-11-08 19:17:10,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 19:17:10,107 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 19:17:10,107 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 19:17:10,111 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 19:17:10,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 07:17:07" (1/3) ... [2024-11-08 19:17:10,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73afc69c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 07:17:10, skipping insertion in model container [2024-11-08 19:17:10,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:17:08" (2/3) ... [2024-11-08 19:17:10,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73afc69c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 07:17:10, skipping insertion in model container [2024-11-08 19:17:10,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 07:17:10" (3/3) ... [2024-11-08 19:17:10,114 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-11-08 19:17:10,134 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 19:17:10,134 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2024-11-08 19:17:10,134 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 19:17:10,237 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 19:17:10,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 146 flow [2024-11-08 19:17:10,339 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-11-08 19:17:10,340 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 19:17:10,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 8/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 178 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-11-08 19:17:10,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 146 flow [2024-11-08 19:17:10,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 138 flow [2024-11-08 19:17:10,366 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 19:17:10,375 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;@2bc0eae7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 19:17:10,376 INFO L334 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2024-11-08 19:17:10,386 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 19:17:10,387 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 19:17:10,387 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 19:17:10,388 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:10,388 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 19:17:10,389 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:10,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:10,397 INFO L85 PathProgramCache]: Analyzing trace with hash 20773860, now seen corresponding path program 1 times [2024-11-08 19:17:10,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:10,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441764563] [2024-11-08 19:17:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:10,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:10,746 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 19:17:10,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:10,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441764563] [2024-11-08 19:17:10,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441764563] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:10,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:10,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 19:17:10,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635624923] [2024-11-08 19:17:10,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:10,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 19:17:10,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:10,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 19:17:10,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 19:17:10,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 66 [2024-11-08 19:17:10,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:17:10,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:10,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 66 [2024-11-08 19:17:10,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:11,152 INFO L124 PetriNetUnfolderBase]: 238/455 cut-off events. [2024-11-08 19:17:11,152 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-08 19:17:11,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 455 events. 238/455 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 2493 event pairs, 182 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 788. Up to 373 conditions per place. [2024-11-08 19:17:11,160 INFO L140 encePairwiseOnDemand]: 49/66 looper letters, 28 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-08 19:17:11,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 166 flow [2024-11-08 19:17:11,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 19:17:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 19:17:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-11-08 19:17:11,180 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-11-08 19:17:11,183 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 138 flow. Second operand 3 states and 105 transitions. [2024-11-08 19:17:11,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 166 flow [2024-11-08 19:17:11,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 19:17:11,194 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 102 flow [2024-11-08 19:17:11,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2024-11-08 19:17:11,205 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -18 predicate places. [2024-11-08 19:17:11,206 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 102 flow [2024-11-08 19:17:11,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:17:11,206 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:11,206 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 19:17:11,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 19:17:11,207 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:11,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash 20773861, now seen corresponding path program 1 times [2024-11-08 19:17:11,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:11,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624188755] [2024-11-08 19:17:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:11,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:11,715 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 19:17:11,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:11,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624188755] [2024-11-08 19:17:11,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624188755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:11,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:11,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 19:17:11,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140611802] [2024-11-08 19:17:11,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:11,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 19:17:11,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:11,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 19:17:11,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 19:17:11,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:17:11,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 19:17:11,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:11,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:17:11,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:12,034 INFO L124 PetriNetUnfolderBase]: 240/462 cut-off events. [2024-11-08 19:17:12,034 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-08 19:17:12,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 462 events. 240/462 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 2525 event pairs, 182 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 820. Up to 389 conditions per place. [2024-11-08 19:17:12,039 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 40 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-11-08 19:17:12,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 206 flow [2024-11-08 19:17:12,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 19:17:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 19:17:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-11-08 19:17:12,041 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-08 19:17:12,042 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 102 flow. Second operand 4 states and 102 transitions. [2024-11-08 19:17:12,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 206 flow [2024-11-08 19:17:12,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 19:17:12,045 INFO L231 Difference]: Finished difference. Result has 47 places, 51 transitions, 130 flow [2024-11-08 19:17:12,045 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=47, PETRI_TRANSITIONS=51} [2024-11-08 19:17:12,046 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -15 predicate places. [2024-11-08 19:17:12,046 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 51 transitions, 130 flow [2024-11-08 19:17:12,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 19:17:12,047 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:12,047 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 19:17:12,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 19:17:12,048 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:12,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:12,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1512015412, now seen corresponding path program 1 times [2024-11-08 19:17:12,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:12,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276002246] [2024-11-08 19:17:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:12,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:12,408 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 19:17:12,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:12,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276002246] [2024-11-08 19:17:12,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276002246] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:12,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:12,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 19:17:12,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23019741] [2024-11-08 19:17:12,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:12,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 19:17:12,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:12,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 19:17:12,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 19:17:12,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:17:12,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 51 transitions, 130 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 19:17:12,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:12,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:17:12,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:12,757 INFO L124 PetriNetUnfolderBase]: 242/469 cut-off events. [2024-11-08 19:17:12,758 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-08 19:17:12,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 469 events. 242/469 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 2568 event pairs, 182 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 857. Up to 388 conditions per place. [2024-11-08 19:17:12,762 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 43 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-11-08 19:17:12,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 254 flow [2024-11-08 19:17:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 19:17:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 19:17:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-11-08 19:17:12,764 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37272727272727274 [2024-11-08 19:17:12,765 INFO L175 Difference]: Start difference. First operand has 47 places, 51 transitions, 130 flow. Second operand 5 states and 123 transitions. [2024-11-08 19:17:12,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 254 flow [2024-11-08 19:17:12,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 19:17:12,767 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 176 flow [2024-11-08 19:17:12,768 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2024-11-08 19:17:12,768 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -9 predicate places. [2024-11-08 19:17:12,769 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 176 flow [2024-11-08 19:17:12,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 19:17:12,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:12,769 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 19:17:12,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 19:17:12,770 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:12,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:12,771 INFO L85 PathProgramCache]: Analyzing trace with hash 399497154, now seen corresponding path program 1 times [2024-11-08 19:17:12,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:12,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315437602] [2024-11-08 19:17:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:12,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:13,433 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 19:17:13,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:13,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315437602] [2024-11-08 19:17:13,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315437602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:17:13,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116467394] [2024-11-08 19:17:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:13,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:13,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:17:13,438 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:17:13,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 19:17:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:13,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 19:17:13,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:17:13,650 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 19:17:13,873 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 19:17:13,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:17:14,063 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 19:17:14,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116467394] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:17:14,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:17:14,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 19:17:14,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071513149] [2024-11-08 19:17:14,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:17:14,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 19:17:14,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:14,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 19:17:14,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-08 19:17:14,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:17:14,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 176 flow. Second operand has 12 states, 12 states have (on average 15.75) internal successors, (189), 12 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:17:14,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:14,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:17:14,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:14,725 INFO L124 PetriNetUnfolderBase]: 242/469 cut-off events. [2024-11-08 19:17:14,725 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-08 19:17:14,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 469 events. 242/469 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 2536 event pairs, 182 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 870. Up to 386 conditions per place. [2024-11-08 19:17:14,728 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 35 selfloop transitions, 14 changer transitions 0/58 dead transitions. [2024-11-08 19:17:14,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 58 transitions, 283 flow [2024-11-08 19:17:14,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 19:17:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 19:17:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-11-08 19:17:14,731 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3116883116883117 [2024-11-08 19:17:14,731 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 176 flow. Second operand 7 states and 144 transitions. [2024-11-08 19:17:14,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 58 transitions, 283 flow [2024-11-08 19:17:14,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 274 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-08 19:17:14,734 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 198 flow [2024-11-08 19:17:14,734 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-11-08 19:17:14,735 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-11-08 19:17:14,735 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 198 flow [2024-11-08 19:17:14,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.75) internal successors, (189), 12 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:17:14,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:14,735 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-08 19:17:14,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 19:17:14,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:14,940 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:14,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:14,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1166567672, now seen corresponding path program 1 times [2024-11-08 19:17:14,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:14,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604017256] [2024-11-08 19:17:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:14,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:15,286 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 19:17:15,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:15,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604017256] [2024-11-08 19:17:15,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604017256] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:17:15,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406565306] [2024-11-08 19:17:15,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:15,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:15,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:17:15,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:17:15,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 19:17:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:15,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 19:17:15,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:17:15,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 19:17:15,759 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 19:17:15,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:17:15,948 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 19:17:15,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406565306] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:17:15,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:17:15,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 19:17:15,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128401875] [2024-11-08 19:17:15,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:17:15,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 19:17:15,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 19:17:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-08 19:17:16,141 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:17:16,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 198 flow. Second operand has 14 states, 14 states have (on average 15.785714285714286) internal successors, (221), 14 states have internal predecessors, (221), 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 19:17:16,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:16,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:17:16,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:16,833 INFO L124 PetriNetUnfolderBase]: 244/479 cut-off events. [2024-11-08 19:17:16,833 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-08 19:17:16,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 479 events. 244/479 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 2621 event pairs, 182 based on Foata normal form. 1/300 useless extension candidates. Maximal degree in co-relation 894. Up to 376 conditions per place. [2024-11-08 19:17:16,837 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 40 selfloop transitions, 22 changer transitions 0/71 dead transitions. [2024-11-08 19:17:16,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 383 flow [2024-11-08 19:17:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 19:17:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 19:17:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-11-08 19:17:16,841 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32323232323232326 [2024-11-08 19:17:16,842 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 198 flow. Second operand 9 states and 192 transitions. [2024-11-08 19:17:16,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 383 flow [2024-11-08 19:17:16,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 337 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-08 19:17:16,848 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 245 flow [2024-11-08 19:17:16,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=245, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2024-11-08 19:17:16,849 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2024-11-08 19:17:16,849 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 245 flow [2024-11-08 19:17:16,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.785714285714286) internal successors, (221), 14 states have internal predecessors, (221), 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 19:17:16,851 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:16,851 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:16,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 19:17:17,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:17,055 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:17,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:17,055 INFO L85 PathProgramCache]: Analyzing trace with hash -761497252, now seen corresponding path program 1 times [2024-11-08 19:17:17,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:17,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283058545] [2024-11-08 19:17:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:17,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:17,137 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 19:17:17,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:17,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283058545] [2024-11-08 19:17:17,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283058545] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:17,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:17,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 19:17:17,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275040209] [2024-11-08 19:17:17,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:17,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 19:17:17,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:17,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 19:17:17,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 19:17:17,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 66 [2024-11-08 19:17:17,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 19:17:17,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:17,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 66 [2024-11-08 19:17:17,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:17,284 INFO L124 PetriNetUnfolderBase]: 194/390 cut-off events. [2024-11-08 19:17:17,285 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-08 19:17:17,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 390 events. 194/390 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 1983 event pairs, 138 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 697. Up to 295 conditions per place. [2024-11-08 19:17:17,288 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 34 selfloop transitions, 6 changer transitions 0/59 dead transitions. [2024-11-08 19:17:17,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 321 flow [2024-11-08 19:17:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 19:17:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 19:17:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-11-08 19:17:17,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-08 19:17:17,291 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 245 flow. Second operand 4 states and 110 transitions. [2024-11-08 19:17:17,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 321 flow [2024-11-08 19:17:17,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 271 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-08 19:17:17,299 INFO L231 Difference]: Finished difference. Result has 53 places, 59 transitions, 203 flow [2024-11-08 19:17:17,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=203, PETRI_PLACES=53, PETRI_TRANSITIONS=59} [2024-11-08 19:17:17,300 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -9 predicate places. [2024-11-08 19:17:17,300 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 59 transitions, 203 flow [2024-11-08 19:17:17,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 19:17:17,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:17,301 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:17,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 19:17:17,301 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:17,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:17,301 INFO L85 PathProgramCache]: Analyzing trace with hash -761497251, now seen corresponding path program 1 times [2024-11-08 19:17:17,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:17,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328544293] [2024-11-08 19:17:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:17,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:17,402 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 19:17:17,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:17,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328544293] [2024-11-08 19:17:17,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328544293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:17,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:17,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 19:17:17,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999574227] [2024-11-08 19:17:17,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:17,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 19:17:17,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:17,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 19:17:17,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 19:17:17,437 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2024-11-08 19:17:17,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 59 transitions, 203 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 19:17:17,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:17,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2024-11-08 19:17:17,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:17,691 INFO L124 PetriNetUnfolderBase]: 258/541 cut-off events. [2024-11-08 19:17:17,691 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-08 19:17:17,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 541 events. 258/541 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2928 event pairs, 164 based on Foata normal form. 12/391 useless extension candidates. Maximal degree in co-relation 949. Up to 325 conditions per place. [2024-11-08 19:17:17,696 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 68 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-11-08 19:17:17,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 91 transitions, 456 flow [2024-11-08 19:17:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 19:17:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 19:17:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-11-08 19:17:17,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-11-08 19:17:17,698 INFO L175 Difference]: Start difference. First operand has 53 places, 59 transitions, 203 flow. Second operand 5 states and 156 transitions. [2024-11-08 19:17:17,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 91 transitions, 456 flow [2024-11-08 19:17:17,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 91 transitions, 444 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 19:17:17,703 INFO L231 Difference]: Finished difference. Result has 58 places, 65 transitions, 267 flow [2024-11-08 19:17:17,703 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=58, PETRI_TRANSITIONS=65} [2024-11-08 19:17:17,705 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2024-11-08 19:17:17,705 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 65 transitions, 267 flow [2024-11-08 19:17:17,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 19:17:17,706 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:17,706 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:17,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 19:17:17,706 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:17,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:17,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1386824619, now seen corresponding path program 1 times [2024-11-08 19:17:17,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:17,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425602785] [2024-11-08 19:17:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:17,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:17,828 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 19:17:17,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:17,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425602785] [2024-11-08 19:17:17,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425602785] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:17,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:17,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 19:17:17,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714255040] [2024-11-08 19:17:17,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:17,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 19:17:17,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 19:17:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 19:17:17,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2024-11-08 19:17:17,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 65 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 19:17:17,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:17,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2024-11-08 19:17:17,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:18,135 INFO L124 PetriNetUnfolderBase]: 353/776 cut-off events. [2024-11-08 19:17:18,135 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-11-08 19:17:18,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1612 conditions, 776 events. 353/776 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4542 event pairs, 229 based on Foata normal form. 36/607 useless extension candidates. Maximal degree in co-relation 1492. Up to 435 conditions per place. [2024-11-08 19:17:18,141 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 53 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-11-08 19:17:18,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 83 transitions, 453 flow [2024-11-08 19:17:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 19:17:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 19:17:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-11-08 19:17:18,143 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-11-08 19:17:18,143 INFO L175 Difference]: Start difference. First operand has 58 places, 65 transitions, 267 flow. Second operand 6 states and 164 transitions. [2024-11-08 19:17:18,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 83 transitions, 453 flow [2024-11-08 19:17:18,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 448 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-08 19:17:18,147 INFO L231 Difference]: Finished difference. Result has 64 places, 68 transitions, 332 flow [2024-11-08 19:17:18,147 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=332, PETRI_PLACES=64, PETRI_TRANSITIONS=68} [2024-11-08 19:17:18,149 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-11-08 19:17:18,150 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 68 transitions, 332 flow [2024-11-08 19:17:18,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 19:17:18,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:18,151 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:18,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 19:17:18,152 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:18,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash -752862342, now seen corresponding path program 1 times [2024-11-08 19:17:18,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:18,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140743007] [2024-11-08 19:17:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:17:18,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140743007] [2024-11-08 19:17:18,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140743007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:18,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:18,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 19:17:18,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578969667] [2024-11-08 19:17:18,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:18,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 19:17:18,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:18,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 19:17:18,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 19:17:18,350 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2024-11-08 19:17:18,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 68 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 19:17:18,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:18,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2024-11-08 19:17:18,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:18,566 INFO L124 PetriNetUnfolderBase]: 336/751 cut-off events. [2024-11-08 19:17:18,567 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2024-11-08 19:17:18,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670 conditions, 751 events. 336/751 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4381 event pairs, 238 based on Foata normal form. 6/583 useless extension candidates. Maximal degree in co-relation 1544. Up to 428 conditions per place. [2024-11-08 19:17:18,572 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 53 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2024-11-08 19:17:18,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 493 flow [2024-11-08 19:17:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 19:17:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 19:17:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-11-08 19:17:18,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4303030303030303 [2024-11-08 19:17:18,574 INFO L175 Difference]: Start difference. First operand has 64 places, 68 transitions, 332 flow. Second operand 5 states and 142 transitions. [2024-11-08 19:17:18,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 493 flow [2024-11-08 19:17:18,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 482 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 19:17:18,578 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 346 flow [2024-11-08 19:17:18,578 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-11-08 19:17:18,579 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2024-11-08 19:17:18,579 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 346 flow [2024-11-08 19:17:18,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 19:17:18,580 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:18,580 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:18,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 19:17:18,580 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:18,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:18,581 INFO L85 PathProgramCache]: Analyzing trace with hash -752862349, now seen corresponding path program 1 times [2024-11-08 19:17:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:18,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599003295] [2024-11-08 19:17:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:18,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:17:18,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:18,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599003295] [2024-11-08 19:17:18,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599003295] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:18,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:18,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 19:17:18,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388606975] [2024-11-08 19:17:18,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:18,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 19:17:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 19:17:18,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 19:17:18,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 66 [2024-11-08 19:17:18,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 346 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 19:17:18,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:18,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 66 [2024-11-08 19:17:18,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:18,837 INFO L124 PetriNetUnfolderBase]: 273/632 cut-off events. [2024-11-08 19:17:18,837 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2024-11-08 19:17:18,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 632 events. 273/632 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3512 event pairs, 185 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 1294. Up to 436 conditions per place. [2024-11-08 19:17:18,842 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 29 selfloop transitions, 13 changer transitions 0/65 dead transitions. [2024-11-08 19:17:18,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 65 transitions, 422 flow [2024-11-08 19:17:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 19:17:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 19:17:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-08 19:17:18,844 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-11-08 19:17:18,844 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 346 flow. Second operand 5 states and 128 transitions. [2024-11-08 19:17:18,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 65 transitions, 422 flow [2024-11-08 19:17:18,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 400 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 19:17:18,847 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 342 flow [2024-11-08 19:17:18,847 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=342, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-11-08 19:17:18,848 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-08 19:17:18,848 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 342 flow [2024-11-08 19:17:18,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 19:17:18,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:18,849 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:18,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 19:17:18,849 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:18,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:18,850 INFO L85 PathProgramCache]: Analyzing trace with hash -752862348, now seen corresponding path program 1 times [2024-11-08 19:17:18,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:18,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589314351] [2024-11-08 19:17:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:18,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:17:19,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:19,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589314351] [2024-11-08 19:17:19,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589314351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:17:19,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156615991] [2024-11-08 19:17:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:19,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:19,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:17:19,170 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:17:19,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 19:17:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:19,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 19:17:19,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:17:19,282 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 19:17:19,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 19:17:19,384 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 16 treesize of output 11 [2024-11-08 19:17:19,406 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 19:17:19,406 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 19:17:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:17:19,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:17:19,669 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 61 treesize of output 57 [2024-11-08 19:17:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:17:19,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156615991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:17:19,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:17:19,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 19:17:19,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533042307] [2024-11-08 19:17:19,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:17:19,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 19:17:19,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:19,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 19:17:19,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-08 19:17:20,334 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 66 [2024-11-08 19:17:20,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 342 flow. Second operand has 12 states, 12 states have (on average 22.083333333333332) internal successors, (265), 12 states have internal predecessors, (265), 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 19:17:20,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:20,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 66 [2024-11-08 19:17:20,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:21,186 INFO L124 PetriNetUnfolderBase]: 492/1077 cut-off events. [2024-11-08 19:17:21,186 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2024-11-08 19:17:21,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2398 conditions, 1077 events. 492/1077 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6126 event pairs, 200 based on Foata normal form. 40/926 useless extension candidates. Maximal degree in co-relation 2294. Up to 311 conditions per place. [2024-11-08 19:17:21,196 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 71 selfloop transitions, 22 changer transitions 3/119 dead transitions. [2024-11-08 19:17:21,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 119 transitions, 719 flow [2024-11-08 19:17:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 19:17:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 19:17:21,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 267 transitions. [2024-11-08 19:17:21,198 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-11-08 19:17:21,198 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 342 flow. Second operand 9 states and 267 transitions. [2024-11-08 19:17:21,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 119 transitions, 719 flow [2024-11-08 19:17:21,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 119 transitions, 697 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 19:17:21,204 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 434 flow [2024-11-08 19:17:21,204 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=434, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-11-08 19:17:21,205 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 13 predicate places. [2024-11-08 19:17:21,205 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 434 flow [2024-11-08 19:17:21,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.083333333333332) internal successors, (265), 12 states have internal predecessors, (265), 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 19:17:21,205 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:21,206 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:21,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 19:17:21,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:21,410 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:21,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:21,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1643389399, now seen corresponding path program 1 times [2024-11-08 19:17:21,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:21,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685474970] [2024-11-08 19:17:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:21,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:17:21,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:21,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685474970] [2024-11-08 19:17:21,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685474970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:17:21,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041628175] [2024-11-08 19:17:21,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:21,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:21,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:17:21,740 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:17:21,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 19:17:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:21,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 19:17:21,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:17:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:17:21,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:17:22,077 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 29 treesize of output 25 [2024-11-08 19:17:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:17:22,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041628175] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:17:22,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:17:22,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2024-11-08 19:17:22,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944470750] [2024-11-08 19:17:22,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:17:22,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 19:17:22,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:22,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 19:17:22,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-08 19:17:22,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 66 [2024-11-08 19:17:22,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 434 flow. Second operand has 13 states, 13 states have (on average 24.23076923076923) internal successors, (315), 13 states have internal predecessors, (315), 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 19:17:22,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:22,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 66 [2024-11-08 19:17:22,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:22,895 INFO L124 PetriNetUnfolderBase]: 488/1059 cut-off events. [2024-11-08 19:17:22,896 INFO L125 PetriNetUnfolderBase]: For 1631/1631 co-relation queries the response was YES. [2024-11-08 19:17:22,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2742 conditions, 1059 events. 488/1059 cut-off events. For 1631/1631 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5986 event pairs, 107 based on Foata normal form. 2/906 useless extension candidates. Maximal degree in co-relation 2631. Up to 235 conditions per place. [2024-11-08 19:17:22,903 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 63 selfloop transitions, 23 changer transitions 15/122 dead transitions. [2024-11-08 19:17:22,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 122 transitions, 827 flow [2024-11-08 19:17:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 19:17:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 19:17:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 261 transitions. [2024-11-08 19:17:22,905 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2024-11-08 19:17:22,905 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 434 flow. Second operand 8 states and 261 transitions. [2024-11-08 19:17:22,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 122 transitions, 827 flow [2024-11-08 19:17:22,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 803 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-08 19:17:22,912 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 521 flow [2024-11-08 19:17:22,912 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=521, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2024-11-08 19:17:22,912 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 22 predicate places. [2024-11-08 19:17:22,913 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 521 flow [2024-11-08 19:17:22,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 24.23076923076923) internal successors, (315), 13 states have internal predecessors, (315), 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 19:17:22,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:22,913 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:22,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 19:17:23,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 19:17:23,118 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:23,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:23,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1643389405, now seen corresponding path program 1 times [2024-11-08 19:17:23,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:23,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424275066] [2024-11-08 19:17:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:23,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:17:23,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:23,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424275066] [2024-11-08 19:17:23,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424275066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:23,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:23,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 19:17:23,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861805777] [2024-11-08 19:17:23,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:23,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 19:17:23,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 19:17:23,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 19:17:23,267 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2024-11-08 19:17:23,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 521 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 19:17:23,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:23,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2024-11-08 19:17:23,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:23,506 INFO L124 PetriNetUnfolderBase]: 432/944 cut-off events. [2024-11-08 19:17:23,507 INFO L125 PetriNetUnfolderBase]: For 2556/2556 co-relation queries the response was YES. [2024-11-08 19:17:23,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 944 events. 432/944 cut-off events. For 2556/2556 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5283 event pairs, 293 based on Foata normal form. 12/823 useless extension candidates. Maximal degree in co-relation 2665. Up to 624 conditions per place. [2024-11-08 19:17:23,515 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 49 selfloop transitions, 2 changer transitions 24/90 dead transitions. [2024-11-08 19:17:23,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 706 flow [2024-11-08 19:17:23,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 19:17:23,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 19:17:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-11-08 19:17:23,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-11-08 19:17:23,517 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 521 flow. Second operand 5 states and 144 transitions. [2024-11-08 19:17:23,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 706 flow [2024-11-08 19:17:23,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 90 transitions, 677 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-08 19:17:23,526 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 422 flow [2024-11-08 19:17:23,527 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2024-11-08 19:17:23,527 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2024-11-08 19:17:23,527 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 422 flow [2024-11-08 19:17:23,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 19:17:23,528 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:23,528 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:23,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 19:17:23,528 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:23,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:23,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1442520908, now seen corresponding path program 1 times [2024-11-08 19:17:23,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:23,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601643890] [2024-11-08 19:17:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:23,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:17:23,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:23,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601643890] [2024-11-08 19:17:23,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601643890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:17:23,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897860768] [2024-11-08 19:17:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:23,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:23,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:17:23,833 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:17:23,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 19:17:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:23,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 19:17:23,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:17:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:17:24,052 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 19:17:24,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897860768] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:24,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 19:17:24,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-08 19:17:24,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139399955] [2024-11-08 19:17:24,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:24,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 19:17:24,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:24,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 19:17:24,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-08 19:17:24,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2024-11-08 19:17:24,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 422 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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 19:17:24,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:24,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2024-11-08 19:17:24,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:24,327 INFO L124 PetriNetUnfolderBase]: 294/645 cut-off events. [2024-11-08 19:17:24,327 INFO L125 PetriNetUnfolderBase]: For 1952/1952 co-relation queries the response was YES. [2024-11-08 19:17:24,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 645 events. 294/645 cut-off events. For 1952/1952 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3261 event pairs, 190 based on Foata normal form. 56/600 useless extension candidates. Maximal degree in co-relation 1787. Up to 433 conditions per place. [2024-11-08 19:17:24,333 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 37 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-11-08 19:17:24,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 60 transitions, 460 flow [2024-11-08 19:17:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 19:17:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 19:17:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-08 19:17:24,335 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-08 19:17:24,335 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 422 flow. Second operand 5 states and 120 transitions. [2024-11-08 19:17:24,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 60 transitions, 460 flow [2024-11-08 19:17:24,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 60 transitions, 409 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-11-08 19:17:24,340 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 335 flow [2024-11-08 19:17:24,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2024-11-08 19:17:24,342 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2024-11-08 19:17:24,342 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 335 flow [2024-11-08 19:17:24,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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 19:17:24,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:24,343 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:24,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 19:17:24,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:24,548 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:24,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2029398496, now seen corresponding path program 1 times [2024-11-08 19:17:24,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:24,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394330391] [2024-11-08 19:17:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:24,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:17:24,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:24,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394330391] [2024-11-08 19:17:24,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394330391] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:17:24,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860665325] [2024-11-08 19:17:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:24,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:24,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:17:24,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:17:24,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 19:17:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:25,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 19:17:25,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:17:25,081 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 19:17:25,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 19:17:25,196 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 18 treesize of output 13 [2024-11-08 19:17:25,209 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 19:17:25,209 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 19:17:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:17:25,286 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 19:17:25,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860665325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:25,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 19:17:25,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-08 19:17:25,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461462963] [2024-11-08 19:17:25,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:25,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 19:17:25,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:25,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 19:17:25,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-08 19:17:25,363 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2024-11-08 19:17:25,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 335 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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 19:17:25,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:25,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2024-11-08 19:17:25,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:25,518 INFO L124 PetriNetUnfolderBase]: 208/480 cut-off events. [2024-11-08 19:17:25,518 INFO L125 PetriNetUnfolderBase]: For 867/867 co-relation queries the response was YES. [2024-11-08 19:17:25,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 480 events. 208/480 cut-off events. For 867/867 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2192 event pairs, 122 based on Foata normal form. 46/440 useless extension candidates. Maximal degree in co-relation 1073. Up to 304 conditions per place. [2024-11-08 19:17:25,522 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 36 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-11-08 19:17:25,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 55 transitions, 370 flow [2024-11-08 19:17:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 19:17:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 19:17:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-11-08 19:17:25,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-11-08 19:17:25,524 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 335 flow. Second operand 4 states and 92 transitions. [2024-11-08 19:17:25,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 55 transitions, 370 flow [2024-11-08 19:17:25,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 330 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-11-08 19:17:25,527 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 258 flow [2024-11-08 19:17:25,528 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-11-08 19:17:25,528 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2024-11-08 19:17:25,528 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 258 flow [2024-11-08 19:17:25,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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 19:17:25,529 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:25,529 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:25,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 19:17:25,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 19:17:25,730 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:25,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:25,730 INFO L85 PathProgramCache]: Analyzing trace with hash 539849834, now seen corresponding path program 1 times [2024-11-08 19:17:25,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:25,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619826709] [2024-11-08 19:17:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:25,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:25,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:25,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619826709] [2024-11-08 19:17:25,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619826709] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:25,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:25,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 19:17:25,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689073732] [2024-11-08 19:17:25,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:25,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 19:17:25,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 19:17:25,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 19:17:25,910 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2024-11-08 19:17:25,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 19:17:25,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:25,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2024-11-08 19:17:25,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:26,157 INFO L124 PetriNetUnfolderBase]: 567/1023 cut-off events. [2024-11-08 19:17:26,157 INFO L125 PetriNetUnfolderBase]: For 412/416 co-relation queries the response was YES. [2024-11-08 19:17:26,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2342 conditions, 1023 events. 567/1023 cut-off events. For 412/416 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4753 event pairs, 216 based on Foata normal form. 12/956 useless extension candidates. Maximal degree in co-relation 2281. Up to 631 conditions per place. [2024-11-08 19:17:26,165 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 70 selfloop transitions, 7 changer transitions 0/90 dead transitions. [2024-11-08 19:17:26,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 533 flow [2024-11-08 19:17:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 19:17:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 19:17:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-11-08 19:17:26,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4303030303030303 [2024-11-08 19:17:26,166 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 258 flow. Second operand 5 states and 142 transitions. [2024-11-08 19:17:26,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 533 flow [2024-11-08 19:17:26,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 528 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 19:17:26,169 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 307 flow [2024-11-08 19:17:26,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-11-08 19:17:26,170 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2024-11-08 19:17:26,170 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 307 flow [2024-11-08 19:17:26,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 19:17:26,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:26,171 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:26,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-08 19:17:26,171 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:26,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:26,171 INFO L85 PathProgramCache]: Analyzing trace with hash 180764432, now seen corresponding path program 1 times [2024-11-08 19:17:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:26,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292602699] [2024-11-08 19:17:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:26,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:26,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292602699] [2024-11-08 19:17:26,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292602699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:26,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:26,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 19:17:26,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982268493] [2024-11-08 19:17:26,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:26,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 19:17:26,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 19:17:26,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 19:17:26,312 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:17:26,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 19:17:26,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:26,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:17:26,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:26,649 INFO L124 PetriNetUnfolderBase]: 986/1609 cut-off events. [2024-11-08 19:17:26,649 INFO L125 PetriNetUnfolderBase]: For 898/898 co-relation queries the response was YES. [2024-11-08 19:17:26,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4582 conditions, 1609 events. 986/1609 cut-off events. For 898/898 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7072 event pairs, 379 based on Foata normal form. 22/1631 useless extension candidates. Maximal degree in co-relation 4519. Up to 978 conditions per place. [2024-11-08 19:17:26,660 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 80 selfloop transitions, 16 changer transitions 0/107 dead transitions. [2024-11-08 19:17:26,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 107 transitions, 686 flow [2024-11-08 19:17:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 19:17:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 19:17:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-11-08 19:17:26,662 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4303030303030303 [2024-11-08 19:17:26,662 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 307 flow. Second operand 5 states and 142 transitions. [2024-11-08 19:17:26,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 107 transitions, 686 flow [2024-11-08 19:17:26,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 686 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 19:17:26,666 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 434 flow [2024-11-08 19:17:26,667 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=434, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-11-08 19:17:26,667 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2024-11-08 19:17:26,667 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 434 flow [2024-11-08 19:17:26,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 19:17:26,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:26,668 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:26,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-08 19:17:26,668 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:26,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:26,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1820431378, now seen corresponding path program 2 times [2024-11-08 19:17:26,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:26,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126076018] [2024-11-08 19:17:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:26,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:26,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:26,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126076018] [2024-11-08 19:17:26,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126076018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:17:26,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552402282] [2024-11-08 19:17:26,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 19:17:26,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:26,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:17:26,799 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:17:26,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 19:17:26,914 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 19:17:26,915 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:17:26,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 19:17:26,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:17:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:26,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:17:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:26,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552402282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:17:26,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:17:26,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-08 19:17:26,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804535368] [2024-11-08 19:17:26,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:17:26,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 19:17:26,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:26,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 19:17:26,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-08 19:17:27,019 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:17:27,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 434 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 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 19:17:27,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:27,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:17:27,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:27,623 INFO L124 PetriNetUnfolderBase]: 1016/1704 cut-off events. [2024-11-08 19:17:27,623 INFO L125 PetriNetUnfolderBase]: For 1986/1986 co-relation queries the response was YES. [2024-11-08 19:17:27,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5827 conditions, 1704 events. 1016/1704 cut-off events. For 1986/1986 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 7869 event pairs, 35 based on Foata normal form. 101/1805 useless extension candidates. Maximal degree in co-relation 5760. Up to 338 conditions per place. [2024-11-08 19:17:27,638 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 129 selfloop transitions, 46 changer transitions 0/186 dead transitions. [2024-11-08 19:17:27,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 186 transitions, 1330 flow [2024-11-08 19:17:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 19:17:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-08 19:17:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 330 transitions. [2024-11-08 19:17:27,640 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-11-08 19:17:27,641 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 434 flow. Second operand 14 states and 330 transitions. [2024-11-08 19:17:27,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 186 transitions, 1330 flow [2024-11-08 19:17:27,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 186 transitions, 1326 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-08 19:17:27,649 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 742 flow [2024-11-08 19:17:27,649 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=742, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-11-08 19:17:27,650 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 29 predicate places. [2024-11-08 19:17:27,650 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 742 flow [2024-11-08 19:17:27,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 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 19:17:27,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:27,651 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:27,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 19:17:27,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 19:17:27,852 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:27,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:27,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1239706590, now seen corresponding path program 2 times [2024-11-08 19:17:27,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:27,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802062957] [2024-11-08 19:17:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:27,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:27,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:27,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802062957] [2024-11-08 19:17:27,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802062957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:27,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:27,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 19:17:27,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833104489] [2024-11-08 19:17:27,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:27,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 19:17:27,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:27,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 19:17:27,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 19:17:28,009 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2024-11-08 19:17:28,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 742 flow. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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 19:17:28,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:28,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2024-11-08 19:17:28,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:28,391 INFO L124 PetriNetUnfolderBase]: 722/1295 cut-off events. [2024-11-08 19:17:28,392 INFO L125 PetriNetUnfolderBase]: For 2950/2958 co-relation queries the response was YES. [2024-11-08 19:17:28,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 1295 events. 722/1295 cut-off events. For 2950/2958 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6472 event pairs, 202 based on Foata normal form. 11/1271 useless extension candidates. Maximal degree in co-relation 4972. Up to 701 conditions per place. [2024-11-08 19:17:28,405 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 105 selfloop transitions, 15 changer transitions 15/153 dead transitions. [2024-11-08 19:17:28,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 153 transitions, 1284 flow [2024-11-08 19:17:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 19:17:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 19:17:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-11-08 19:17:28,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-11-08 19:17:28,407 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 742 flow. Second operand 7 states and 194 transitions. [2024-11-08 19:17:28,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 153 transitions, 1284 flow [2024-11-08 19:17:28,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 153 transitions, 1215 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-11-08 19:17:28,422 INFO L231 Difference]: Finished difference. Result has 99 places, 104 transitions, 755 flow [2024-11-08 19:17:28,422 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=755, PETRI_PLACES=99, PETRI_TRANSITIONS=104} [2024-11-08 19:17:28,422 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 37 predicate places. [2024-11-08 19:17:28,423 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 104 transitions, 755 flow [2024-11-08 19:17:28,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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 19:17:28,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:28,423 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:28,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-08 19:17:28,423 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:28,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:28,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1447881738, now seen corresponding path program 3 times [2024-11-08 19:17:28,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:28,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129349949] [2024-11-08 19:17:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:28,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:28,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:28,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129349949] [2024-11-08 19:17:28,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129349949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:28,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:28,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 19:17:28,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922695257] [2024-11-08 19:17:28,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:28,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 19:17:28,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:28,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 19:17:28,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 19:17:28,538 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 66 [2024-11-08 19:17:28,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 104 transitions, 755 flow. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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 19:17:28,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:28,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 66 [2024-11-08 19:17:28,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:28,916 INFO L124 PetriNetUnfolderBase]: 716/1336 cut-off events. [2024-11-08 19:17:28,916 INFO L125 PetriNetUnfolderBase]: For 4185/4221 co-relation queries the response was YES. [2024-11-08 19:17:28,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5421 conditions, 1336 events. 716/1336 cut-off events. For 4185/4221 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6938 event pairs, 215 based on Foata normal form. 4/1325 useless extension candidates. Maximal degree in co-relation 5343. Up to 587 conditions per place. [2024-11-08 19:17:28,929 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 102 selfloop transitions, 19 changer transitions 10/156 dead transitions. [2024-11-08 19:17:28,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 156 transitions, 1390 flow [2024-11-08 19:17:28,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 19:17:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 19:17:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-11-08 19:17:28,931 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-11-08 19:17:28,931 INFO L175 Difference]: Start difference. First operand has 99 places, 104 transitions, 755 flow. Second operand 7 states and 188 transitions. [2024-11-08 19:17:28,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 156 transitions, 1390 flow [2024-11-08 19:17:28,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 156 transitions, 1366 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-08 19:17:28,950 INFO L231 Difference]: Finished difference. Result has 105 places, 105 transitions, 823 flow [2024-11-08 19:17:28,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=823, PETRI_PLACES=105, PETRI_TRANSITIONS=105} [2024-11-08 19:17:28,951 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 43 predicate places. [2024-11-08 19:17:28,952 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 105 transitions, 823 flow [2024-11-08 19:17:28,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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 19:17:28,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:28,953 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:28,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-08 19:17:28,953 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:28,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash 493859490, now seen corresponding path program 3 times [2024-11-08 19:17:28,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:28,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178059463] [2024-11-08 19:17:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:28,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:29,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:29,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178059463] [2024-11-08 19:17:29,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178059463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:29,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:29,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 19:17:29,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525408180] [2024-11-08 19:17:29,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:29,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 19:17:29,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:29,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 19:17:29,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-08 19:17:29,094 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2024-11-08 19:17:29,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 105 transitions, 823 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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 19:17:29,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:29,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2024-11-08 19:17:29,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:29,537 INFO L124 PetriNetUnfolderBase]: 826/1502 cut-off events. [2024-11-08 19:17:29,537 INFO L125 PetriNetUnfolderBase]: For 4729/4761 co-relation queries the response was YES. [2024-11-08 19:17:29,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6306 conditions, 1502 events. 826/1502 cut-off events. For 4729/4761 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7756 event pairs, 138 based on Foata normal form. 34/1528 useless extension candidates. Maximal degree in co-relation 6225. Up to 576 conditions per place. [2024-11-08 19:17:29,558 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 117 selfloop transitions, 35 changer transitions 2/171 dead transitions. [2024-11-08 19:17:29,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 171 transitions, 1560 flow [2024-11-08 19:17:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 19:17:29,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 19:17:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-11-08 19:17:29,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-11-08 19:17:29,561 INFO L175 Difference]: Start difference. First operand has 105 places, 105 transitions, 823 flow. Second operand 7 states and 188 transitions. [2024-11-08 19:17:29,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 171 transitions, 1560 flow [2024-11-08 19:17:29,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 171 transitions, 1523 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-11-08 19:17:29,605 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 1003 flow [2024-11-08 19:17:29,606 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1003, PETRI_PLACES=110, PETRI_TRANSITIONS=115} [2024-11-08 19:17:29,606 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 48 predicate places. [2024-11-08 19:17:29,606 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 1003 flow [2024-11-08 19:17:29,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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 19:17:29,607 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:29,607 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:29,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-08 19:17:29,607 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:29,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash 399401874, now seen corresponding path program 4 times [2024-11-08 19:17:29,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:29,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351073016] [2024-11-08 19:17:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:29,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:29,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:29,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351073016] [2024-11-08 19:17:29,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351073016] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:29,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:29,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 19:17:29,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428696702] [2024-11-08 19:17:29,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:29,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 19:17:29,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:29,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 19:17:29,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 19:17:29,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2024-11-08 19:17:29,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 115 transitions, 1003 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 19:17:29,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:29,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2024-11-08 19:17:29,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:30,115 INFO L124 PetriNetUnfolderBase]: 874/1574 cut-off events. [2024-11-08 19:17:30,115 INFO L125 PetriNetUnfolderBase]: For 7327/7387 co-relation queries the response was YES. [2024-11-08 19:17:30,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7027 conditions, 1574 events. 874/1574 cut-off events. For 7327/7387 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8212 event pairs, 265 based on Foata normal form. 20/1569 useless extension candidates. Maximal degree in co-relation 6944. Up to 926 conditions per place. [2024-11-08 19:17:30,133 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 96 selfloop transitions, 33 changer transitions 7/163 dead transitions. [2024-11-08 19:17:30,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 163 transitions, 1671 flow [2024-11-08 19:17:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 19:17:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 19:17:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-11-08 19:17:30,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-11-08 19:17:30,135 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 1003 flow. Second operand 6 states and 169 transitions. [2024-11-08 19:17:30,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 163 transitions, 1671 flow [2024-11-08 19:17:30,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 163 transitions, 1655 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-08 19:17:30,159 INFO L231 Difference]: Finished difference. Result has 118 places, 126 transitions, 1260 flow [2024-11-08 19:17:30,159 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1260, PETRI_PLACES=118, PETRI_TRANSITIONS=126} [2024-11-08 19:17:30,160 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 56 predicate places. [2024-11-08 19:17:30,160 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 126 transitions, 1260 flow [2024-11-08 19:17:30,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 19:17:30,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:30,160 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:30,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-08 19:17:30,161 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:30,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:30,161 INFO L85 PathProgramCache]: Analyzing trace with hash 129562782, now seen corresponding path program 4 times [2024-11-08 19:17:30,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:30,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715966989] [2024-11-08 19:17:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:30,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:30,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:30,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715966989] [2024-11-08 19:17:30,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715966989] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:30,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:30,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 19:17:30,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098431013] [2024-11-08 19:17:30,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:30,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 19:17:30,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:30,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 19:17:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-08 19:17:30,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:17:30,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 126 transitions, 1260 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 19:17:30,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:30,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:17:30,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:30,781 INFO L124 PetriNetUnfolderBase]: 1128/1914 cut-off events. [2024-11-08 19:17:30,781 INFO L125 PetriNetUnfolderBase]: For 9919/9919 co-relation queries the response was YES. [2024-11-08 19:17:30,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9002 conditions, 1914 events. 1128/1914 cut-off events. For 9919/9919 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9344 event pairs, 412 based on Foata normal form. 24/1938 useless extension candidates. Maximal degree in co-relation 8915. Up to 1155 conditions per place. [2024-11-08 19:17:30,804 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 113 selfloop transitions, 35 changer transitions 3/162 dead transitions. [2024-11-08 19:17:30,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 162 transitions, 1792 flow [2024-11-08 19:17:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 19:17:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 19:17:30,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-11-08 19:17:30,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4065656565656566 [2024-11-08 19:17:30,806 INFO L175 Difference]: Start difference. First operand has 118 places, 126 transitions, 1260 flow. Second operand 6 states and 161 transitions. [2024-11-08 19:17:30,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 162 transitions, 1792 flow [2024-11-08 19:17:30,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 162 transitions, 1718 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-11-08 19:17:30,839 INFO L231 Difference]: Finished difference. Result has 124 places, 127 transitions, 1318 flow [2024-11-08 19:17:30,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1318, PETRI_PLACES=124, PETRI_TRANSITIONS=127} [2024-11-08 19:17:30,840 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 62 predicate places. [2024-11-08 19:17:30,840 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 127 transitions, 1318 flow [2024-11-08 19:17:30,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 19:17:30,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:30,841 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:30,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-08 19:17:30,841 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:30,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:30,841 INFO L85 PathProgramCache]: Analyzing trace with hash -787891248, now seen corresponding path program 5 times [2024-11-08 19:17:30,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:30,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405151015] [2024-11-08 19:17:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:30,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:30,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:30,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405151015] [2024-11-08 19:17:30,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405151015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:30,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:30,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 19:17:30,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069329169] [2024-11-08 19:17:30,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:30,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 19:17:30,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:30,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 19:17:30,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 19:17:30,965 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2024-11-08 19:17:30,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 127 transitions, 1318 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 19:17:30,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:30,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2024-11-08 19:17:30,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:31,329 INFO L124 PetriNetUnfolderBase]: 818/1462 cut-off events. [2024-11-08 19:17:31,329 INFO L125 PetriNetUnfolderBase]: For 8353/8374 co-relation queries the response was YES. [2024-11-08 19:17:31,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7154 conditions, 1462 events. 818/1462 cut-off events. For 8353/8374 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7446 event pairs, 264 based on Foata normal form. 11/1438 useless extension candidates. Maximal degree in co-relation 7064. Up to 881 conditions per place. [2024-11-08 19:17:31,348 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 95 selfloop transitions, 24 changer transitions 8/147 dead transitions. [2024-11-08 19:17:31,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 147 transitions, 1654 flow [2024-11-08 19:17:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 19:17:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 19:17:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-11-08 19:17:31,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-11-08 19:17:31,350 INFO L175 Difference]: Start difference. First operand has 124 places, 127 transitions, 1318 flow. Second operand 6 states and 154 transitions. [2024-11-08 19:17:31,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 147 transitions, 1654 flow [2024-11-08 19:17:31,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 147 transitions, 1606 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-08 19:17:31,379 INFO L231 Difference]: Finished difference. Result has 128 places, 121 transitions, 1223 flow [2024-11-08 19:17:31,380 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1223, PETRI_PLACES=128, PETRI_TRANSITIONS=121} [2024-11-08 19:17:31,381 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 66 predicate places. [2024-11-08 19:17:31,381 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 121 transitions, 1223 flow [2024-11-08 19:17:31,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 19:17:31,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:31,381 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:31,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-08 19:17:31,381 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:31,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:31,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1330409626, now seen corresponding path program 5 times [2024-11-08 19:17:31,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:31,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770099691] [2024-11-08 19:17:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:31,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:31,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:31,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770099691] [2024-11-08 19:17:31,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770099691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:31,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:31,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 19:17:31,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418513066] [2024-11-08 19:17:31,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:31,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 19:17:31,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:31,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 19:17:31,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 19:17:31,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:17:31,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 121 transitions, 1223 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 19:17:31,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:31,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:17:31,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:31,996 INFO L124 PetriNetUnfolderBase]: 1305/2199 cut-off events. [2024-11-08 19:17:31,997 INFO L125 PetriNetUnfolderBase]: For 12005/12005 co-relation queries the response was YES. [2024-11-08 19:17:32,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10187 conditions, 2199 events. 1305/2199 cut-off events. For 12005/12005 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11140 event pairs, 407 based on Foata normal form. 13/2212 useless extension candidates. Maximal degree in co-relation 10096. Up to 1167 conditions per place. [2024-11-08 19:17:32,022 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 125 selfloop transitions, 33 changer transitions 0/169 dead transitions. [2024-11-08 19:17:32,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 169 transitions, 1865 flow [2024-11-08 19:17:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 19:17:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 19:17:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-11-08 19:17:32,023 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-11-08 19:17:32,024 INFO L175 Difference]: Start difference. First operand has 128 places, 121 transitions, 1223 flow. Second operand 6 states and 158 transitions. [2024-11-08 19:17:32,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 169 transitions, 1865 flow [2024-11-08 19:17:32,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 169 transitions, 1786 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-08 19:17:32,067 INFO L231 Difference]: Finished difference. Result has 125 places, 128 transitions, 1323 flow [2024-11-08 19:17:32,067 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1323, PETRI_PLACES=125, PETRI_TRANSITIONS=128} [2024-11-08 19:17:32,070 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 63 predicate places. [2024-11-08 19:17:32,074 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 128 transitions, 1323 flow [2024-11-08 19:17:32,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 19:17:32,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:32,075 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:32,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-08 19:17:32,075 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:32,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1225090526, now seen corresponding path program 6 times [2024-11-08 19:17:32,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:32,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867493817] [2024-11-08 19:17:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:32,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:32,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:32,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867493817] [2024-11-08 19:17:32,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867493817] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:32,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:32,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 19:17:32,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239875261] [2024-11-08 19:17:32,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:32,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 19:17:32,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:32,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 19:17:32,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 19:17:32,183 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2024-11-08 19:17:32,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 128 transitions, 1323 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 19:17:32,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:32,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2024-11-08 19:17:32,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:32,648 INFO L124 PetriNetUnfolderBase]: 966/1747 cut-off events. [2024-11-08 19:17:32,649 INFO L125 PetriNetUnfolderBase]: For 10315/10336 co-relation queries the response was YES. [2024-11-08 19:17:32,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8301 conditions, 1747 events. 966/1747 cut-off events. For 10315/10336 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9399 event pairs, 307 based on Foata normal form. 12/1740 useless extension candidates. Maximal degree in co-relation 8211. Up to 901 conditions per place. [2024-11-08 19:17:32,671 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 102 selfloop transitions, 33 changer transitions 5/161 dead transitions. [2024-11-08 19:17:32,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 161 transitions, 1833 flow [2024-11-08 19:17:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 19:17:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 19:17:32,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-11-08 19:17:32,673 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4116161616161616 [2024-11-08 19:17:32,673 INFO L175 Difference]: Start difference. First operand has 125 places, 128 transitions, 1323 flow. Second operand 6 states and 163 transitions. [2024-11-08 19:17:32,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 161 transitions, 1833 flow [2024-11-08 19:17:32,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 161 transitions, 1777 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-08 19:17:32,708 INFO L231 Difference]: Finished difference. Result has 130 places, 128 transitions, 1359 flow [2024-11-08 19:17:32,709 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1359, PETRI_PLACES=130, PETRI_TRANSITIONS=128} [2024-11-08 19:17:32,709 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 68 predicate places. [2024-11-08 19:17:32,709 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 128 transitions, 1359 flow [2024-11-08 19:17:32,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 19:17:32,710 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:32,710 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:32,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-08 19:17:32,710 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:32,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:32,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1331449386, now seen corresponding path program 7 times [2024-11-08 19:17:32,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:32,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210335483] [2024-11-08 19:17:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:32,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:32,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:32,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210335483] [2024-11-08 19:17:32,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210335483] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:32,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:32,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 19:17:32,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410949990] [2024-11-08 19:17:32,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:32,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 19:17:32,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:32,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 19:17:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 19:17:32,839 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:17:32,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 128 transitions, 1359 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 19:17:32,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:32,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:17:32,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:33,431 INFO L124 PetriNetUnfolderBase]: 1397/2349 cut-off events. [2024-11-08 19:17:33,432 INFO L125 PetriNetUnfolderBase]: For 14035/14035 co-relation queries the response was YES. [2024-11-08 19:17:33,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11202 conditions, 2349 events. 1397/2349 cut-off events. For 14035/14035 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11958 event pairs, 427 based on Foata normal form. 12/2361 useless extension candidates. Maximal degree in co-relation 11109. Up to 1099 conditions per place. [2024-11-08 19:17:33,458 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 120 selfloop transitions, 39 changer transitions 3/173 dead transitions. [2024-11-08 19:17:33,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 173 transitions, 2003 flow [2024-11-08 19:17:33,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 19:17:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 19:17:33,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-11-08 19:17:33,459 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40404040404040403 [2024-11-08 19:17:33,460 INFO L175 Difference]: Start difference. First operand has 130 places, 128 transitions, 1359 flow. Second operand 6 states and 160 transitions. [2024-11-08 19:17:33,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 173 transitions, 2003 flow [2024-11-08 19:17:33,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 173 transitions, 1891 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-11-08 19:17:33,505 INFO L231 Difference]: Finished difference. Result has 129 places, 129 transitions, 1365 flow [2024-11-08 19:17:33,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1365, PETRI_PLACES=129, PETRI_TRANSITIONS=129} [2024-11-08 19:17:33,506 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 67 predicate places. [2024-11-08 19:17:33,506 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 129 transitions, 1365 flow [2024-11-08 19:17:33,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 19:17:33,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:33,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:33,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-08 19:17:33,507 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:33,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash -334420306, now seen corresponding path program 6 times [2024-11-08 19:17:33,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:33,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187578804] [2024-11-08 19:17:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:33,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:33,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:33,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187578804] [2024-11-08 19:17:33,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187578804] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:33,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:33,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 19:17:33,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971624977] [2024-11-08 19:17:33,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:33,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 19:17:33,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 19:17:33,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 19:17:33,607 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2024-11-08 19:17:33,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 129 transitions, 1365 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 19:17:33,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:33,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2024-11-08 19:17:33,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:33,977 INFO L124 PetriNetUnfolderBase]: 1042/1851 cut-off events. [2024-11-08 19:17:33,977 INFO L125 PetriNetUnfolderBase]: For 12444/12479 co-relation queries the response was YES. [2024-11-08 19:17:33,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9189 conditions, 1851 events. 1042/1851 cut-off events. For 12444/12479 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 10052 event pairs, 332 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 9098. Up to 1052 conditions per place. [2024-11-08 19:17:33,999 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 90 selfloop transitions, 28 changer transitions 4/150 dead transitions. [2024-11-08 19:17:34,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 150 transitions, 1708 flow [2024-11-08 19:17:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 19:17:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 19:17:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-11-08 19:17:34,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-11-08 19:17:34,001 INFO L175 Difference]: Start difference. First operand has 129 places, 129 transitions, 1365 flow. Second operand 6 states and 150 transitions. [2024-11-08 19:17:34,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 150 transitions, 1708 flow [2024-11-08 19:17:34,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 150 transitions, 1574 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-11-08 19:17:34,040 INFO L231 Difference]: Finished difference. Result has 125 places, 125 transitions, 1247 flow [2024-11-08 19:17:34,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1247, PETRI_PLACES=125, PETRI_TRANSITIONS=125} [2024-11-08 19:17:34,041 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 63 predicate places. [2024-11-08 19:17:34,041 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 125 transitions, 1247 flow [2024-11-08 19:17:34,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 19:17:34,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:34,042 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:34,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-08 19:17:34,042 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:34,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash -103102202, now seen corresponding path program 7 times [2024-11-08 19:17:34,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:34,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41303027] [2024-11-08 19:17:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:34,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:34,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:34,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41303027] [2024-11-08 19:17:34,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41303027] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:17:34,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:17:34,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 19:17:34,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033329934] [2024-11-08 19:17:34,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:17:34,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 19:17:34,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:34,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 19:17:34,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-08 19:17:34,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:17:34,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 125 transitions, 1247 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 19:17:34,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:34,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:17:34,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:34,560 INFO L124 PetriNetUnfolderBase]: 1323/2207 cut-off events. [2024-11-08 19:17:34,560 INFO L125 PetriNetUnfolderBase]: For 11095/11095 co-relation queries the response was YES. [2024-11-08 19:17:34,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10174 conditions, 2207 events. 1323/2207 cut-off events. For 11095/11095 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11006 event pairs, 472 based on Foata normal form. 13/2220 useless extension candidates. Maximal degree in co-relation 10085. Up to 1294 conditions per place. [2024-11-08 19:17:34,580 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 113 selfloop transitions, 38 changer transitions 2/164 dead transitions. [2024-11-08 19:17:34,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 164 transitions, 1774 flow [2024-11-08 19:17:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 19:17:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 19:17:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-11-08 19:17:34,581 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-08 19:17:34,581 INFO L175 Difference]: Start difference. First operand has 125 places, 125 transitions, 1247 flow. Second operand 6 states and 153 transitions. [2024-11-08 19:17:34,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 164 transitions, 1774 flow [2024-11-08 19:17:34,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 164 transitions, 1683 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-11-08 19:17:34,616 INFO L231 Difference]: Finished difference. Result has 120 places, 126 transitions, 1260 flow [2024-11-08 19:17:34,617 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1260, PETRI_PLACES=120, PETRI_TRANSITIONS=126} [2024-11-08 19:17:34,617 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 58 predicate places. [2024-11-08 19:17:34,618 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 126 transitions, 1260 flow [2024-11-08 19:17:34,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 19:17:34,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:34,618 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:34,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-08 19:17:34,618 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:34,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:34,619 INFO L85 PathProgramCache]: Analyzing trace with hash 105417514, now seen corresponding path program 1 times [2024-11-08 19:17:34,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:34,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941534470] [2024-11-08 19:17:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:34,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:17:34,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:34,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941534470] [2024-11-08 19:17:34,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941534470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:17:34,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469430220] [2024-11-08 19:17:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:34,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:34,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:17:34,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:17:34,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 19:17:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:34,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 19:17:34,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:17:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:17:35,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:17:35,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2024-11-08 19:17:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:17:35,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469430220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:17:35,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:17:35,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-08 19:17:35,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876385272] [2024-11-08 19:17:35,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:17:35,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 19:17:35,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:35,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 19:17:35,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-08 19:17:35,426 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2024-11-08 19:17:35,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 126 transitions, 1260 flow. Second operand has 15 states, 15 states have (on average 20.266666666666666) internal successors, (304), 15 states have internal predecessors, (304), 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 19:17:35,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:35,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2024-11-08 19:17:35,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:36,947 INFO L124 PetriNetUnfolderBase]: 2080/4291 cut-off events. [2024-11-08 19:17:36,947 INFO L125 PetriNetUnfolderBase]: For 22891/23040 co-relation queries the response was YES. [2024-11-08 19:17:36,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19328 conditions, 4291 events. 2080/4291 cut-off events. For 22891/23040 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31843 event pairs, 214 based on Foata normal form. 101/4336 useless extension candidates. Maximal degree in co-relation 17950. Up to 784 conditions per place. [2024-11-08 19:17:37,004 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 328 selfloop transitions, 51 changer transitions 21/434 dead transitions. [2024-11-08 19:17:37,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 434 transitions, 5565 flow [2024-11-08 19:17:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 19:17:37,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-08 19:17:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 428 transitions. [2024-11-08 19:17:37,006 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3602693602693603 [2024-11-08 19:17:37,006 INFO L175 Difference]: Start difference. First operand has 120 places, 126 transitions, 1260 flow. Second operand 18 states and 428 transitions. [2024-11-08 19:17:37,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 434 transitions, 5565 flow [2024-11-08 19:17:37,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 434 transitions, 5156 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-11-08 19:17:37,101 INFO L231 Difference]: Finished difference. Result has 134 places, 162 transitions, 1565 flow [2024-11-08 19:17:37,101 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1565, PETRI_PLACES=134, PETRI_TRANSITIONS=162} [2024-11-08 19:17:37,101 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 72 predicate places. [2024-11-08 19:17:37,102 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 162 transitions, 1565 flow [2024-11-08 19:17:37,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.266666666666666) internal successors, (304), 15 states have internal predecessors, (304), 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 19:17:37,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:37,102 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:17:37,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 19:17:37,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:37,307 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:37,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash -542635852, now seen corresponding path program 2 times [2024-11-08 19:17:37,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:37,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901818879] [2024-11-08 19:17:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:37,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:17:37,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:37,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901818879] [2024-11-08 19:17:37,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901818879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:17:37,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953659759] [2024-11-08 19:17:37,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 19:17:37,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:37,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:17:37,546 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:17:37,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 19:17:37,673 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 19:17:37,673 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:17:37,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 19:17:37,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:17:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:37,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:17:37,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2024-11-08 19:17:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:17:38,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953659759] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:17:38,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:17:38,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-08 19:17:38,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716645241] [2024-11-08 19:17:38,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:17:38,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 19:17:38,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:38,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 19:17:38,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-08 19:17:38,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2024-11-08 19:17:38,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 162 transitions, 1565 flow. Second operand has 15 states, 15 states have (on average 19.866666666666667) internal successors, (298), 15 states have internal predecessors, (298), 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 19:17:38,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:38,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2024-11-08 19:17:38,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:41,012 INFO L124 PetriNetUnfolderBase]: 7023/14371 cut-off events. [2024-11-08 19:17:41,012 INFO L125 PetriNetUnfolderBase]: For 73147/73732 co-relation queries the response was YES. [2024-11-08 19:17:41,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64713 conditions, 14371 events. 7023/14371 cut-off events. For 73147/73732 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 131052 event pairs, 732 based on Foata normal form. 341/14452 useless extension candidates. Maximal degree in co-relation 49732. Up to 2769 conditions per place. [2024-11-08 19:17:41,178 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 354 selfloop transitions, 61 changer transitions 32/481 dead transitions. [2024-11-08 19:17:41,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 481 transitions, 5960 flow [2024-11-08 19:17:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 19:17:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-08 19:17:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 345 transitions. [2024-11-08 19:17:41,180 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37337662337662336 [2024-11-08 19:17:41,180 INFO L175 Difference]: Start difference. First operand has 134 places, 162 transitions, 1565 flow. Second operand 14 states and 345 transitions. [2024-11-08 19:17:41,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 481 transitions, 5960 flow [2024-11-08 19:17:41,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 481 transitions, 5942 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-08 19:17:41,831 INFO L231 Difference]: Finished difference. Result has 153 places, 187 transitions, 2066 flow [2024-11-08 19:17:41,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2066, PETRI_PLACES=153, PETRI_TRANSITIONS=187} [2024-11-08 19:17:41,832 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 91 predicate places. [2024-11-08 19:17:41,832 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 187 transitions, 2066 flow [2024-11-08 19:17:41,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.866666666666667) internal successors, (298), 15 states have internal predecessors, (298), 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 19:17:41,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:41,833 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 19:17:41,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 19:17:42,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:42,033 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:42,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:42,034 INFO L85 PathProgramCache]: Analyzing trace with hash 758597359, now seen corresponding path program 3 times [2024-11-08 19:17:42,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:42,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317872312] [2024-11-08 19:17:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:42,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 19:17:42,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:42,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317872312] [2024-11-08 19:17:42,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317872312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:17:42,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952391846] [2024-11-08 19:17:42,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 19:17:42,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:42,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:17:42,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:17:42,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 19:17:42,319 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 19:17:42,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:17:42,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 19:17:42,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:17:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 19:17:42,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:17:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 19:17:42,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952391846] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:17:42,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:17:42,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-08 19:17:42,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360967976] [2024-11-08 19:17:42,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:17:42,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 19:17:42,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:42,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 19:17:42,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-08 19:17:42,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:17:42,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 187 transitions, 2066 flow. Second operand has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 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 19:17:42,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:42,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:17:42,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:17:48,923 INFO L124 PetriNetUnfolderBase]: 19321/31545 cut-off events. [2024-11-08 19:17:48,923 INFO L125 PetriNetUnfolderBase]: For 137172/137172 co-relation queries the response was YES. [2024-11-08 19:17:49,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137698 conditions, 31545 events. 19321/31545 cut-off events. For 137172/137172 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 235525 event pairs, 1039 based on Foata normal form. 848/32393 useless extension candidates. Maximal degree in co-relation 122723. Up to 5655 conditions per place. [2024-11-08 19:17:49,268 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 542 selfloop transitions, 140 changer transitions 26/727 dead transitions. [2024-11-08 19:17:49,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 727 transitions, 8938 flow [2024-11-08 19:17:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-08 19:17:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-08 19:17:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 698 transitions. [2024-11-08 19:17:49,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3525252525252525 [2024-11-08 19:17:49,272 INFO L175 Difference]: Start difference. First operand has 153 places, 187 transitions, 2066 flow. Second operand 30 states and 698 transitions. [2024-11-08 19:17:49,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 727 transitions, 8938 flow [2024-11-08 19:17:50,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 727 transitions, 8670 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-11-08 19:17:50,671 INFO L231 Difference]: Finished difference. Result has 197 places, 269 transitions, 3126 flow [2024-11-08 19:17:50,671 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3126, PETRI_PLACES=197, PETRI_TRANSITIONS=269} [2024-11-08 19:17:50,671 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 135 predicate places. [2024-11-08 19:17:50,671 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 269 transitions, 3126 flow [2024-11-08 19:17:50,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 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 19:17:50,672 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:17:50,672 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 19:17:50,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 19:17:50,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:50,873 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:17:50,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:17:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1144798731, now seen corresponding path program 4 times [2024-11-08 19:17:50,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:17:50,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921032587] [2024-11-08 19:17:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:17:50,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:17:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:17:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 19:17:51,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:17:51,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921032587] [2024-11-08 19:17:51,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921032587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:17:51,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465364037] [2024-11-08 19:17:51,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 19:17:51,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:17:51,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:17:51,009 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:17:51,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 19:17:51,138 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 19:17:51,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:17:51,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 19:17:51,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:17:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 19:17:51,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:17:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 19:17:51,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465364037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:17:51,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:17:51,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-08 19:17:51,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132880982] [2024-11-08 19:17:51,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:17:51,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 19:17:51,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:17:51,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 19:17:51,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-08 19:17:51,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:17:51,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 269 transitions, 3126 flow. Second operand has 13 states, 13 states have (on average 18.076923076923077) internal successors, (235), 13 states have internal predecessors, (235), 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 19:17:51,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:17:51,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:17:51,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:18:01,686 INFO L124 PetriNetUnfolderBase]: 26103/42136 cut-off events. [2024-11-08 19:18:01,687 INFO L125 PetriNetUnfolderBase]: For 433990/433990 co-relation queries the response was YES. [2024-11-08 19:18:02,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246169 conditions, 42136 events. 26103/42136 cut-off events. For 433990/433990 co-relation queries the response was YES. Maximal size of possible extension queue 1305. Compared 317439 event pairs, 7526 based on Foata normal form. 536/42672 useless extension candidates. Maximal degree in co-relation 217321. Up to 25043 conditions per place. [2024-11-08 19:18:02,332 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 543 selfloop transitions, 119 changer transitions 44/725 dead transitions. [2024-11-08 19:18:02,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 725 transitions, 9879 flow [2024-11-08 19:18:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 19:18:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-08 19:18:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 470 transitions. [2024-11-08 19:18:02,335 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3748006379585327 [2024-11-08 19:18:02,335 INFO L175 Difference]: Start difference. First operand has 197 places, 269 transitions, 3126 flow. Second operand 19 states and 470 transitions. [2024-11-08 19:18:02,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 725 transitions, 9879 flow [2024-11-08 19:18:12,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 725 transitions, 9678 flow, removed 92 selfloop flow, removed 2 redundant places. [2024-11-08 19:18:12,855 INFO L231 Difference]: Finished difference. Result has 223 places, 367 transitions, 4738 flow [2024-11-08 19:18:12,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4738, PETRI_PLACES=223, PETRI_TRANSITIONS=367} [2024-11-08 19:18:12,857 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 161 predicate places. [2024-11-08 19:18:12,857 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 367 transitions, 4738 flow [2024-11-08 19:18:12,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.076923076923077) internal successors, (235), 13 states have internal predecessors, (235), 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 19:18:12,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:18:12,858 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 19:18:12,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 19:18:13,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:18:13,063 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:18:13,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:18:13,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1600589973, now seen corresponding path program 5 times [2024-11-08 19:18:13,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:18:13,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066841017] [2024-11-08 19:18:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:18:13,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:18:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:18:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 19:18:13,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:18:13,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066841017] [2024-11-08 19:18:13,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066841017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:18:13,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010621856] [2024-11-08 19:18:13,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 19:18:13,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:18:13,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:18:13,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:18:13,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 19:18:13,340 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-08 19:18:13,340 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:18:13,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 19:18:13,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:18:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 19:18:13,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:18:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 19:18:13,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010621856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:18:13,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:18:13,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-08 19:18:13,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861379434] [2024-11-08 19:18:13,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:18:13,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 19:18:13,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:18:13,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 19:18:13,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-08 19:18:13,526 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:18:13,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 367 transitions, 4738 flow. Second operand has 15 states, 15 states have (on average 17.533333333333335) internal successors, (263), 15 states have internal predecessors, (263), 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 19:18:13,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:18:13,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:18:13,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 19:18:30,001 INFO L124 PetriNetUnfolderBase]: 35486/57854 cut-off events. [2024-11-08 19:18:30,002 INFO L125 PetriNetUnfolderBase]: For 845730/845730 co-relation queries the response was YES. [2024-11-08 19:18:31,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394287 conditions, 57854 events. 35486/57854 cut-off events. For 845730/845730 co-relation queries the response was YES. Maximal size of possible extension queue 1576. Compared 460584 event pairs, 6408 based on Foata normal form. 772/58626 useless extension candidates. Maximal degree in co-relation 362920. Up to 21969 conditions per place. [2024-11-08 19:18:31,335 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 629 selfloop transitions, 215 changer transitions 123/986 dead transitions. [2024-11-08 19:18:31,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 986 transitions, 14243 flow [2024-11-08 19:18:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-08 19:18:31,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-08 19:18:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 643 transitions. [2024-11-08 19:18:31,338 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34794372294372294 [2024-11-08 19:18:31,338 INFO L175 Difference]: Start difference. First operand has 223 places, 367 transitions, 4738 flow. Second operand 28 states and 643 transitions. [2024-11-08 19:18:31,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 986 transitions, 14243 flow [2024-11-08 19:19:11,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 986 transitions, 13198 flow, removed 489 selfloop flow, removed 3 redundant places. [2024-11-08 19:19:11,340 INFO L231 Difference]: Finished difference. Result has 265 places, 458 transitions, 5982 flow [2024-11-08 19:19:11,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4011, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5982, PETRI_PLACES=265, PETRI_TRANSITIONS=458} [2024-11-08 19:19:11,341 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 203 predicate places. [2024-11-08 19:19:11,341 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 458 transitions, 5982 flow [2024-11-08 19:19:11,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.533333333333335) internal successors, (263), 15 states have internal predecessors, (263), 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 19:19:11,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 19:19:11,341 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 19:19:11,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-08 19:19:11,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:19:11,542 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-08 19:19:11,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:19:11,542 INFO L85 PathProgramCache]: Analyzing trace with hash -329008677, now seen corresponding path program 6 times [2024-11-08 19:19:11,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:19:11,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297312676] [2024-11-08 19:19:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:19:11,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:19:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:19:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 19:19:11,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:19:11,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297312676] [2024-11-08 19:19:11,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297312676] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:19:11,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663517812] [2024-11-08 19:19:11,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 19:19:11,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:19:11,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:19:11,717 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:19:11,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5fab3aa-10af-488a-a32e-dcef963b50ab/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 19:19:11,853 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-08 19:19:11,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:19:11,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 19:19:11,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:19:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 19:19:11,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:19:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 19:19:12,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663517812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:19:12,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:19:12,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-08 19:19:12,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626396857] [2024-11-08 19:19:12,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:19:12,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 19:19:12,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:19:12,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 19:19:12,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-08 19:19:12,025 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 66 [2024-11-08 19:19:12,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 458 transitions, 5982 flow. Second operand has 15 states, 15 states have (on average 18.133333333333333) internal successors, (272), 15 states have internal predecessors, (272), 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 19:19:12,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 19:19:12,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 66 [2024-11-08 19:19:12,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand