./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.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_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/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_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/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_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/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 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:27:42,443 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:27:42,549 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:27:42,556 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:27:42,558 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:27:42,584 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:27:42,585 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:27:42,585 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:27:42,586 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:27:42,586 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:27:42,587 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:27:42,587 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:27:42,588 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:27:42,588 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:27:42,589 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:27:42,589 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:27:42,590 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:27:42,590 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:27:42,590 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:27:42,591 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:27:42,591 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:27:42,592 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:27:42,592 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:27:42,593 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:27:42,593 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:27:42,594 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:27:42,594 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:27:42,594 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:27:42,595 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:27:42,595 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:27:42,596 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:27:42,596 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:27:42,597 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:27:42,597 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:27:42,598 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:27:42,598 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:27:42,598 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:27:42,599 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:27:42,599 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:27:42,600 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:27:42,600 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:27:42,600 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:27:42,601 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_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2024-11-08 16:27:42,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:27:42,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:27:42,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:27:42,965 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:27:42,966 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:27:42,967 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c Unable to find full path for "g++" [2024-11-08 16:27:45,102 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:27:45,304 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:27:45,305 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-08 16:27:45,314 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/data/c4f1106c8/10cef0a6e87f4d58a3e15c248c7ba5a1/FLAGd299208aa [2024-11-08 16:27:45,680 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/data/c4f1106c8/10cef0a6e87f4d58a3e15c248c7ba5a1 [2024-11-08 16:27:45,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:27:45,685 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:27:45,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:27:45,687 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:27:45,694 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:27:45,695 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:27:45" (1/1) ... [2024-11-08 16:27:45,696 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57bd4581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:45, skipping insertion in model container [2024-11-08 16:27:45,696 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:27:45" (1/1) ... [2024-11-08 16:27:45,725 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:27:46,043 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 16:27:46,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:27:46,068 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:27:46,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:27:46,139 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:27:46,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46 WrapperNode [2024-11-08 16:27:46,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:27:46,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:27:46,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:27:46,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:27:46,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (1/1) ... [2024-11-08 16:27:46,164 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (1/1) ... [2024-11-08 16:27:46,220 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 23, statements flattened = 266 [2024-11-08 16:27:46,220 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:27:46,222 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:27:46,223 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:27:46,223 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:27:46,240 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (1/1) ... [2024-11-08 16:27:46,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (1/1) ... [2024-11-08 16:27:46,245 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (1/1) ... [2024-11-08 16:27:46,293 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 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 16:27:46,293 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (1/1) ... [2024-11-08 16:27:46,293 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (1/1) ... [2024-11-08 16:27:46,310 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (1/1) ... [2024-11-08 16:27:46,316 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (1/1) ... [2024-11-08 16:27:46,319 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (1/1) ... [2024-11-08 16:27:46,321 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (1/1) ... [2024-11-08 16:27:46,325 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:27:46,326 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:27:46,327 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:27:46,327 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:27:46,331 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (1/1) ... [2024-11-08 16:27:46,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:27:46,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:46,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:27:46,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:27:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:27:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 16:27:46,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 16:27:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 16:27:46,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 16:27:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 16:27:46,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 16:27:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 16:27:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 16:27:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:27:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 16:27:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 16:27:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 16:27:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 16:27:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:27:46,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:27:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:27:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 16:27:46,431 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 16:27:46,575 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:27:46,578 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:27:47,353 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 16:27:47,357 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:27:47,786 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:27:47,820 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 16:27:47,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:27:47 BoogieIcfgContainer [2024-11-08 16:27:47,820 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:27:47,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:27:47,822 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:27:47,827 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:27:47,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:27:45" (1/3) ... [2024-11-08 16:27:47,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3d95da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:27:47, skipping insertion in model container [2024-11-08 16:27:47,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:27:46" (2/3) ... [2024-11-08 16:27:47,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3d95da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:27:47, skipping insertion in model container [2024-11-08 16:27:47,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:27:47" (3/3) ... [2024-11-08 16:27:47,832 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-11-08 16:27:47,852 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:27:47,852 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-08 16:27:47,852 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 16:27:47,958 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 16:27:48,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 94 transitions, 209 flow [2024-11-08 16:27:48,056 INFO L124 PetriNetUnfolderBase]: 16/91 cut-off events. [2024-11-08 16:27:48,057 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 16:27:48,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 91 events. 16/91 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 254 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-11-08 16:27:48,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 94 transitions, 209 flow [2024-11-08 16:27:48,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 90 transitions, 198 flow [2024-11-08 16:27:48,082 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:27:48,093 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;@503ab80e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:27:48,093 INFO L334 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-11-08 16:27:48,098 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:27:48,098 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 16:27:48,098 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:27:48,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:48,099 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:27:48,100 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:27:48,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:48,105 INFO L85 PathProgramCache]: Analyzing trace with hash 27087686, now seen corresponding path program 1 times [2024-11-08 16:27:48,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:48,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209440319] [2024-11-08 16:27:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:48,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:48,374 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 16:27:48,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:48,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209440319] [2024-11-08 16:27:48,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209440319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:27:48,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:27:48,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 16:27:48,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654243105] [2024-11-08 16:27:48,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:27:48,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:27:48,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:48,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:27:48,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:27:48,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 94 [2024-11-08 16:27:48,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 16:27:48,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:48,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 94 [2024-11-08 16:27:48,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:49,935 INFO L124 PetriNetUnfolderBase]: 4792/7222 cut-off events. [2024-11-08 16:27:49,935 INFO L125 PetriNetUnfolderBase]: For 330/330 co-relation queries the response was YES. [2024-11-08 16:27:49,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13939 conditions, 7222 events. 4792/7222 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 43781 event pairs, 3616 based on Foata normal form. 544/5541 useless extension candidates. Maximal degree in co-relation 13252. Up to 6434 conditions per place. [2024-11-08 16:27:50,010 INFO L140 encePairwiseOnDemand]: 86/94 looper letters, 45 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2024-11-08 16:27:50,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 83 transitions, 278 flow [2024-11-08 16:27:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:27:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:27:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-11-08 16:27:50,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6134751773049646 [2024-11-08 16:27:50,029 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 198 flow. Second operand 3 states and 173 transitions. [2024-11-08 16:27:50,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 83 transitions, 278 flow [2024-11-08 16:27:50,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 266 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 16:27:50,046 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 176 flow [2024-11-08 16:27:50,049 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2024-11-08 16:27:50,054 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -8 predicate places. [2024-11-08 16:27:50,054 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 176 flow [2024-11-08 16:27:50,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 16:27:50,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:50,055 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:27:50,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:27:50,056 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:27:50,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:50,058 INFO L85 PathProgramCache]: Analyzing trace with hash 27087687, now seen corresponding path program 1 times [2024-11-08 16:27:50,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:50,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854534043] [2024-11-08 16:27:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:50,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:50,605 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 16:27:50,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:50,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854534043] [2024-11-08 16:27:50,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854534043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:27:50,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:27:50,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:27:50,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269913030] [2024-11-08 16:27:50,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:27:50,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:27:50,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:50,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:27:50,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:27:50,723 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 94 [2024-11-08 16:27:50,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:50,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:50,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 94 [2024-11-08 16:27:50,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:51,996 INFO L124 PetriNetUnfolderBase]: 4791/7220 cut-off events. [2024-11-08 16:27:51,996 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-08 16:27:52,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13761 conditions, 7220 events. 4791/7220 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 43704 event pairs, 3616 based on Foata normal form. 0/4993 useless extension candidates. Maximal degree in co-relation 13730. Up to 6441 conditions per place. [2024-11-08 16:27:52,057 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 49 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2024-11-08 16:27:52,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 278 flow [2024-11-08 16:27:52,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:27:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:27:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-11-08 16:27:52,064 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5079787234042553 [2024-11-08 16:27:52,065 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 176 flow. Second operand 4 states and 191 transitions. [2024-11-08 16:27:52,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 278 flow [2024-11-08 16:27:52,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:27:52,069 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 176 flow [2024-11-08 16:27:52,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-11-08 16:27:52,071 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -8 predicate places. [2024-11-08 16:27:52,071 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 176 flow [2024-11-08 16:27:52,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:52,072 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:52,072 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 16:27:52,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 16:27:52,073 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:27:52,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:52,074 INFO L85 PathProgramCache]: Analyzing trace with hash 261170075, now seen corresponding path program 1 times [2024-11-08 16:27:52,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:52,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341518281] [2024-11-08 16:27:52,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:52,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:52,594 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 16:27:52,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:52,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341518281] [2024-11-08 16:27:52,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341518281] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:27:52,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:27:52,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:27:52,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339548169] [2024-11-08 16:27:52,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:27:52,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:27:52,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:52,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:27:52,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:27:52,794 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 94 [2024-11-08 16:27:52,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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 16:27:52,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:52,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 94 [2024-11-08 16:27:52,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:53,977 INFO L124 PetriNetUnfolderBase]: 4793/7230 cut-off events. [2024-11-08 16:27:53,978 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-08 16:27:53,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13786 conditions, 7230 events. 4793/7230 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 43783 event pairs, 3616 based on Foata normal form. 0/5003 useless extension candidates. Maximal degree in co-relation 13754. Up to 6446 conditions per place. [2024-11-08 16:27:54,035 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 56 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2024-11-08 16:27:54,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 91 transitions, 328 flow [2024-11-08 16:27:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:27:54,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:27:54,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2024-11-08 16:27:54,042 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-08 16:27:54,042 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 176 flow. Second operand 5 states and 235 transitions. [2024-11-08 16:27:54,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 91 transitions, 328 flow [2024-11-08 16:27:54,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 91 transitions, 314 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:27:54,049 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 223 flow [2024-11-08 16:27:54,049 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-11-08 16:27:54,051 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -4 predicate places. [2024-11-08 16:27:54,052 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 223 flow [2024-11-08 16:27:54,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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 16:27:54,052 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:54,053 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-08 16:27:54,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 16:27:54,053 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:27:54,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:54,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1962186754, now seen corresponding path program 1 times [2024-11-08 16:27:54,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:54,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583175638] [2024-11-08 16:27:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:54,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:54,580 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 16:27:54,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:54,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583175638] [2024-11-08 16:27:54,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583175638] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:54,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973198327] [2024-11-08 16:27:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:54,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:54,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:54,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:54,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:27:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:54,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 16:27:54,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:54,824 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 16:27:55,238 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 16:27:55,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:27:55,571 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 16:27:55,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973198327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:27:55,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:27:55,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 16:27:55,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544107212] [2024-11-08 16:27:55,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:27:55,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:27:55,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:55,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:27:55,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:27:56,428 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 94 [2024-11-08 16:27:56,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 223 flow. Second operand has 14 states, 14 states have (on average 35.785714285714285) internal successors, (501), 14 states have internal predecessors, (501), 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 16:27:56,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:56,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 94 [2024-11-08 16:27:56,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:58,027 INFO L124 PetriNetUnfolderBase]: 4794/7238 cut-off events. [2024-11-08 16:27:58,028 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-08 16:27:58,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13824 conditions, 7238 events. 4794/7238 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 43893 event pairs, 3616 based on Foata normal form. 2/5017 useless extension candidates. Maximal degree in co-relation 13744. Up to 6435 conditions per place. [2024-11-08 16:27:58,099 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 53 selfloop transitions, 18 changer transitions 0/99 dead transitions. [2024-11-08 16:27:58,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 99 transitions, 399 flow [2024-11-08 16:27:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:27:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 16:27:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 381 transitions. [2024-11-08 16:27:58,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.450354609929078 [2024-11-08 16:27:58,103 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 223 flow. Second operand 9 states and 381 transitions. [2024-11-08 16:27:58,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 99 transitions, 399 flow [2024-11-08 16:27:58,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 99 transitions, 398 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:27:58,108 INFO L231 Difference]: Finished difference. Result has 86 places, 91 transitions, 276 flow [2024-11-08 16:27:58,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=276, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2024-11-08 16:27:58,111 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 2 predicate places. [2024-11-08 16:27:58,112 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 276 flow [2024-11-08 16:27:58,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 35.785714285714285) internal successors, (501), 14 states have internal predecessors, (501), 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 16:27:58,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:58,113 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:58,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 16:27:58,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:58,314 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:27:58,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:58,315 INFO L85 PathProgramCache]: Analyzing trace with hash 159052253, now seen corresponding path program 1 times [2024-11-08 16:27:58,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:58,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323460397] [2024-11-08 16:27:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:58,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:58,409 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 16:27:58,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:58,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323460397] [2024-11-08 16:27:58,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323460397] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:27:58,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:27:58,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:27:58,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970027726] [2024-11-08 16:27:58,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:27:58,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:27:58,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:58,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:27:58,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:27:58,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 94 [2024-11-08 16:27:58,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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 16:27:58,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:58,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 94 [2024-11-08 16:27:58,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:59,390 INFO L124 PetriNetUnfolderBase]: 4794/7250 cut-off events. [2024-11-08 16:27:59,391 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-11-08 16:27:59,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13880 conditions, 7250 events. 4794/7250 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 43928 event pairs, 3616 based on Foata normal form. 3/5030 useless extension candidates. Maximal degree in co-relation 13750. Up to 6459 conditions per place. [2024-11-08 16:27:59,464 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 61 selfloop transitions, 2 changer transitions 11/102 dead transitions. [2024-11-08 16:27:59,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 102 transitions, 474 flow [2024-11-08 16:27:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:27:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:27:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-11-08 16:27:59,468 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5191489361702127 [2024-11-08 16:27:59,468 INFO L175 Difference]: Start difference. First operand has 86 places, 91 transitions, 276 flow. Second operand 5 states and 244 transitions. [2024-11-08 16:27:59,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 102 transitions, 474 flow [2024-11-08 16:27:59,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 102 transitions, 413 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-11-08 16:27:59,476 INFO L231 Difference]: Finished difference. Result has 87 places, 90 transitions, 250 flow [2024-11-08 16:27:59,478 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=87, PETRI_TRANSITIONS=90} [2024-11-08 16:27:59,479 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 3 predicate places. [2024-11-08 16:27:59,482 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 90 transitions, 250 flow [2024-11-08 16:27:59,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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 16:27:59,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:59,483 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:59,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 16:27:59,483 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:27:59,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1544848358, now seen corresponding path program 1 times [2024-11-08 16:27:59,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:59,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062051185] [2024-11-08 16:27:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:59,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:59,631 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 16:27:59,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:59,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062051185] [2024-11-08 16:27:59,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062051185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:27:59,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:27:59,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:27:59,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602963544] [2024-11-08 16:27:59,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:27:59,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:27:59,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:59,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:27:59,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:27:59,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 94 [2024-11-08 16:27:59,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 90 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 16:27:59,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:59,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 94 [2024-11-08 16:27:59,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:28:00,726 INFO L124 PetriNetUnfolderBase]: 6341/8908 cut-off events. [2024-11-08 16:28:00,726 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2024-11-08 16:28:00,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17703 conditions, 8908 events. 6341/8908 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 46280 event pairs, 4968 based on Foata normal form. 0/6766 useless extension candidates. Maximal degree in co-relation 17683. Up to 8629 conditions per place. [2024-11-08 16:28:00,807 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 51 selfloop transitions, 6 changer transitions 0/84 dead transitions. [2024-11-08 16:28:00,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 352 flow [2024-11-08 16:28:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:28:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:28:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-11-08 16:28:00,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44893617021276594 [2024-11-08 16:28:00,809 INFO L175 Difference]: Start difference. First operand has 87 places, 90 transitions, 250 flow. Second operand 5 states and 211 transitions. [2024-11-08 16:28:00,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 352 flow [2024-11-08 16:28:00,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 84 transitions, 329 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-08 16:28:00,813 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 227 flow [2024-11-08 16:28:00,814 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-11-08 16:28:00,814 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2024-11-08 16:28:00,815 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 227 flow [2024-11-08 16:28:00,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 16:28:00,815 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:28:00,816 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:00,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 16:28:00,816 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:28:00,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:00,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1544848359, now seen corresponding path program 1 times [2024-11-08 16:28:00,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:00,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006014589] [2024-11-08 16:28:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:00,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:01,194 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 16:28:01,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:01,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006014589] [2024-11-08 16:28:01,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006014589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:28:01,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306412816] [2024-11-08 16:28:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:01,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:01,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:28:01,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:28:01,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:28:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:01,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 16:28:01,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:28:01,329 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 16:28:01,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:28:01,438 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 16:28:01,459 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 16:28:01,460 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 16:28:01,562 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 16:28:01,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:28:01,770 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 52 treesize of output 48 [2024-11-08 16:28:01,902 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 16:28:01,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306412816] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:28:01,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:28:01,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 16:28:01,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493164859] [2024-11-08 16:28:01,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:28:01,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:28:01,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:01,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:28:01,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:28:03,402 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 94 [2024-11-08 16:28:03,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 227 flow. Second operand has 14 states, 14 states have (on average 38.642857142857146) internal successors, (541), 14 states have internal predecessors, (541), 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 16:28:03,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:28:03,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 94 [2024-11-08 16:28:03,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:28:05,602 INFO L124 PetriNetUnfolderBase]: 9973/14064 cut-off events. [2024-11-08 16:28:05,602 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-11-08 16:28:05,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27731 conditions, 14064 events. 9973/14064 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 81084 event pairs, 2233 based on Foata normal form. 0/10207 useless extension candidates. Maximal degree in co-relation 27692. Up to 5486 conditions per place. [2024-11-08 16:28:05,715 INFO L140 encePairwiseOnDemand]: 83/94 looper letters, 105 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2024-11-08 16:28:05,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 145 transitions, 589 flow [2024-11-08 16:28:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:28:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 16:28:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 450 transitions. [2024-11-08 16:28:05,718 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-11-08 16:28:05,718 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 227 flow. Second operand 9 states and 450 transitions. [2024-11-08 16:28:05,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 145 transitions, 589 flow [2024-11-08 16:28:05,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 145 transitions, 580 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:28:05,724 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 265 flow [2024-11-08 16:28:05,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=265, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-11-08 16:28:05,727 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2024-11-08 16:28:05,727 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 265 flow [2024-11-08 16:28:05,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.642857142857146) internal successors, (541), 14 states have internal predecessors, (541), 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 16:28:05,728 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:28:05,728 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:05,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 16:28:05,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-08 16:28:05,931 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:28:05,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:05,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2003798117, now seen corresponding path program 1 times [2024-11-08 16:28:05,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:05,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817723448] [2024-11-08 16:28:05,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:05,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:06,069 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 16:28:06,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:06,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817723448] [2024-11-08 16:28:06,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817723448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:28:06,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831331069] [2024-11-08 16:28:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:06,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:06,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:28:06,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:28:06,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:28:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:06,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:28:06,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:28:06,282 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 16:28:06,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:28:06,386 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 16:28:06,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831331069] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:28:06,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:28:06,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 16:28:06,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671774257] [2024-11-08 16:28:06,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:28:06,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:28:06,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:28:06,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:28:06,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 94 [2024-11-08 16:28:06,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 265 flow. Second operand has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 states have internal predecessors, (480), 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 16:28:06,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:28:06,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 94 [2024-11-08 16:28:06,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:28:08,916 INFO L124 PetriNetUnfolderBase]: 14974/21783 cut-off events. [2024-11-08 16:28:08,916 INFO L125 PetriNetUnfolderBase]: For 4729/4735 co-relation queries the response was YES. [2024-11-08 16:28:08,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45977 conditions, 21783 events. 14974/21783 cut-off events. For 4729/4735 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 139223 event pairs, 9157 based on Foata normal form. 0/15727 useless extension candidates. Maximal degree in co-relation 35194. Up to 13899 conditions per place. [2024-11-08 16:28:09,256 INFO L140 encePairwiseOnDemand]: 81/94 looper letters, 152 selfloop transitions, 21 changer transitions 0/190 dead transitions. [2024-11-08 16:28:09,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 190 transitions, 929 flow [2024-11-08 16:28:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:28:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 16:28:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 470 transitions. [2024-11-08 16:28:09,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-08 16:28:09,259 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 265 flow. Second operand 10 states and 470 transitions. [2024-11-08 16:28:09,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 190 transitions, 929 flow [2024-11-08 16:28:09,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 190 transitions, 923 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:28:09,267 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 422 flow [2024-11-08 16:28:09,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=422, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2024-11-08 16:28:09,268 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 13 predicate places. [2024-11-08 16:28:09,269 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 422 flow [2024-11-08 16:28:09,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.285714285714285) internal successors, (480), 14 states have internal predecessors, (480), 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 16:28:09,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:28:09,270 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:09,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:28:09,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:09,474 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:28:09,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:09,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2003813953, now seen corresponding path program 1 times [2024-11-08 16:28:09,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:09,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732473535] [2024-11-08 16:28:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:09,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:09,702 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 16:28:09,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:09,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732473535] [2024-11-08 16:28:09,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732473535] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:28:09,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:28:09,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:28:09,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340699647] [2024-11-08 16:28:09,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:28:09,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:28:09,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:09,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:28:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:28:09,742 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 94 [2024-11-08 16:28:09,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 422 flow. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 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 16:28:09,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:28:09,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 94 [2024-11-08 16:28:09,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:28:11,104 INFO L124 PetriNetUnfolderBase]: 8226/12665 cut-off events. [2024-11-08 16:28:11,105 INFO L125 PetriNetUnfolderBase]: For 5285/5285 co-relation queries the response was YES. [2024-11-08 16:28:11,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28201 conditions, 12665 events. 8226/12665 cut-off events. For 5285/5285 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 83230 event pairs, 5983 based on Foata normal form. 0/9900 useless extension candidates. Maximal degree in co-relation 28092. Up to 10895 conditions per place. [2024-11-08 16:28:11,208 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 55 selfloop transitions, 7 changer transitions 0/96 dead transitions. [2024-11-08 16:28:11,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 96 transitions, 540 flow [2024-11-08 16:28:11,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:28:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:28:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 207 transitions. [2024-11-08 16:28:11,210 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-11-08 16:28:11,210 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 422 flow. Second operand 4 states and 207 transitions. [2024-11-08 16:28:11,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 96 transitions, 540 flow [2024-11-08 16:28:11,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 96 transitions, 536 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-08 16:28:11,227 INFO L231 Difference]: Finished difference. Result has 96 places, 96 transitions, 426 flow [2024-11-08 16:28:11,227 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=426, PETRI_PLACES=96, PETRI_TRANSITIONS=96} [2024-11-08 16:28:11,228 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 12 predicate places. [2024-11-08 16:28:11,228 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 96 transitions, 426 flow [2024-11-08 16:28:11,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 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 16:28:11,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:28:11,229 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:11,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 16:28:11,229 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:28:11,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:11,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2003813954, now seen corresponding path program 1 times [2024-11-08 16:28:11,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:11,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465750450] [2024-11-08 16:28:11,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:11,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:11,533 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 16:28:11,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:11,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465750450] [2024-11-08 16:28:11,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465750450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:28:11,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:28:11,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:28:11,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037563271] [2024-11-08 16:28:11,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:28:11,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:28:11,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:11,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:28:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:28:11,723 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 94 [2024-11-08 16:28:11,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 96 transitions, 426 flow. Second operand has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 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 16:28:11,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:28:11,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 94 [2024-11-08 16:28:11,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:28:14,394 INFO L124 PetriNetUnfolderBase]: 14827/22094 cut-off events. [2024-11-08 16:28:14,394 INFO L125 PetriNetUnfolderBase]: For 9441/9629 co-relation queries the response was YES. [2024-11-08 16:28:14,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50645 conditions, 22094 events. 14827/22094 cut-off events. For 9441/9629 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 147038 event pairs, 8526 based on Foata normal form. 0/18227 useless extension candidates. Maximal degree in co-relation 36513. Up to 12341 conditions per place. [2024-11-08 16:28:14,572 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 144 selfloop transitions, 13 changer transitions 0/187 dead transitions. [2024-11-08 16:28:14,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 187 transitions, 993 flow [2024-11-08 16:28:14,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:28:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 16:28:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 391 transitions. [2024-11-08 16:28:14,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5942249240121581 [2024-11-08 16:28:14,574 INFO L175 Difference]: Start difference. First operand has 96 places, 96 transitions, 426 flow. Second operand 7 states and 391 transitions. [2024-11-08 16:28:14,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 187 transitions, 993 flow [2024-11-08 16:28:14,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 187 transitions, 985 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:28:14,602 INFO L231 Difference]: Finished difference. Result has 104 places, 103 transitions, 505 flow [2024-11-08 16:28:14,603 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=505, PETRI_PLACES=104, PETRI_TRANSITIONS=103} [2024-11-08 16:28:14,603 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 20 predicate places. [2024-11-08 16:28:14,605 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 103 transitions, 505 flow [2024-11-08 16:28:14,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 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 16:28:14,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:28:14,606 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:14,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 16:28:14,606 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:28:14,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:14,607 INFO L85 PathProgramCache]: Analyzing trace with hash -118274353, now seen corresponding path program 1 times [2024-11-08 16:28:14,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:14,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210889078] [2024-11-08 16:28:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:14,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:28:15,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:15,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210889078] [2024-11-08 16:28:15,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210889078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:28:15,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:28:15,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:28:15,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861155232] [2024-11-08 16:28:15,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:28:15,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 16:28:15,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 16:28:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:28:15,825 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 94 [2024-11-08 16:28:15,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 103 transitions, 505 flow. Second operand has 8 states, 8 states have (on average 32.75) internal successors, (262), 8 states have internal predecessors, (262), 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 16:28:15,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:28:15,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 94 [2024-11-08 16:28:15,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:28:19,585 INFO L124 PetriNetUnfolderBase]: 21013/31105 cut-off events. [2024-11-08 16:28:19,585 INFO L125 PetriNetUnfolderBase]: For 27527/28305 co-relation queries the response was YES. [2024-11-08 16:28:19,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77464 conditions, 31105 events. 21013/31105 cut-off events. For 27527/28305 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 216394 event pairs, 6020 based on Foata normal form. 506/26726 useless extension candidates. Maximal degree in co-relation 55971. Up to 16378 conditions per place. [2024-11-08 16:28:19,894 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 97 selfloop transitions, 13 changer transitions 0/137 dead transitions. [2024-11-08 16:28:19,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 137 transitions, 874 flow [2024-11-08 16:28:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:28:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:28:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 263 transitions. [2024-11-08 16:28:19,897 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46631205673758863 [2024-11-08 16:28:19,897 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 505 flow. Second operand 6 states and 263 transitions. [2024-11-08 16:28:19,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 137 transitions, 874 flow [2024-11-08 16:28:19,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 137 transitions, 864 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:28:19,946 INFO L231 Difference]: Finished difference. Result has 108 places, 104 transitions, 543 flow [2024-11-08 16:28:19,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=543, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2024-11-08 16:28:19,947 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 24 predicate places. [2024-11-08 16:28:19,948 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 543 flow [2024-11-08 16:28:19,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.75) internal successors, (262), 8 states have internal predecessors, (262), 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 16:28:19,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:28:19,948 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:19,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 16:28:19,949 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:28:19,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:19,949 INFO L85 PathProgramCache]: Analyzing trace with hash 545112882, now seen corresponding path program 2 times [2024-11-08 16:28:19,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:19,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58524927] [2024-11-08 16:28:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:19,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:28:20,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:20,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58524927] [2024-11-08 16:28:20,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58524927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:28:20,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921846772] [2024-11-08 16:28:20,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:28:20,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:20,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:28:20,459 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:28:20,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:28:20,575 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 16:28:20,576 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:28:20,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-08 16:28:20,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:28:20,610 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 16:28:20,626 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 16:28:20,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:28:20,821 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 16:28:20,833 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 16:28:20,834 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 16:28:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 16:28:21,048 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:28:21,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921846772] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:28:21,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:28:21,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-08 16:28:21,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165115328] [2024-11-08 16:28:21,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:28:21,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:28:21,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:21,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:28:21,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:28:21,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 94 [2024-11-08 16:28:21,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 543 flow. Second operand has 7 states, 7 states have (on average 37.714285714285715) internal successors, (264), 7 states have internal predecessors, (264), 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 16:28:21,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:28:21,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 94 [2024-11-08 16:28:21,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:28:26,942 INFO L124 PetriNetUnfolderBase]: 32099/47246 cut-off events. [2024-11-08 16:28:26,942 INFO L125 PetriNetUnfolderBase]: For 53303/55909 co-relation queries the response was YES. [2024-11-08 16:28:27,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128239 conditions, 47246 events. 32099/47246 cut-off events. For 53303/55909 co-relation queries the response was YES. Maximal size of possible extension queue 1390. Compared 334334 event pairs, 11790 based on Foata normal form. 1312/41034 useless extension candidates. Maximal degree in co-relation 110506. Up to 25970 conditions per place. [2024-11-08 16:28:27,333 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 132 selfloop transitions, 16 changer transitions 0/179 dead transitions. [2024-11-08 16:28:27,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 179 transitions, 1173 flow [2024-11-08 16:28:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:28:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 16:28:27,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 357 transitions. [2024-11-08 16:28:27,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-11-08 16:28:27,336 INFO L175 Difference]: Start difference. First operand has 108 places, 104 transitions, 543 flow. Second operand 7 states and 357 transitions. [2024-11-08 16:28:27,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 179 transitions, 1173 flow [2024-11-08 16:28:27,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 179 transitions, 1161 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:28:27,568 INFO L231 Difference]: Finished difference. Result has 113 places, 108 transitions, 597 flow [2024-11-08 16:28:27,569 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=597, PETRI_PLACES=113, PETRI_TRANSITIONS=108} [2024-11-08 16:28:27,569 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2024-11-08 16:28:27,570 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 108 transitions, 597 flow [2024-11-08 16:28:27,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.714285714285715) internal successors, (264), 7 states have internal predecessors, (264), 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 16:28:27,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:28:27,570 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:27,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 16:28:27,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:27,771 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:28:27,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:27,772 INFO L85 PathProgramCache]: Analyzing trace with hash -129096349, now seen corresponding path program 1 times [2024-11-08 16:28:27,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:27,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26935180] [2024-11-08 16:28:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:27,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:28:27,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:27,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26935180] [2024-11-08 16:28:27,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26935180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:28:27,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024392735] [2024-11-08 16:28:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:27,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:27,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:28:27,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:28:27,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:28:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:28,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:28:28,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:28:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:28:28,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:28:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:28:28,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024392735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:28:28,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:28:28,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 16:28:28,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131610521] [2024-11-08 16:28:28,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:28:28,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:28:28,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:28,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:28:28,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:28:28,607 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 94 [2024-11-08 16:28:28,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 108 transitions, 597 flow. Second operand has 14 states, 14 states have (on average 34.857142857142854) internal successors, (488), 14 states have internal predecessors, (488), 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 16:28:28,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:28:28,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 94 [2024-11-08 16:28:28,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:28:36,080 INFO L124 PetriNetUnfolderBase]: 35756/53743 cut-off events. [2024-11-08 16:28:36,081 INFO L125 PetriNetUnfolderBase]: For 60082/67342 co-relation queries the response was YES. [2024-11-08 16:28:36,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141726 conditions, 53743 events. 35756/53743 cut-off events. For 60082/67342 co-relation queries the response was YES. Maximal size of possible extension queue 1493. Compared 398203 event pairs, 20134 based on Foata normal form. 396/42867 useless extension candidates. Maximal degree in co-relation 124015. Up to 35252 conditions per place. [2024-11-08 16:28:36,556 INFO L140 encePairwiseOnDemand]: 81/94 looper letters, 191 selfloop transitions, 24 changer transitions 0/234 dead transitions. [2024-11-08 16:28:36,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 234 transitions, 1509 flow [2024-11-08 16:28:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:28:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 16:28:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 525 transitions. [2024-11-08 16:28:36,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5077369439071566 [2024-11-08 16:28:36,559 INFO L175 Difference]: Start difference. First operand has 113 places, 108 transitions, 597 flow. Second operand 11 states and 525 transitions. [2024-11-08 16:28:36,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 234 transitions, 1509 flow [2024-11-08 16:28:36,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 234 transitions, 1495 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-08 16:28:36,704 INFO L231 Difference]: Finished difference. Result has 123 places, 116 transitions, 693 flow [2024-11-08 16:28:36,704 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=693, PETRI_PLACES=123, PETRI_TRANSITIONS=116} [2024-11-08 16:28:36,705 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 39 predicate places. [2024-11-08 16:28:36,705 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 116 transitions, 693 flow [2024-11-08 16:28:36,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.857142857142854) internal successors, (488), 14 states have internal predecessors, (488), 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 16:28:36,706 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:28:36,706 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:36,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 16:28:36,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:36,907 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:28:36,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash 591937137, now seen corresponding path program 1 times [2024-11-08 16:28:36,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:36,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511806968] [2024-11-08 16:28:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:36,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:37,098 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 16:28:37,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511806968] [2024-11-08 16:28:37,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511806968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:28:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900191755] [2024-11-08 16:28:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:37,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:37,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:28:37,101 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:28:37,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:28:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:37,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 16:28:37,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:28:37,299 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 23 treesize of output 7 [2024-11-08 16:28:37,319 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 16:28:37,319 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:28:37,357 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 25 treesize of output 9 [2024-11-08 16:28:37,435 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 16:28:37,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900191755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:28:37,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:28:37,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-08 16:28:37,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035396180] [2024-11-08 16:28:37,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:28:37,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 16:28:37,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:37,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 16:28:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-08 16:28:37,803 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 94 [2024-11-08 16:28:37,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 116 transitions, 693 flow. Second operand has 15 states, 15 states have (on average 37.2) internal successors, (558), 15 states have internal predecessors, (558), 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 16:28:37,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:28:37,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 94 [2024-11-08 16:28:37,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:28:45,702 INFO L124 PetriNetUnfolderBase]: 36842/55604 cut-off events. [2024-11-08 16:28:45,702 INFO L125 PetriNetUnfolderBase]: For 79369/85817 co-relation queries the response was YES. [2024-11-08 16:28:46,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161519 conditions, 55604 events. 36842/55604 cut-off events. For 79369/85817 co-relation queries the response was YES. Maximal size of possible extension queue 1475. Compared 411153 event pairs, 17409 based on Foata normal form. 124/47385 useless extension candidates. Maximal degree in co-relation 140571. Up to 21215 conditions per place. [2024-11-08 16:28:46,611 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 167 selfloop transitions, 36 changer transitions 0/227 dead transitions. [2024-11-08 16:28:46,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 227 transitions, 1589 flow [2024-11-08 16:28:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:28:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 16:28:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 490 transitions. [2024-11-08 16:28:46,614 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-11-08 16:28:46,614 INFO L175 Difference]: Start difference. First operand has 123 places, 116 transitions, 693 flow. Second operand 10 states and 490 transitions. [2024-11-08 16:28:46,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 227 transitions, 1589 flow [2024-11-08 16:28:47,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 227 transitions, 1570 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-08 16:28:47,206 INFO L231 Difference]: Finished difference. Result has 132 places, 124 transitions, 857 flow [2024-11-08 16:28:47,206 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=857, PETRI_PLACES=132, PETRI_TRANSITIONS=124} [2024-11-08 16:28:47,207 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 48 predicate places. [2024-11-08 16:28:47,207 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 124 transitions, 857 flow [2024-11-08 16:28:47,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 37.2) internal successors, (558), 15 states have internal predecessors, (558), 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 16:28:47,208 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:28:47,208 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:47,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 16:28:47,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_761c0114-07e2-46d1-b9fd-1cb3eb525fb1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 16:28:47,409 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-08 16:28:47,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:47,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1637100158, now seen corresponding path program 1 times [2024-11-08 16:28:47,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:47,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468832254] [2024-11-08 16:28:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:47,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:47,604 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 16:28:47,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:47,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468832254] [2024-11-08 16:28:47,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468832254] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:28:47,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:28:47,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:28:47,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730170376] [2024-11-08 16:28:47,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:28:47,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:28:47,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:47,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:28:47,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:28:47,794 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 94 [2024-11-08 16:28:47,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 124 transitions, 857 flow. Second operand has 6 states, 6 states have (on average 39.833333333333336) internal successors, (239), 6 states have internal predecessors, (239), 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 16:28:47,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:28:47,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 94 [2024-11-08 16:28:47,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:28:55,186 INFO L124 PetriNetUnfolderBase]: 32007/50227 cut-off events. [2024-11-08 16:28:55,187 INFO L125 PetriNetUnfolderBase]: For 112894/119790 co-relation queries the response was YES. [2024-11-08 16:28:55,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154556 conditions, 50227 events. 32007/50227 cut-off events. For 112894/119790 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 391257 event pairs, 20199 based on Foata normal form. 1554/44862 useless extension candidates. Maximal degree in co-relation 134633. Up to 32578 conditions per place.