./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/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_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/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_65e1112f-54c8-46be-bc26-28af6ba6bfc8/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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:26:35,188 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:26:35,259 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:26:35,264 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:26:35,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:26:35,300 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:26:35,301 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:26:35,301 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:26:35,302 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:26:35,302 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:26:35,303 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:26:35,303 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:26:35,304 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:26:35,304 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:26:35,305 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:26:35,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:26:35,306 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:26:35,306 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:26:35,307 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:26:35,307 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:26:35,307 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:26:35,308 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:26:35,308 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:26:35,309 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:26:35,309 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:26:35,310 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:26:35,310 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:26:35,310 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:26:35,311 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:26:35,311 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:26:35,312 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:26:35,312 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:26:35,312 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:26:35,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:26:35,313 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:26:35,313 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:26:35,314 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:26:35,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:26:35,315 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:26:35,315 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:26:35,315 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:26:35,316 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:26:35,316 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_65e1112f-54c8-46be-bc26-28af6ba6bfc8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-11-08 16:26:35,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:26:35,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:26:35,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:26:35,638 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:26:35,638 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:26:35,640 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c Unable to find full path for "g++" [2024-11-08 16:26:37,819 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:26:38,057 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:26:38,057 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-08 16:26:38,070 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/data/7d9ec3529/10ab170baaf94639984ed9f7c15d88a5/FLAG065caa3c8 [2024-11-08 16:26:38,088 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/data/7d9ec3529/10ab170baaf94639984ed9f7c15d88a5 [2024-11-08 16:26:38,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:26:38,093 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:26:38,095 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:26:38,095 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:26:38,101 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:26:38,101 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af6b3f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38, skipping insertion in model container [2024-11-08 16:26:38,103 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,133 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:26:38,382 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 16:26:38,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:26:38,404 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:26:38,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:26:38,450 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:26:38,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38 WrapperNode [2024-11-08 16:26:38,450 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:26:38,452 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:26:38,452 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:26:38,452 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:26:38,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,469 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,499 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 220 [2024-11-08 16:26:38,500 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:26:38,501 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:26:38,501 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:26:38,501 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:26:38,517 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,525 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,560 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-08 16:26:38,561 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,564 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,578 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,587 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,588 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,594 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:26:38,595 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:26:38,595 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:26:38,602 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:26:38,603 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (1/1) ... [2024-11-08 16:26:38,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:26:38,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:26:38,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:26:38,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:26:38,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:26:38,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 16:26:38,690 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 16:26:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 16:26:38,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 16:26:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 16:26:38,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 16:26:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 16:26:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 16:26:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:26:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 16:26:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 16:26:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 16:26:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 16:26:38,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:26:38,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:26:38,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:26:38,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 16:26:38,697 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 16:26:38,839 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:26:38,841 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:26:39,500 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 16:26:39,500 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:26:39,948 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:26:39,949 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 16:26:39,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:26:39 BoogieIcfgContainer [2024-11-08 16:26:39,950 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:26:39,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:26:39,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:26:39,958 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:26:39,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:26:38" (1/3) ... [2024-11-08 16:26:39,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d93a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:26:39, skipping insertion in model container [2024-11-08 16:26:39,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:26:38" (2/3) ... [2024-11-08 16:26:39,961 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d93a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:26:39, skipping insertion in model container [2024-11-08 16:26:39,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:26:39" (3/3) ... [2024-11-08 16:26:39,964 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-11-08 16:26:39,988 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:26:39,988 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-08 16:26:39,988 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 16:26:40,091 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 16:26:40,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 107 transitions, 235 flow [2024-11-08 16:26:40,200 INFO L124 PetriNetUnfolderBase]: 15/104 cut-off events. [2024-11-08 16:26:40,200 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 16:26:40,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 15/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 288 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2024-11-08 16:26:40,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 107 transitions, 235 flow [2024-11-08 16:26:40,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 103 transitions, 224 flow [2024-11-08 16:26:40,232 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:26:40,241 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;@162a88ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:26:40,242 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-11-08 16:26:40,246 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:26:40,246 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 16:26:40,247 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:26:40,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:26:40,248 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:26:40,248 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:26:40,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:26:40,254 INFO L85 PathProgramCache]: Analyzing trace with hash 28011397, now seen corresponding path program 1 times [2024-11-08 16:26:40,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:26:40,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974946323] [2024-11-08 16:26:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:40,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:26:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:40,564 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 16:26:40,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:26:40,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974946323] [2024-11-08 16:26:40,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974946323] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:26:40,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:26:40,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 16:26:40,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345048890] [2024-11-08 16:26:40,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:26:40,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:26:40,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:40,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:26:40,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:26:40,711 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2024-11-08 16:26:40,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 16:26:40,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:26:40,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2024-11-08 16:26:40,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:26:41,649 INFO L124 PetriNetUnfolderBase]: 3116/5113 cut-off events. [2024-11-08 16:26:41,649 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2024-11-08 16:26:41,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9233 conditions, 5113 events. 3116/5113 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35799 event pairs, 2134 based on Foata normal form. 1/3389 useless extension candidates. Maximal degree in co-relation 8688. Up to 3883 conditions per place. [2024-11-08 16:26:41,699 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 46 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-11-08 16:26:41,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 306 flow [2024-11-08 16:26:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:26:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:26:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2024-11-08 16:26:41,713 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6542056074766355 [2024-11-08 16:26:41,715 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 224 flow. Second operand 3 states and 210 transitions. [2024-11-08 16:26:41,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 306 flow [2024-11-08 16:26:41,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 96 transitions, 294 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 16:26:41,724 INFO L231 Difference]: Finished difference. Result has 87 places, 96 transitions, 202 flow [2024-11-08 16:26:41,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=87, PETRI_TRANSITIONS=96} [2024-11-08 16:26:41,729 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, -11 predicate places. [2024-11-08 16:26:41,730 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 96 transitions, 202 flow [2024-11-08 16:26:41,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 16:26:41,730 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:26:41,731 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:26:41,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:26:41,731 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:26:41,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:26:41,732 INFO L85 PathProgramCache]: Analyzing trace with hash 28011398, now seen corresponding path program 1 times [2024-11-08 16:26:41,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:26:41,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974474439] [2024-11-08 16:26:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:41,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:26:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:42,210 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 16:26:42,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:26:42,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974474439] [2024-11-08 16:26:42,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974474439] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:26:42,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:26:42,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:26:42,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182163584] [2024-11-08 16:26:42,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:26:42,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:26:42,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:26:42,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:26:42,341 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 107 [2024-11-08 16:26:42,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 96 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:42,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:26:42,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 107 [2024-11-08 16:26:42,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:26:43,157 INFO L124 PetriNetUnfolderBase]: 3116/5116 cut-off events. [2024-11-08 16:26:43,158 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-08 16:26:43,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9101 conditions, 5116 events. 3116/5116 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35740 event pairs, 2134 based on Foata normal form. 1/3389 useless extension candidates. Maximal degree in co-relation 9050. Up to 3901 conditions per place. [2024-11-08 16:26:43,243 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 57 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2024-11-08 16:26:43,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 98 transitions, 324 flow [2024-11-08 16:26:43,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:26:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:26:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-11-08 16:26:43,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6230529595015576 [2024-11-08 16:26:43,250 INFO L175 Difference]: Start difference. First operand has 87 places, 96 transitions, 202 flow. Second operand 3 states and 200 transitions. [2024-11-08 16:26:43,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 98 transitions, 324 flow [2024-11-08 16:26:43,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 98 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:26:43,255 INFO L231 Difference]: Finished difference. Result has 88 places, 97 transitions, 214 flow [2024-11-08 16:26:43,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=88, PETRI_TRANSITIONS=97} [2024-11-08 16:26:43,256 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, -10 predicate places. [2024-11-08 16:26:43,257 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 97 transitions, 214 flow [2024-11-08 16:26:43,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:43,257 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:26:43,257 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 16:26:43,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 16:26:43,258 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:26:43,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:26:43,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1264803982, now seen corresponding path program 1 times [2024-11-08 16:26:43,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:26:43,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235202656] [2024-11-08 16:26:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:43,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:26:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:43,714 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 16:26:43,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:26:43,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235202656] [2024-11-08 16:26:43,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235202656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:26:43,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212577031] [2024-11-08 16:26:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:43,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:26:43,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:26:43,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:26:43,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:26:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:43,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 16:26:43,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:26:43,905 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 16:26:44,238 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 16:26:44,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:26:44,404 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 16:26:44,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212577031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:26:44,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:26:44,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 16:26:44,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418456419] [2024-11-08 16:26:44,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:26:44,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 16:26:44,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 16:26:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:26:45,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 107 [2024-11-08 16:26:45,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 97 transitions, 214 flow. Second operand has 12 states, 12 states have (on average 44.75) internal successors, (537), 12 states have internal predecessors, (537), 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 16:26:45,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:26:45,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 107 [2024-11-08 16:26:45,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:26:46,356 INFO L124 PetriNetUnfolderBase]: 3117/5121 cut-off events. [2024-11-08 16:26:46,357 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-08 16:26:46,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9122 conditions, 5121 events. 3117/5121 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35844 event pairs, 2134 based on Foata normal form. 1/3394 useless extension candidates. Maximal degree in co-relation 9107. Up to 3895 conditions per place. [2024-11-08 16:26:46,404 INFO L140 encePairwiseOnDemand]: 95/107 looper letters, 53 selfloop transitions, 15 changer transitions 0/104 dead transitions. [2024-11-08 16:26:46,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 104 transitions, 366 flow [2024-11-08 16:26:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:26:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 16:26:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 415 transitions. [2024-11-08 16:26:46,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4848130841121495 [2024-11-08 16:26:46,408 INFO L175 Difference]: Start difference. First operand has 88 places, 97 transitions, 214 flow. Second operand 8 states and 415 transitions. [2024-11-08 16:26:46,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 104 transitions, 366 flow [2024-11-08 16:26:46,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 104 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:26:46,411 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 256 flow [2024-11-08 16:26:46,412 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=256, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-11-08 16:26:46,413 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, -4 predicate places. [2024-11-08 16:26:46,413 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 256 flow [2024-11-08 16:26:46,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 44.75) internal successors, (537), 12 states have internal predecessors, (537), 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 16:26:46,414 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:26:46,414 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:26:46,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 16:26:46,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-08 16:26:46,620 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:26:46,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:26:46,621 INFO L85 PathProgramCache]: Analyzing trace with hash -879472, now seen corresponding path program 1 times [2024-11-08 16:26:46,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:26:46,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882194234] [2024-11-08 16:26:46,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:46,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:26:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:46,950 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 16:26:46,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:26:46,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882194234] [2024-11-08 16:26:46,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882194234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:26:46,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338696537] [2024-11-08 16:26:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:46,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:26:46,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:26:46,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:26:46,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:26:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:47,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 16:26:47,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:26:47,075 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 16:26:47,261 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 16:26:47,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-08 16:26:47,311 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 16:26:47,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:26:47,443 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 16:26:47,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338696537] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:26:47,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:26:47,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-08 16:26:47,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548635343] [2024-11-08 16:26:47,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:26:47,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:26:47,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:26:47,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:26:47,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2024-11-08 16:26:47,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 256 flow. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 16:26:47,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:26:47,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2024-11-08 16:26:47,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:26:48,460 INFO L124 PetriNetUnfolderBase]: 3121/5133 cut-off events. [2024-11-08 16:26:48,460 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-11-08 16:26:48,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9152 conditions, 5133 events. 3121/5133 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35859 event pairs, 2134 based on Foata normal form. 0/3409 useless extension candidates. Maximal degree in co-relation 9119. Up to 3896 conditions per place. [2024-11-08 16:26:48,499 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 52 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2024-11-08 16:26:48,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 108 transitions, 396 flow [2024-11-08 16:26:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:26:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:26:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 268 transitions. [2024-11-08 16:26:48,501 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6261682242990654 [2024-11-08 16:26:48,501 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 256 flow. Second operand 4 states and 268 transitions. [2024-11-08 16:26:48,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 108 transitions, 396 flow [2024-11-08 16:26:48,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 108 transitions, 372 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-08 16:26:48,507 INFO L231 Difference]: Finished difference. Result has 96 places, 105 transitions, 291 flow [2024-11-08 16:26:48,507 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=291, PETRI_PLACES=96, PETRI_TRANSITIONS=105} [2024-11-08 16:26:48,508 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, -2 predicate places. [2024-11-08 16:26:48,509 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 105 transitions, 291 flow [2024-11-08 16:26:48,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 16:26:48,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:26:48,510 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:26:48,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 16:26:48,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:26:48,716 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:26:48,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:26:48,716 INFO L85 PathProgramCache]: Analyzing trace with hash -845917131, now seen corresponding path program 1 times [2024-11-08 16:26:48,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:26:48,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643480050] [2024-11-08 16:26:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:48,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:26:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:48,830 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 16:26:48,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:26:48,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643480050] [2024-11-08 16:26:48,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643480050] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:26:48,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:26:48,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:26:48,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32599410] [2024-11-08 16:26:48,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:26:48,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:26:48,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:26:48,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:26:48,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 107 [2024-11-08 16:26:48,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 105 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 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 16:26:48,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:26:48,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 107 [2024-11-08 16:26:48,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:26:49,591 INFO L124 PetriNetUnfolderBase]: 3117/5127 cut-off events. [2024-11-08 16:26:49,592 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-08 16:26:49,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9154 conditions, 5127 events. 3117/5127 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35833 event pairs, 2134 based on Foata normal form. 2/3405 useless extension candidates. Maximal degree in co-relation 9116. Up to 3900 conditions per place. [2024-11-08 16:26:49,626 INFO L140 encePairwiseOnDemand]: 97/107 looper letters, 55 selfloop transitions, 8 changer transitions 0/106 dead transitions. [2024-11-08 16:26:49,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 106 transitions, 413 flow [2024-11-08 16:26:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:26:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:26:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 260 transitions. [2024-11-08 16:26:49,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6074766355140186 [2024-11-08 16:26:49,628 INFO L175 Difference]: Start difference. First operand has 96 places, 105 transitions, 291 flow. Second operand 4 states and 260 transitions. [2024-11-08 16:26:49,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 106 transitions, 413 flow [2024-11-08 16:26:49,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 106 transitions, 396 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-08 16:26:49,634 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 296 flow [2024-11-08 16:26:49,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-11-08 16:26:49,635 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, -1 predicate places. [2024-11-08 16:26:49,637 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 296 flow [2024-11-08 16:26:49,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 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 16:26:49,637 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:26:49,637 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:26:49,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 16:26:49,638 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:26:49,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:26:49,638 INFO L85 PathProgramCache]: Analyzing trace with hash -429612377, now seen corresponding path program 1 times [2024-11-08 16:26:49,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:26:49,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048170988] [2024-11-08 16:26:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:49,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:26:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:49,793 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 16:26:49,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:26:49,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048170988] [2024-11-08 16:26:49,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048170988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:26:49,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097132642] [2024-11-08 16:26:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:49,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:26:49,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:26:49,798 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:26:49,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:26:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:49,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 16:26:49,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:26:49,995 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 16:26:49,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:26:50,086 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 16:26:50,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097132642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:26:50,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:26:50,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 16:26:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987500441] [2024-11-08 16:26:50,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:26:50,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:26:50,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:50,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:26:50,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:26:50,475 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 107 [2024-11-08 16:26:50,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 296 flow. Second operand has 14 states, 14 states have (on average 48.142857142857146) internal successors, (674), 14 states have internal predecessors, (674), 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 16:26:50,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:26:50,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 107 [2024-11-08 16:26:50,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:26:52,283 INFO L124 PetriNetUnfolderBase]: 6230/10244 cut-off events. [2024-11-08 16:26:52,284 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2024-11-08 16:26:52,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18290 conditions, 10244 events. 6230/10244 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 74760 event pairs, 4268 based on Foata normal form. 2/6827 useless extension candidates. Maximal degree in co-relation 9162. Up to 3889 conditions per place. [2024-11-08 16:26:52,366 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 97 selfloop transitions, 37 changer transitions 0/172 dead transitions. [2024-11-08 16:26:52,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 172 transitions, 751 flow [2024-11-08 16:26:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:26:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 16:26:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 642 transitions. [2024-11-08 16:26:52,370 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-08 16:26:52,370 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 296 flow. Second operand 11 states and 642 transitions. [2024-11-08 16:26:52,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 172 transitions, 751 flow [2024-11-08 16:26:52,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 172 transitions, 725 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:26:52,377 INFO L231 Difference]: Finished difference. Result has 106 places, 122 transitions, 455 flow [2024-11-08 16:26:52,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=455, PETRI_PLACES=106, PETRI_TRANSITIONS=122} [2024-11-08 16:26:52,378 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 8 predicate places. [2024-11-08 16:26:52,378 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 122 transitions, 455 flow [2024-11-08 16:26:52,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.142857142857146) internal successors, (674), 14 states have internal predecessors, (674), 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 16:26:52,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:26:52,382 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-08 16:26:52,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:26:52,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:26:52,583 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:26:52,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:26:52,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1451552849, now seen corresponding path program 2 times [2024-11-08 16:26:52,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:26:52,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761510752] [2024-11-08 16:26:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:26:52,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:26:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:26:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:52,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:26:52,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761510752] [2024-11-08 16:26:52,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761510752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:26:52,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935577135] [2024-11-08 16:26:52,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:26:52,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:26:52,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:26:52,991 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:26:52,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:26:53,087 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:26:53,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:26:53,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 16:26:53,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:26:53,111 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 16:26:53,318 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 16:26:53,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-08 16:26:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:53,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:26:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:53,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935577135] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:26:53,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:26:53,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-08 16:26:53,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104854072] [2024-11-08 16:26:53,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:26:53,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 16:26:53,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:53,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 16:26:53,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-08 16:26:56,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 107 [2024-11-08 16:26:56,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 122 transitions, 455 flow. Second operand has 20 states, 20 states have (on average 45.25) internal successors, (905), 20 states have internal predecessors, (905), 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 16:26:56,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:26:56,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 107 [2024-11-08 16:26:56,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:00,622 INFO L124 PetriNetUnfolderBase]: 15557/25566 cut-off events. [2024-11-08 16:27:00,622 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2024-11-08 16:27:00,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45673 conditions, 25566 events. 15557/25566 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 206196 event pairs, 10670 based on Foata normal form. 18/17074 useless extension candidates. Maximal degree in co-relation 36500. Up to 7784 conditions per place. [2024-11-08 16:27:00,843 INFO L140 encePairwiseOnDemand]: 89/107 looper letters, 171 selfloop transitions, 34 changer transitions 12/253 dead transitions. [2024-11-08 16:27:00,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 253 transitions, 1334 flow [2024-11-08 16:27:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 16:27:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 16:27:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 866 transitions. [2024-11-08 16:27:00,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5395638629283489 [2024-11-08 16:27:00,846 INFO L175 Difference]: Start difference. First operand has 106 places, 122 transitions, 455 flow. Second operand 15 states and 866 transitions. [2024-11-08 16:27:00,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 253 transitions, 1334 flow [2024-11-08 16:27:00,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 253 transitions, 1236 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-11-08 16:27:00,853 INFO L231 Difference]: Finished difference. Result has 121 places, 131 transitions, 595 flow [2024-11-08 16:27:00,854 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=595, PETRI_PLACES=121, PETRI_TRANSITIONS=131} [2024-11-08 16:27:00,854 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 23 predicate places. [2024-11-08 16:27:00,855 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 131 transitions, 595 flow [2024-11-08 16:27:00,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 45.25) internal successors, (905), 20 states have internal predecessors, (905), 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 16:27:00,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:00,856 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 16:27:00,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 16:27:01,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:01,057 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:27:01,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:01,058 INFO L85 PathProgramCache]: Analyzing trace with hash -545846105, now seen corresponding path program 1 times [2024-11-08 16:27:01,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:01,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960009871] [2024-11-08 16:27:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:01,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:01,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:01,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960009871] [2024-11-08 16:27:01,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960009871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:27:01,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:27:01,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:27:01,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893763773] [2024-11-08 16:27:01,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:27:01,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:27:01,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:27:01,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:27:01,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 107 [2024-11-08 16:27:01,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 131 transitions, 595 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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 16:27:01,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:01,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 107 [2024-11-08 16:27:01,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:04,808 INFO L124 PetriNetUnfolderBase]: 15712/26661 cut-off events. [2024-11-08 16:27:04,808 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-11-08 16:27:04,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47009 conditions, 26661 events. 15712/26661 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 222767 event pairs, 10940 based on Foata normal form. 0/17906 useless extension candidates. Maximal degree in co-relation 37626. Up to 19680 conditions per place. [2024-11-08 16:27:05,057 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 65 selfloop transitions, 9 changer transitions 0/126 dead transitions. [2024-11-08 16:27:05,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 126 transitions, 733 flow [2024-11-08 16:27:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:27:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:27:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 284 transitions. [2024-11-08 16:27:05,060 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5308411214953271 [2024-11-08 16:27:05,060 INFO L175 Difference]: Start difference. First operand has 121 places, 131 transitions, 595 flow. Second operand 5 states and 284 transitions. [2024-11-08 16:27:05,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 126 transitions, 733 flow [2024-11-08 16:27:05,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 126 transitions, 698 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-08 16:27:05,065 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 568 flow [2024-11-08 16:27:05,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=568, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-11-08 16:27:05,068 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 16 predicate places. [2024-11-08 16:27:05,068 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 568 flow [2024-11-08 16:27:05,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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 16:27:05,069 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:05,070 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 16:27:05,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 16:27:05,070 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:27:05,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:05,070 INFO L85 PathProgramCache]: Analyzing trace with hash -545846104, now seen corresponding path program 1 times [2024-11-08 16:27:05,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:05,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331232744] [2024-11-08 16:27:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:05,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:27:05,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:05,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331232744] [2024-11-08 16:27:05,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331232744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:05,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590866379] [2024-11-08 16:27:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:05,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:05,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:05,790 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:05,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:27:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:05,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-08 16:27:05,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:05,908 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 16:27:05,912 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 16:27:06,012 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 16:27:06,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-08 16:27:06,042 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 16:27:06,043 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 16:27:06,266 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-08 16:27:06,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-08 16:27:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:06,739 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:27:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:07,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590866379] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:07,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:27:07,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 14 [2024-11-08 16:27:07,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745515988] [2024-11-08 16:27:07,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:27:07,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:27:07,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:07,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:27:07,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-11-08 16:27:07,987 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2024-11-08 16:27:07,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 568 flow. Second operand has 6 states, 6 states have (on average 53.833333333333336) internal successors, (323), 6 states have internal predecessors, (323), 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 16:27:07,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:07,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2024-11-08 16:27:07,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:10,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 16:27:13,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 16:27:15,229 INFO L124 PetriNetUnfolderBase]: 14022/23036 cut-off events. [2024-11-08 16:27:15,229 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2024-11-08 16:27:15,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41146 conditions, 23036 events. 14022/23036 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 1055. Compared 184974 event pairs, 9560 based on Foata normal form. 0/15481 useless extension candidates. Maximal degree in co-relation 32933. Up to 17500 conditions per place. [2024-11-08 16:27:15,389 INFO L140 encePairwiseOnDemand]: 101/107 looper letters, 62 selfloop transitions, 12 changer transitions 0/125 dead transitions. [2024-11-08 16:27:15,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 125 transitions, 714 flow [2024-11-08 16:27:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:27:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:27:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 364 transitions. [2024-11-08 16:27:15,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5669781931464174 [2024-11-08 16:27:15,392 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 568 flow. Second operand 6 states and 364 transitions. [2024-11-08 16:27:15,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 125 transitions, 714 flow [2024-11-08 16:27:15,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 125 transitions, 701 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:27:15,396 INFO L231 Difference]: Finished difference. Result has 114 places, 124 transitions, 575 flow [2024-11-08 16:27:15,397 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=114, PETRI_TRANSITIONS=124} [2024-11-08 16:27:15,398 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 16 predicate places. [2024-11-08 16:27:15,398 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 124 transitions, 575 flow [2024-11-08 16:27:15,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.833333333333336) internal successors, (323), 6 states have internal predecessors, (323), 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 16:27:15,398 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:15,398 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-08 16:27:15,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 16:27:15,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:15,603 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:27:15,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:15,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1479254232, now seen corresponding path program 3 times [2024-11-08 16:27:15,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:15,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618952088] [2024-11-08 16:27:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:15,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:27:15,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618952088] [2024-11-08 16:27:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618952088] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040328466] [2024-11-08 16:27:15,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:27:15,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:15,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:15,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:15,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:27:16,022 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 16:27:16,022 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:27:16,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 16:27:16,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:16,037 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 16:27:16,253 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2024-11-08 16:27:16,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2024-11-08 16:27:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:27:16,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:27:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:27:16,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040328466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:27:16,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:27:16,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-08 16:27:16,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404519374] [2024-11-08 16:27:16,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:27:16,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 16:27:16,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:16,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 16:27:16,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-08 16:27:18,795 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 107 [2024-11-08 16:27:18,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 124 transitions, 575 flow. Second operand has 21 states, 21 states have (on average 45.19047619047619) internal successors, (949), 21 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:18,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:18,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 107 [2024-11-08 16:27:18,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:23,362 INFO L124 PetriNetUnfolderBase]: 14020/23024 cut-off events. [2024-11-08 16:27:23,362 INFO L125 PetriNetUnfolderBase]: For 347/347 co-relation queries the response was YES. [2024-11-08 16:27:23,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41130 conditions, 23024 events. 14020/23024 cut-off events. For 347/347 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 183984 event pairs, 9560 based on Foata normal form. 6/15500 useless extension candidates. Maximal degree in co-relation 32950. Up to 13996 conditions per place. [2024-11-08 16:27:23,514 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 97 selfloop transitions, 56 changer transitions 0/183 dead transitions. [2024-11-08 16:27:23,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 183 transitions, 1018 flow [2024-11-08 16:27:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 16:27:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-08 16:27:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1148 transitions. [2024-11-08 16:27:23,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46647704185290534 [2024-11-08 16:27:23,518 INFO L175 Difference]: Start difference. First operand has 114 places, 124 transitions, 575 flow. Second operand 23 states and 1148 transitions. [2024-11-08 16:27:23,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 183 transitions, 1018 flow [2024-11-08 16:27:23,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 183 transitions, 973 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-08 16:27:23,524 INFO L231 Difference]: Finished difference. Result has 127 places, 131 transitions, 685 flow [2024-11-08 16:27:23,524 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=685, PETRI_PLACES=127, PETRI_TRANSITIONS=131} [2024-11-08 16:27:23,525 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 29 predicate places. [2024-11-08 16:27:23,525 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 131 transitions, 685 flow [2024-11-08 16:27:23,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 45.19047619047619) internal successors, (949), 21 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:27:23,526 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:23,526 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:23,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 16:27:23,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:23,732 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:27:23,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:23,733 INFO L85 PathProgramCache]: Analyzing trace with hash 258640893, now seen corresponding path program 1 times [2024-11-08 16:27:23,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:23,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210395550] [2024-11-08 16:27:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:23,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:23,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:23,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210395550] [2024-11-08 16:27:23,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210395550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:27:23,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:27:23,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:27:23,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389048733] [2024-11-08 16:27:23,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:27:23,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:27:23,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:27:23,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:27:24,020 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 107 [2024-11-08 16:27:24,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 131 transitions, 685 flow. Second operand has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 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 16:27:24,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:24,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 107 [2024-11-08 16:27:24,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:26,755 INFO L124 PetriNetUnfolderBase]: 14195/22584 cut-off events. [2024-11-08 16:27:26,755 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2024-11-08 16:27:26,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41415 conditions, 22584 events. 14195/22584 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 173888 event pairs, 10160 based on Foata normal form. 0/15674 useless extension candidates. Maximal degree in co-relation 24715. Up to 18200 conditions per place. [2024-11-08 16:27:27,088 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 61 selfloop transitions, 9 changer transitions 0/126 dead transitions. [2024-11-08 16:27:27,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 126 transitions, 815 flow [2024-11-08 16:27:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:27:27,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:27:27,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 287 transitions. [2024-11-08 16:27:27,091 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5364485981308411 [2024-11-08 16:27:27,091 INFO L175 Difference]: Start difference. First operand has 127 places, 131 transitions, 685 flow. Second operand 5 states and 287 transitions. [2024-11-08 16:27:27,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 126 transitions, 815 flow [2024-11-08 16:27:27,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 126 transitions, 634 flow, removed 33 selfloop flow, removed 14 redundant places. [2024-11-08 16:27:27,096 INFO L231 Difference]: Finished difference. Result has 112 places, 126 transitions, 512 flow [2024-11-08 16:27:27,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=112, PETRI_TRANSITIONS=126} [2024-11-08 16:27:27,098 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 14 predicate places. [2024-11-08 16:27:27,098 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 126 transitions, 512 flow [2024-11-08 16:27:27,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 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 16:27:27,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:27,098 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:27,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 16:27:27,099 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:27:27,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:27,099 INFO L85 PathProgramCache]: Analyzing trace with hash 258640894, now seen corresponding path program 1 times [2024-11-08 16:27:27,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:27,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897030967] [2024-11-08 16:27:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:27,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:27,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897030967] [2024-11-08 16:27:27,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897030967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:27,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236725145] [2024-11-08 16:27:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:27,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:27,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:27,353 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:27,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 16:27:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:27,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 16:27:27,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:27,460 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 16:27:27,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:27:27,525 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 16:27:27,540 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 16:27:27,540 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 16:27:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:27,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:27:27,692 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 16:27:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:27,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236725145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:27:27,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:27:27,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-11-08 16:27:27,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770635088] [2024-11-08 16:27:27,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:27:27,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 16:27:27,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:27,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 16:27:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-08 16:27:28,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 107 [2024-11-08 16:27:28,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 126 transitions, 512 flow. Second operand has 11 states, 11 states have (on average 52.36363636363637) internal successors, (576), 11 states have internal predecessors, (576), 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 16:27:28,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:28,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 107 [2024-11-08 16:27:28,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:30,335 INFO L124 PetriNetUnfolderBase]: 9990/16427 cut-off events. [2024-11-08 16:27:30,335 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-11-08 16:27:30,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29333 conditions, 16427 events. 9990/16427 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 124733 event pairs, 6760 based on Foata normal form. 0/11219 useless extension candidates. Maximal degree in co-relation 7352. Up to 12465 conditions per place. [2024-11-08 16:27:30,402 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 53 selfloop transitions, 19 changer transitions 0/127 dead transitions. [2024-11-08 16:27:30,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 127 transitions, 658 flow [2024-11-08 16:27:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:27:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 16:27:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 454 transitions. [2024-11-08 16:27:30,404 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.530373831775701 [2024-11-08 16:27:30,404 INFO L175 Difference]: Start difference. First operand has 112 places, 126 transitions, 512 flow. Second operand 8 states and 454 transitions. [2024-11-08 16:27:30,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 127 transitions, 658 flow [2024-11-08 16:27:30,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 127 transitions, 645 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:27:30,408 INFO L231 Difference]: Finished difference. Result has 114 places, 124 transitions, 533 flow [2024-11-08 16:27:30,408 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=533, PETRI_PLACES=114, PETRI_TRANSITIONS=124} [2024-11-08 16:27:30,409 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 16 predicate places. [2024-11-08 16:27:30,409 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 124 transitions, 533 flow [2024-11-08 16:27:30,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 52.36363636363637) internal successors, (576), 11 states have internal predecessors, (576), 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 16:27:30,409 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:30,410 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:30,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 16:27:30,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 16:27:30,610 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:27:30,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:30,611 INFO L85 PathProgramCache]: Analyzing trace with hash 990982559, now seen corresponding path program 1 times [2024-11-08 16:27:30,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:30,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765824713] [2024-11-08 16:27:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:30,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:30,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:30,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765824713] [2024-11-08 16:27:30,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765824713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:30,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967384777] [2024-11-08 16:27:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:30,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:30,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:30,939 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:30,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 16:27:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:31,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 16:27:31,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:31,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:27:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:31,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967384777] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:27:31,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:27:31,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-08 16:27:31,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378939191] [2024-11-08 16:27:31,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:27:31,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 16:27:31,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:31,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 16:27:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:27:31,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 107 [2024-11-08 16:27:31,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 124 transitions, 533 flow. Second operand has 12 states, 12 states have (on average 45.083333333333336) internal successors, (541), 12 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 16:27:31,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:31,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 107 [2024-11-08 16:27:31,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:33,456 INFO L124 PetriNetUnfolderBase]: 9566/15487 cut-off events. [2024-11-08 16:27:33,456 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-11-08 16:27:33,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28223 conditions, 15487 events. 9566/15487 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 111832 event pairs, 5316 based on Foata normal form. 0/10599 useless extension candidates. Maximal degree in co-relation 10259. Up to 7836 conditions per place. [2024-11-08 16:27:33,544 INFO L140 encePairwiseOnDemand]: 90/107 looper letters, 140 selfloop transitions, 40 changer transitions 0/200 dead transitions. [2024-11-08 16:27:33,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 200 transitions, 1055 flow [2024-11-08 16:27:33,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:27:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 16:27:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 577 transitions. [2024-11-08 16:27:33,546 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5392523364485982 [2024-11-08 16:27:33,547 INFO L175 Difference]: Start difference. First operand has 114 places, 124 transitions, 533 flow. Second operand 10 states and 577 transitions. [2024-11-08 16:27:33,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 200 transitions, 1055 flow [2024-11-08 16:27:33,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 200 transitions, 1028 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 16:27:33,551 INFO L231 Difference]: Finished difference. Result has 121 places, 127 transitions, 630 flow [2024-11-08 16:27:33,552 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=630, PETRI_PLACES=121, PETRI_TRANSITIONS=127} [2024-11-08 16:27:33,553 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 23 predicate places. [2024-11-08 16:27:33,553 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 127 transitions, 630 flow [2024-11-08 16:27:33,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 45.083333333333336) internal successors, (541), 12 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 16:27:33,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:33,553 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:33,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 16:27:33,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 16:27:33,754 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:27:33,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash 360787511, now seen corresponding path program 1 times [2024-11-08 16:27:33,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:33,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753653826] [2024-11-08 16:27:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:33,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:33,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:33,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753653826] [2024-11-08 16:27:33,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753653826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:33,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637872738] [2024-11-08 16:27:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:33,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:33,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:33,967 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:33,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 16:27:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:34,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 16:27:34,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:34,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:27:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:34,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637872738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:27:34,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:27:34,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-08 16:27:34,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578091955] [2024-11-08 16:27:34,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:27:34,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 16:27:34,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:34,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 16:27:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:27:34,502 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 107 [2024-11-08 16:27:34,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 127 transitions, 630 flow. Second operand has 12 states, 12 states have (on average 45.333333333333336) internal successors, (544), 12 states have internal predecessors, (544), 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 16:27:34,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:34,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 107 [2024-11-08 16:27:34,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:36,266 INFO L124 PetriNetUnfolderBase]: 8024/11951 cut-off events. [2024-11-08 16:27:36,266 INFO L125 PetriNetUnfolderBase]: For 2389/2389 co-relation queries the response was YES. [2024-11-08 16:27:36,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24120 conditions, 11951 events. 8024/11951 cut-off events. For 2389/2389 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 75234 event pairs, 4952 based on Foata normal form. 0/8479 useless extension candidates. Maximal degree in co-relation 10334. Up to 8292 conditions per place. [2024-11-08 16:27:36,352 INFO L140 encePairwiseOnDemand]: 90/107 looper letters, 127 selfloop transitions, 40 changer transitions 0/188 dead transitions. [2024-11-08 16:27:36,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 188 transitions, 1109 flow [2024-11-08 16:27:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:27:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 16:27:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 564 transitions. [2024-11-08 16:27:36,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5271028037383177 [2024-11-08 16:27:36,356 INFO L175 Difference]: Start difference. First operand has 121 places, 127 transitions, 630 flow. Second operand 10 states and 564 transitions. [2024-11-08 16:27:36,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 188 transitions, 1109 flow [2024-11-08 16:27:36,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 188 transitions, 1064 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 16:27:36,369 INFO L231 Difference]: Finished difference. Result has 128 places, 130 transitions, 709 flow [2024-11-08 16:27:36,370 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=709, PETRI_PLACES=128, PETRI_TRANSITIONS=130} [2024-11-08 16:27:36,370 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 30 predicate places. [2024-11-08 16:27:36,371 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 130 transitions, 709 flow [2024-11-08 16:27:36,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 45.333333333333336) internal successors, (544), 12 states have internal predecessors, (544), 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 16:27:36,372 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:36,372 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:36,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 16:27:36,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 16:27:36,576 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:27:36,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:36,577 INFO L85 PathProgramCache]: Analyzing trace with hash -945589683, now seen corresponding path program 1 times [2024-11-08 16:27:36,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:36,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962483702] [2024-11-08 16:27:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:36,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:36,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:36,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962483702] [2024-11-08 16:27:36,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962483702] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:36,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429601843] [2024-11-08 16:27:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:36,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:36,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:36,812 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:36,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 16:27:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:36,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 16:27:36,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:37,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:27:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:27:37,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429601843] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:27:37,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:27:37,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-08 16:27:37,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622919258] [2024-11-08 16:27:37,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:27:37,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 16:27:37,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:37,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 16:27:37,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:27:37,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 107 [2024-11-08 16:27:37,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 130 transitions, 709 flow. Second operand has 12 states, 12 states have (on average 45.5) internal successors, (546), 12 states have internal predecessors, (546), 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 16:27:37,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:37,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 107 [2024-11-08 16:27:37,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:38,869 INFO L124 PetriNetUnfolderBase]: 7316/10871 cut-off events. [2024-11-08 16:27:38,869 INFO L125 PetriNetUnfolderBase]: For 3447/3447 co-relation queries the response was YES. [2024-11-08 16:27:38,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22992 conditions, 10871 events. 7316/10871 cut-off events. For 3447/3447 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 69792 event pairs, 4004 based on Foata normal form. 0/7735 useless extension candidates. Maximal degree in co-relation 10500. Up to 7148 conditions per place. [2024-11-08 16:27:38,923 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 121 selfloop transitions, 38 changer transitions 0/181 dead transitions. [2024-11-08 16:27:38,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 181 transitions, 1165 flow [2024-11-08 16:27:38,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:27:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 16:27:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 556 transitions. [2024-11-08 16:27:38,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5196261682242991 [2024-11-08 16:27:38,926 INFO L175 Difference]: Start difference. First operand has 128 places, 130 transitions, 709 flow. Second operand 10 states and 556 transitions. [2024-11-08 16:27:38,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 181 transitions, 1165 flow [2024-11-08 16:27:38,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 181 transitions, 1120 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 16:27:38,936 INFO L231 Difference]: Finished difference. Result has 135 places, 132 transitions, 779 flow [2024-11-08 16:27:38,936 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=779, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2024-11-08 16:27:38,937 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 37 predicate places. [2024-11-08 16:27:38,937 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 779 flow [2024-11-08 16:27:38,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 45.5) internal successors, (546), 12 states have internal predecessors, (546), 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 16:27:38,938 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:38,938 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:38,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 16:27:39,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 16:27:39,142 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:27:39,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:39,142 INFO L85 PathProgramCache]: Analyzing trace with hash -46798555, now seen corresponding path program 2 times [2024-11-08 16:27:39,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:39,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111362931] [2024-11-08 16:27:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:39,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 16:27:39,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:39,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111362931] [2024-11-08 16:27:39,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111362931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:39,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468800783] [2024-11-08 16:27:39,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:27:39,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:39,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:39,928 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:39,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 16:27:40,050 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 16:27:40,050 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:27:40,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-08 16:27:40,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:40,066 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 16:27:40,078 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 16:27:40,364 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-08 16:27:40,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-08 16:27:40,390 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-08 16:27:40,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-08 16:27:40,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:27:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:27:40,639 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-08 16:27:40,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 34 [2024-11-08 16:27:40,667 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-08 16:27:40,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-08 16:27:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:27:41,469 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:27:41,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468800783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:27:41,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:27:41,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 15 [2024-11-08 16:27:41,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394645021] [2024-11-08 16:27:41,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:27:41,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 16:27:41,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:41,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 16:27:41,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-08 16:27:42,301 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 107 [2024-11-08 16:27:42,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 132 transitions, 779 flow. Second operand has 8 states, 8 states have (on average 42.375) internal successors, (339), 8 states have internal predecessors, (339), 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 16:27:42,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:42,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 107 [2024-11-08 16:27:42,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:45,875 INFO L124 PetriNetUnfolderBase]: 14374/22749 cut-off events. [2024-11-08 16:27:45,876 INFO L125 PetriNetUnfolderBase]: For 5447/5447 co-relation queries the response was YES. [2024-11-08 16:27:45,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48787 conditions, 22749 events. 14374/22749 cut-off events. For 5447/5447 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 175048 event pairs, 3080 based on Foata normal form. 0/16465 useless extension candidates. Maximal degree in co-relation 24351. Up to 11773 conditions per place. [2024-11-08 16:27:46,050 INFO L140 encePairwiseOnDemand]: 97/107 looper letters, 115 selfloop transitions, 19 changer transitions 0/186 dead transitions. [2024-11-08 16:27:46,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 186 transitions, 1193 flow [2024-11-08 16:27:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:27:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 16:27:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 426 transitions. [2024-11-08 16:27:46,052 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4976635514018692 [2024-11-08 16:27:46,053 INFO L175 Difference]: Start difference. First operand has 135 places, 132 transitions, 779 flow. Second operand 8 states and 426 transitions. [2024-11-08 16:27:46,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 186 transitions, 1193 flow [2024-11-08 16:27:46,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 186 transitions, 1148 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 16:27:46,119 INFO L231 Difference]: Finished difference. Result has 139 places, 136 transitions, 806 flow [2024-11-08 16:27:46,119 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=806, PETRI_PLACES=139, PETRI_TRANSITIONS=136} [2024-11-08 16:27:46,120 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 41 predicate places. [2024-11-08 16:27:46,120 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 136 transitions, 806 flow [2024-11-08 16:27:46,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 42.375) internal successors, (339), 8 states have internal predecessors, (339), 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 16:27:46,121 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:46,121 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:46,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 16:27:46,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 16:27:46,325 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:27:46,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash -514450367, now seen corresponding path program 1 times [2024-11-08 16:27:46,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:46,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275715912] [2024-11-08 16:27:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:46,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 16:27:47,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:47,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275715912] [2024-11-08 16:27:47,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275715912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:47,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926860704] [2024-11-08 16:27:47,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:47,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:47,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:47,019 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:47,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 16:27:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:47,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 16:27:47,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:47,178 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 16:27:47,359 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 16:27:47,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-08 16:27:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:27:47,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:27:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 16:27:47,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926860704] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:47,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:27:47,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2024-11-08 16:27:47,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998302744] [2024-11-08 16:27:47,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:27:47,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 16:27:47,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:47,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 16:27:47,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-08 16:27:48,342 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 107 [2024-11-08 16:27:48,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 136 transitions, 806 flow. Second operand has 8 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 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 16:27:48,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:48,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 107 [2024-11-08 16:27:48,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:51,441 INFO L124 PetriNetUnfolderBase]: 15025/23907 cut-off events. [2024-11-08 16:27:51,441 INFO L125 PetriNetUnfolderBase]: For 13982/16898 co-relation queries the response was YES. [2024-11-08 16:27:51,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55436 conditions, 23907 events. 15025/23907 cut-off events. For 13982/16898 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 184483 event pairs, 5886 based on Foata normal form. 4/17698 useless extension candidates. Maximal degree in co-relation 27806. Up to 10670 conditions per place. [2024-11-08 16:27:51,684 INFO L140 encePairwiseOnDemand]: 95/107 looper letters, 110 selfloop transitions, 20 changer transitions 0/189 dead transitions. [2024-11-08 16:27:51,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 189 transitions, 1256 flow [2024-11-08 16:27:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:27:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 16:27:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 541 transitions. [2024-11-08 16:27:51,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6320093457943925 [2024-11-08 16:27:51,686 INFO L175 Difference]: Start difference. First operand has 139 places, 136 transitions, 806 flow. Second operand 8 states and 541 transitions. [2024-11-08 16:27:51,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 189 transitions, 1256 flow [2024-11-08 16:27:51,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 189 transitions, 1235 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-08 16:27:51,765 INFO L231 Difference]: Finished difference. Result has 144 places, 140 transitions, 870 flow [2024-11-08 16:27:51,766 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=870, PETRI_PLACES=144, PETRI_TRANSITIONS=140} [2024-11-08 16:27:51,766 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 46 predicate places. [2024-11-08 16:27:51,767 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 140 transitions, 870 flow [2024-11-08 16:27:51,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 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 16:27:51,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:27:51,768 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:27:51,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 16:27:51,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 16:27:51,969 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:27:51,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:27:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash -514450371, now seen corresponding path program 2 times [2024-11-08 16:27:51,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:27:51,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795617401] [2024-11-08 16:27:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:27:51,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:27:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:27:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 16:27:53,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:27:53,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795617401] [2024-11-08 16:27:53,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795617401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:27:53,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823438034] [2024-11-08 16:27:53,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:27:53,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:27:53,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:27:53,204 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:27:53,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 16:27:53,327 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 16:27:53,327 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:27:53,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 16:27:53,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:27:53,345 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 16:27:53,355 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 16:27:53,544 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-08 16:27:53,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-08 16:27:53,564 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 16:27:53,564 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 16:27:53,817 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-08 16:27:53,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 34 [2024-11-08 16:27:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:27:54,722 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:27:54,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823438034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:27:54,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:27:54,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2024-11-08 16:27:54,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895983661] [2024-11-08 16:27:54,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:27:54,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 16:27:54,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:27:54,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 16:27:54,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2024-11-08 16:27:55,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 107 [2024-11-08 16:27:55,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 140 transitions, 870 flow. Second operand has 8 states, 8 states have (on average 48.625) internal successors, (389), 8 states have internal predecessors, (389), 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 16:27:55,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:27:55,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 107 [2024-11-08 16:27:55,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:27:59,976 INFO L124 PetriNetUnfolderBase]: 22591/33190 cut-off events. [2024-11-08 16:27:59,976 INFO L125 PetriNetUnfolderBase]: For 28711/32563 co-relation queries the response was YES. [2024-11-08 16:28:00,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86382 conditions, 33190 events. 22591/33190 cut-off events. For 28711/32563 co-relation queries the response was YES. Maximal size of possible extension queue 1244. Compared 233371 event pairs, 9986 based on Foata normal form. 12/27195 useless extension candidates. Maximal degree in co-relation 42696. Up to 18988 conditions per place. [2024-11-08 16:28:00,522 INFO L140 encePairwiseOnDemand]: 97/107 looper letters, 117 selfloop transitions, 24 changer transitions 0/196 dead transitions. [2024-11-08 16:28:00,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 196 transitions, 1357 flow [2024-11-08 16:28:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:28:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 16:28:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 515 transitions. [2024-11-08 16:28:00,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5347871235721703 [2024-11-08 16:28:00,524 INFO L175 Difference]: Start difference. First operand has 144 places, 140 transitions, 870 flow. Second operand 9 states and 515 transitions. [2024-11-08 16:28:00,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 196 transitions, 1357 flow [2024-11-08 16:28:00,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 196 transitions, 1339 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 16:28:00,630 INFO L231 Difference]: Finished difference. Result has 150 places, 143 transitions, 935 flow [2024-11-08 16:28:00,631 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=935, PETRI_PLACES=150, PETRI_TRANSITIONS=143} [2024-11-08 16:28:00,631 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 52 predicate places. [2024-11-08 16:28:00,631 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 143 transitions, 935 flow [2024-11-08 16:28:00,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 48.625) internal successors, (389), 8 states have internal predecessors, (389), 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 16:28:00,632 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:28:00,632 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:00,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 16:28:00,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 16:28:00,836 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:28:00,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:00,836 INFO L85 PathProgramCache]: Analyzing trace with hash -514450369, now seen corresponding path program 1 times [2024-11-08 16:28:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:00,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389948342] [2024-11-08 16:28:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:00,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 16:28:01,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:01,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389948342] [2024-11-08 16:28:01,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389948342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:28:01,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268906987] [2024-11-08 16:28:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:01,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:01,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:28:01,339 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:28:01,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 16:28:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:01,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 16:28:01,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:28:01,482 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 16:28:01,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:28:01,596 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 16:28:01,607 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 16:28:01,607 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 16:28:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 16:28:01,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:28:01,978 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 33 treesize of output 29 [2024-11-08 16:28:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 16:28:02,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268906987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:28:02,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:28:02,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2024-11-08 16:28:02,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363398106] [2024-11-08 16:28:02,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:28:02,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 16:28:02,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:02,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 16:28:02,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-08 16:28:04,857 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 107 [2024-11-08 16:28:04,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 143 transitions, 935 flow. Second operand has 23 states, 23 states have (on average 41.69565217391305) internal successors, (959), 23 states have internal predecessors, (959), 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 16:28:04,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:28:04,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 107 [2024-11-08 16:28:04,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:28:09,942 INFO L124 PetriNetUnfolderBase]: 21427/30750 cut-off events. [2024-11-08 16:28:09,942 INFO L125 PetriNetUnfolderBase]: For 44347/48095 co-relation queries the response was YES. [2024-11-08 16:28:10,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86468 conditions, 30750 events. 21427/30750 cut-off events. For 44347/48095 co-relation queries the response was YES. Maximal size of possible extension queue 1264. Compared 204420 event pairs, 6648 based on Foata normal form. 4/25997 useless extension candidates. Maximal degree in co-relation 43070. Up to 13702 conditions per place. [2024-11-08 16:28:10,227 INFO L140 encePairwiseOnDemand]: 92/107 looper letters, 159 selfloop transitions, 35 changer transitions 0/219 dead transitions. [2024-11-08 16:28:10,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 219 transitions, 1579 flow [2024-11-08 16:28:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 16:28:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-08 16:28:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 760 transitions. [2024-11-08 16:28:10,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4439252336448598 [2024-11-08 16:28:10,230 INFO L175 Difference]: Start difference. First operand has 150 places, 143 transitions, 935 flow. Second operand 16 states and 760 transitions. [2024-11-08 16:28:10,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 219 transitions, 1579 flow [2024-11-08 16:28:10,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 219 transitions, 1539 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-08 16:28:10,340 INFO L231 Difference]: Finished difference. Result has 161 places, 144 transitions, 991 flow [2024-11-08 16:28:10,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=991, PETRI_PLACES=161, PETRI_TRANSITIONS=144} [2024-11-08 16:28:10,341 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 63 predicate places. [2024-11-08 16:28:10,342 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 144 transitions, 991 flow [2024-11-08 16:28:10,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 41.69565217391305) internal successors, (959), 23 states have internal predecessors, (959), 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 16:28:10,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:28:10,343 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:10,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-08 16:28:10,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e1112f-54c8-46be-bc26-28af6ba6bfc8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:10,547 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 16:28:10,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash -514450368, now seen corresponding path program 1 times [2024-11-08 16:28:10,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:10,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473995224] [2024-11-08 16:28:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:10,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 16:28:10,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:10,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473995224] [2024-11-08 16:28:10,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473995224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:28:10,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:28:10,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:28:10,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646236849] [2024-11-08 16:28:10,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:28:10,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:28:10,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:28:10,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:28:10,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2024-11-08 16:28:10,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 144 transitions, 991 flow. Second operand has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 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 16:28:10,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:28:10,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2024-11-08 16:28:10,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand