./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-sum.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_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/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_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/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_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/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 c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:02:59,751 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:02:59,848 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:02:59,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:02:59,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:02:59,890 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:02:59,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:02:59,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:02:59,892 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:02:59,893 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:02:59,894 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:02:59,894 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:02:59,895 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:02:59,897 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:02:59,898 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:02:59,898 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:02:59,901 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:02:59,901 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:02:59,902 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:02:59,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:02:59,903 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:02:59,904 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:02:59,905 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:02:59,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:02:59,905 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:02:59,906 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:02:59,906 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:02:59,906 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:02:59,907 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:02:59,907 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:02:59,909 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:02:59,909 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:02:59,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:02:59,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:02:59,910 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:02:59,910 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:02:59,910 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:02:59,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:02:59,911 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:02:59,911 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:02:59,911 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:02:59,912 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:02:59,912 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_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e [2024-11-08 18:03:00,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:03:00,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:03:00,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:03:00,236 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:03:00,236 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:03:00,238 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c Unable to find full path for "g++" [2024-11-08 18:03:02,259 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:03:02,457 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:03:02,458 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2024-11-08 18:03:02,465 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/data/6f7723892/fdfeb7febd184829842c0cdde4f41fd5/FLAG90f81bf0b [2024-11-08 18:03:02,479 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/data/6f7723892/fdfeb7febd184829842c0cdde4f41fd5 [2024-11-08 18:03:02,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:03:02,483 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:03:02,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:03:02,484 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:03:02,490 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:03:02,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,496 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba0a8d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02, skipping insertion in model container [2024-11-08 18:03:02,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,521 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:03:02,754 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 18:03:02,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:03:02,766 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:03:02,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:03:02,824 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:03:02,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02 WrapperNode [2024-11-08 18:03:02,824 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:03:02,825 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:03:02,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:03:02,826 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:03:02,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,842 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,867 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 137 [2024-11-08 18:03:02,868 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:03:02,868 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:03:02,869 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:03:02,869 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:03:02,881 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,888 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,905 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 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 18:03:02,905 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,906 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,915 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,919 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,921 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,923 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,926 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:03:02,927 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:03:02,927 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:03:02,927 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:03:02,928 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (1/1) ... [2024-11-08 18:03:02,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:03:02,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:03:02,961 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:03:02,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:03:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:03:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 18:03:02,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 18:03:02,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 18:03:02,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 18:03:02,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 18:03:02,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 18:03:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:03:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:03:02,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:03:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:03:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 18:03:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 18:03:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 18:03:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:03:02,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:03:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:03:02,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:03:03,000 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 18:03:03,134 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:03:03,137 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:03:03,625 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:03:03,625 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:03:03,941 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:03:03,942 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 18:03:03,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:03:03 BoogieIcfgContainer [2024-11-08 18:03:03,942 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:03:03,945 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:03:03,945 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:03:03,948 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:03:03,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:03:02" (1/3) ... [2024-11-08 18:03:03,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d1fac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:03:03, skipping insertion in model container [2024-11-08 18:03:03,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:03:02" (2/3) ... [2024-11-08 18:03:03,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d1fac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:03:03, skipping insertion in model container [2024-11-08 18:03:03,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:03:03" (3/3) ... [2024-11-08 18:03:03,952 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2024-11-08 18:03:03,970 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:03:03,970 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-08 18:03:03,970 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:03:04,050 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 18:03:04,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 82 transitions, 185 flow [2024-11-08 18:03:04,140 INFO L124 PetriNetUnfolderBase]: 13/79 cut-off events. [2024-11-08 18:03:04,141 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 18:03:04,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 79 events. 13/79 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 178 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2024-11-08 18:03:04,148 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 82 transitions, 185 flow [2024-11-08 18:03:04,153 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 78 transitions, 174 flow [2024-11-08 18:03:04,166 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:03:04,173 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;@97619e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:03:04,173 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-08 18:03:04,177 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:03:04,178 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 18:03:04,178 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:03:04,178 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:04,181 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:03:04,181 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:04,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:04,188 INFO L85 PathProgramCache]: Analyzing trace with hash 18639710, now seen corresponding path program 1 times [2024-11-08 18:03:04,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:04,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355618959] [2024-11-08 18:03:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:04,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:04,546 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 18:03:04,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:04,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355618959] [2024-11-08 18:03:04,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355618959] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:03:04,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:03:04,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 18:03:04,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126535049] [2024-11-08 18:03:04,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:03:04,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:03:04,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:04,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:03:04,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:03:04,619 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 82 [2024-11-08 18:03:04,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 18:03:04,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:04,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 82 [2024-11-08 18:03:04,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:05,193 INFO L124 PetriNetUnfolderBase]: 1686/2649 cut-off events. [2024-11-08 18:03:05,193 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2024-11-08 18:03:05,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5064 conditions, 2649 events. 1686/2649 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 16512 event pairs, 1286 based on Foata normal form. 1/1825 useless extension candidates. Maximal degree in co-relation 4504. Up to 2234 conditions per place. [2024-11-08 18:03:05,228 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 38 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-11-08 18:03:05,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 244 flow [2024-11-08 18:03:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:03:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:03:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2024-11-08 18:03:05,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-11-08 18:03:05,246 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 174 flow. Second operand 3 states and 155 transitions. [2024-11-08 18:03:05,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 244 flow [2024-11-08 18:03:05,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 232 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 18:03:05,261 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 156 flow [2024-11-08 18:03:05,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2024-11-08 18:03:05,270 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -9 predicate places. [2024-11-08 18:03:05,270 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 156 flow [2024-11-08 18:03:05,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 18:03:05,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:05,271 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:03:05,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:03:05,271 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:05,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:05,273 INFO L85 PathProgramCache]: Analyzing trace with hash 18639711, now seen corresponding path program 1 times [2024-11-08 18:03:05,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:05,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090440555] [2024-11-08 18:03:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:05,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:05,676 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 18:03:05,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:05,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090440555] [2024-11-08 18:03:05,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090440555] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:03:05,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:03:05,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:03:05,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901785987] [2024-11-08 18:03:05,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:03:05,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:03:05,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:03:05,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:03:05,794 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-08 18:03:05,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 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 18:03:05,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:05,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-08 18:03:05,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:06,340 INFO L124 PetriNetUnfolderBase]: 1686/2649 cut-off events. [2024-11-08 18:03:06,341 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-08 18:03:06,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 2649 events. 1686/2649 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 16497 event pairs, 1286 based on Foata normal form. 0/1819 useless extension candidates. Maximal degree in co-relation 4904. Up to 2249 conditions per place. [2024-11-08 18:03:06,365 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 47 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-11-08 18:03:06,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 73 transitions, 260 flow [2024-11-08 18:03:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:03:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:03:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 165 transitions. [2024-11-08 18:03:06,368 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2024-11-08 18:03:06,368 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 156 flow. Second operand 4 states and 165 transitions. [2024-11-08 18:03:06,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 73 transitions, 260 flow [2024-11-08 18:03:06,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:03:06,373 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 162 flow [2024-11-08 18:03:06,373 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2024-11-08 18:03:06,374 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -9 predicate places. [2024-11-08 18:03:06,375 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 162 flow [2024-11-08 18:03:06,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 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 18:03:06,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:06,376 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:03:06,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:03:06,376 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:06,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:06,378 INFO L85 PathProgramCache]: Analyzing trace with hash 732030941, now seen corresponding path program 1 times [2024-11-08 18:03:06,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:06,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679337969] [2024-11-08 18:03:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:06,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:06,544 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 18:03:06,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:06,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679337969] [2024-11-08 18:03:06,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679337969] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:03:06,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:03:06,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:03:06,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924656361] [2024-11-08 18:03:06,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:03:06,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:03:06,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:06,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:03:06,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:03:06,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 82 [2024-11-08 18:03:06,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:03:06,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:06,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 82 [2024-11-08 18:03:06,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:07,413 INFO L124 PetriNetUnfolderBase]: 3371/5301 cut-off events. [2024-11-08 18:03:07,413 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-08 18:03:07,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9910 conditions, 5301 events. 3371/5301 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 34627 event pairs, 2572 based on Foata normal form. 0/3697 useless extension candidates. Maximal degree in co-relation 4956. Up to 2252 conditions per place. [2024-11-08 18:03:07,454 INFO L140 encePairwiseOnDemand]: 67/82 looper letters, 85 selfloop transitions, 18 changer transitions 0/126 dead transitions. [2024-11-08 18:03:07,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 126 transitions, 488 flow [2024-11-08 18:03:07,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:03:07,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:03:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 289 transitions. [2024-11-08 18:03:07,459 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5873983739837398 [2024-11-08 18:03:07,460 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 162 flow. Second operand 6 states and 289 transitions. [2024-11-08 18:03:07,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 126 transitions, 488 flow [2024-11-08 18:03:07,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 126 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:03:07,467 INFO L231 Difference]: Finished difference. Result has 72 places, 88 transitions, 272 flow [2024-11-08 18:03:07,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=72, PETRI_TRANSITIONS=88} [2024-11-08 18:03:07,468 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -3 predicate places. [2024-11-08 18:03:07,468 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 88 transitions, 272 flow [2024-11-08 18:03:07,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:03:07,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:07,469 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:03:07,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 18:03:07,469 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:07,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:07,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1404514277, now seen corresponding path program 1 times [2024-11-08 18:03:07,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:07,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734891641] [2024-11-08 18:03:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:07,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:07,787 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 18:03:07,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:07,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734891641] [2024-11-08 18:03:07,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734891641] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:03:07,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065724802] [2024-11-08 18:03:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:07,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:03:07,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:03:07,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:03:07,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:03:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:07,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 18:03:07,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:03:07,988 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 18:03:08,204 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:03:08,204 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 18:03:08,259 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 18:03:08,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:03:08,417 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 18:03:08,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065724802] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:03:08,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:03:08,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 11 [2024-11-08 18:03:08,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653941968] [2024-11-08 18:03:08,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:03:08,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:03:08,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:08,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:03:08,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-08 18:03:08,558 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 82 [2024-11-08 18:03:08,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 88 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 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 18:03:08,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:08,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 82 [2024-11-08 18:03:08,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:09,890 INFO L124 PetriNetUnfolderBase]: 5050/7928 cut-off events. [2024-11-08 18:03:09,891 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-08 18:03:09,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14843 conditions, 7928 events. 5050/7928 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 55335 event pairs, 3858 based on Foata normal form. 2/5564 useless extension candidates. Maximal degree in co-relation 4918. Up to 4478 conditions per place. [2024-11-08 18:03:09,972 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 76 selfloop transitions, 10 changer transitions 0/122 dead transitions. [2024-11-08 18:03:09,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 122 transitions, 521 flow [2024-11-08 18:03:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:03:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:03:09,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 270 transitions. [2024-11-08 18:03:09,975 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-11-08 18:03:09,975 INFO L175 Difference]: Start difference. First operand has 72 places, 88 transitions, 272 flow. Second operand 5 states and 270 transitions. [2024-11-08 18:03:09,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 122 transitions, 521 flow [2024-11-08 18:03:09,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 122 transitions, 521 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 18:03:09,982 INFO L231 Difference]: Finished difference. Result has 77 places, 89 transitions, 308 flow [2024-11-08 18:03:09,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=77, PETRI_TRANSITIONS=89} [2024-11-08 18:03:09,985 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2024-11-08 18:03:09,986 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 89 transitions, 308 flow [2024-11-08 18:03:09,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 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 18:03:09,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:09,987 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:03:10,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 18:03:10,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:03:10,192 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:10,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:10,193 INFO L85 PathProgramCache]: Analyzing trace with hash 313214670, now seen corresponding path program 1 times [2024-11-08 18:03:10,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:10,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561842028] [2024-11-08 18:03:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:10,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:10,305 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 18:03:10,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:10,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561842028] [2024-11-08 18:03:10,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561842028] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:03:10,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:03:10,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:03:10,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853019254] [2024-11-08 18:03:10,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:03:10,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:03:10,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:10,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:03:10,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:03:10,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 82 [2024-11-08 18:03:10,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 89 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:03:10,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:10,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 82 [2024-11-08 18:03:10,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:11,593 INFO L124 PetriNetUnfolderBase]: 4912/7740 cut-off events. [2024-11-08 18:03:11,593 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-11-08 18:03:11,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14599 conditions, 7740 events. 4912/7740 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 53195 event pairs, 2744 based on Foata normal form. 324/5741 useless extension candidates. Maximal degree in co-relation 7492. Up to 3411 conditions per place. [2024-11-08 18:03:11,649 INFO L140 encePairwiseOnDemand]: 66/82 looper letters, 107 selfloop transitions, 18 changer transitions 0/146 dead transitions. [2024-11-08 18:03:11,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 146 transitions, 690 flow [2024-11-08 18:03:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:03:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:03:11,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 295 transitions. [2024-11-08 18:03:11,651 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5995934959349594 [2024-11-08 18:03:11,652 INFO L175 Difference]: Start difference. First operand has 77 places, 89 transitions, 308 flow. Second operand 6 states and 295 transitions. [2024-11-08 18:03:11,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 146 transitions, 690 flow [2024-11-08 18:03:11,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 146 transitions, 688 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:03:11,663 INFO L231 Difference]: Finished difference. Result has 83 places, 91 transitions, 359 flow [2024-11-08 18:03:11,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=83, PETRI_TRANSITIONS=91} [2024-11-08 18:03:11,666 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 8 predicate places. [2024-11-08 18:03:11,667 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 91 transitions, 359 flow [2024-11-08 18:03:11,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:03:11,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:11,668 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:03:11,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 18:03:11,668 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:11,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:11,669 INFO L85 PathProgramCache]: Analyzing trace with hash -312830862, now seen corresponding path program 1 times [2024-11-08 18:03:11,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:11,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767231250] [2024-11-08 18:03:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:11,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:11,892 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 18:03:11,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:11,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767231250] [2024-11-08 18:03:11,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767231250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:03:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312817521] [2024-11-08 18:03:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:11,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:03:11,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:03:11,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:03:11,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:03:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:11,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 18:03:11,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:03:12,102 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 18:03:12,103 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:03:12,198 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 18:03:12,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312817521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:03:12,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:03:12,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 18:03:12,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847839152] [2024-11-08 18:03:12,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:03:12,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:03:12,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:03:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:03:12,606 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 82 [2024-11-08 18:03:12,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 359 flow. Second operand has 14 states, 14 states have (on average 33.142857142857146) internal successors, (464), 14 states have internal predecessors, (464), 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 18:03:12,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:12,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 82 [2024-11-08 18:03:12,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:14,617 INFO L124 PetriNetUnfolderBase]: 5835/10078 cut-off events. [2024-11-08 18:03:14,618 INFO L125 PetriNetUnfolderBase]: For 2585/2736 co-relation queries the response was YES. [2024-11-08 18:03:14,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20158 conditions, 10078 events. 5835/10078 cut-off events. For 2585/2736 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 77352 event pairs, 4567 based on Foata normal form. 2/6902 useless extension candidates. Maximal degree in co-relation 6466. Up to 5481 conditions per place. [2024-11-08 18:03:14,754 INFO L140 encePairwiseOnDemand]: 66/82 looper letters, 87 selfloop transitions, 56 changer transitions 0/166 dead transitions. [2024-11-08 18:03:14,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 166 transitions, 944 flow [2024-11-08 18:03:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 18:03:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 18:03:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 541 transitions. [2024-11-08 18:03:14,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5075046904315197 [2024-11-08 18:03:14,757 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 359 flow. Second operand 13 states and 541 transitions. [2024-11-08 18:03:14,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 166 transitions, 944 flow [2024-11-08 18:03:14,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 166 transitions, 892 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:03:14,777 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 664 flow [2024-11-08 18:03:14,777 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=664, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2024-11-08 18:03:14,779 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 21 predicate places. [2024-11-08 18:03:14,780 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 664 flow [2024-11-08 18:03:14,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 33.142857142857146) internal successors, (464), 14 states have internal predecessors, (464), 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 18:03:14,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:14,781 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:03:14,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 18:03:14,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 18:03:14,985 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:14,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:14,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1728868925, now seen corresponding path program 1 times [2024-11-08 18:03:14,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:14,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907259269] [2024-11-08 18:03:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:14,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:15,103 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 18:03:15,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:15,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907259269] [2024-11-08 18:03:15,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907259269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:03:15,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:03:15,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:03:15,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797983172] [2024-11-08 18:03:15,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:03:15,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:03:15,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:15,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:03:15,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:03:15,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 82 [2024-11-08 18:03:15,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 664 flow. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 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 18:03:15,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:15,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 82 [2024-11-08 18:03:15,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:16,343 INFO L124 PetriNetUnfolderBase]: 4777/7280 cut-off events. [2024-11-08 18:03:16,343 INFO L125 PetriNetUnfolderBase]: For 1612/1986 co-relation queries the response was YES. [2024-11-08 18:03:16,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15359 conditions, 7280 events. 4777/7280 cut-off events. For 1612/1986 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 41929 event pairs, 3452 based on Foata normal form. 110/5670 useless extension candidates. Maximal degree in co-relation 12888. Up to 5632 conditions per place. [2024-11-08 18:03:16,395 INFO L140 encePairwiseOnDemand]: 66/82 looper letters, 108 selfloop transitions, 30 changer transitions 0/159 dead transitions. [2024-11-08 18:03:16,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 159 transitions, 1060 flow [2024-11-08 18:03:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:03:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:03:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 278 transitions. [2024-11-08 18:03:16,397 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5650406504065041 [2024-11-08 18:03:16,397 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 664 flow. Second operand 6 states and 278 transitions. [2024-11-08 18:03:16,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 159 transitions, 1060 flow [2024-11-08 18:03:16,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 159 transitions, 958 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-11-08 18:03:16,406 INFO L231 Difference]: Finished difference. Result has 100 places, 123 transitions, 640 flow [2024-11-08 18:03:16,406 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=640, PETRI_PLACES=100, PETRI_TRANSITIONS=123} [2024-11-08 18:03:16,409 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 25 predicate places. [2024-11-08 18:03:16,409 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 123 transitions, 640 flow [2024-11-08 18:03:16,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 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 18:03:16,410 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:16,410 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-08 18:03:16,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 18:03:16,411 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:16,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:16,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1324734000, now seen corresponding path program 2 times [2024-11-08 18:03:16,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:16,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183430362] [2024-11-08 18:03:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:16,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:16,804 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 18:03:16,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:16,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183430362] [2024-11-08 18:03:16,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183430362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:03:16,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301902849] [2024-11-08 18:03:16,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:03:16,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:03:16,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:03:16,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:03:16,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:03:16,891 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:03:16,892 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:03:16,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-08 18:03:16,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:03:16,921 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 18:03:17,138 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:03:17,139 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 18:03:17,263 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 18:03:17,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:03:17,638 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 18:03:17,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301902849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:03:17,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:03:17,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-08 18:03:17,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368671121] [2024-11-08 18:03:17,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:03:17,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 18:03:17,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:17,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 18:03:17,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-08 18:03:19,731 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-08 18:03:19,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 123 transitions, 640 flow. Second operand has 20 states, 20 states have (on average 30.25) internal successors, (605), 20 states have internal predecessors, (605), 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 18:03:19,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:19,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-08 18:03:19,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:23,407 INFO L124 PetriNetUnfolderBase]: 8774/14011 cut-off events. [2024-11-08 18:03:23,408 INFO L125 PetriNetUnfolderBase]: For 3138/4122 co-relation queries the response was YES. [2024-11-08 18:03:23,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29105 conditions, 14011 events. 8774/14011 cut-off events. For 3138/4122 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 100551 event pairs, 6792 based on Foata normal form. 35/10097 useless extension candidates. Maximal degree in co-relation 27655. Up to 4486 conditions per place. [2024-11-08 18:03:23,507 INFO L140 encePairwiseOnDemand]: 64/82 looper letters, 163 selfloop transitions, 37 changer transitions 12/233 dead transitions. [2024-11-08 18:03:23,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 233 transitions, 1452 flow [2024-11-08 18:03:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 18:03:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-08 18:03:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 607 transitions. [2024-11-08 18:03:23,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5287456445993032 [2024-11-08 18:03:23,510 INFO L175 Difference]: Start difference. First operand has 100 places, 123 transitions, 640 flow. Second operand 14 states and 607 transitions. [2024-11-08 18:03:23,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 233 transitions, 1452 flow [2024-11-08 18:03:23,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 233 transitions, 1387 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-08 18:03:23,533 INFO L231 Difference]: Finished difference. Result has 117 places, 125 transitions, 763 flow [2024-11-08 18:03:23,534 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=763, PETRI_PLACES=117, PETRI_TRANSITIONS=125} [2024-11-08 18:03:23,534 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 42 predicate places. [2024-11-08 18:03:23,534 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 125 transitions, 763 flow [2024-11-08 18:03:23,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.25) internal successors, (605), 20 states have internal predecessors, (605), 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 18:03:23,535 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:23,535 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 18:03:23,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 18:03:23,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-08 18:03:23,741 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:23,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1399497522, now seen corresponding path program 1 times [2024-11-08 18:03:23,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:23,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277606871] [2024-11-08 18:03:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:23,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:23,852 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 18:03:23,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:23,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277606871] [2024-11-08 18:03:23,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277606871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:03:23,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:03:23,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:03:23,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891334028] [2024-11-08 18:03:23,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:03:23,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:03:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:03:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:03:23,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 82 [2024-11-08 18:03:23,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 125 transitions, 763 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 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 18:03:23,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:23,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 82 [2024-11-08 18:03:23,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:25,384 INFO L124 PetriNetUnfolderBase]: 7051/11660 cut-off events. [2024-11-08 18:03:25,384 INFO L125 PetriNetUnfolderBase]: For 3006/3566 co-relation queries the response was YES. [2024-11-08 18:03:25,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24434 conditions, 11660 events. 7051/11660 cut-off events. For 3006/3566 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 83862 event pairs, 5580 based on Foata normal form. 0/8940 useless extension candidates. Maximal degree in co-relation 19826. Up to 9566 conditions per place. [2024-11-08 18:03:25,472 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 65 selfloop transitions, 9 changer transitions 0/123 dead transitions. [2024-11-08 18:03:25,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 123 transitions, 907 flow [2024-11-08 18:03:25,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:03:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:03:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 188 transitions. [2024-11-08 18:03:25,474 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-11-08 18:03:25,474 INFO L175 Difference]: Start difference. First operand has 117 places, 125 transitions, 763 flow. Second operand 4 states and 188 transitions. [2024-11-08 18:03:25,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 123 transitions, 907 flow [2024-11-08 18:03:25,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 123 transitions, 869 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-08 18:03:25,519 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 739 flow [2024-11-08 18:03:25,520 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=739, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-11-08 18:03:25,520 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 39 predicate places. [2024-11-08 18:03:25,521 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 739 flow [2024-11-08 18:03:25,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 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 18:03:25,521 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:25,521 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 18:03:25,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 18:03:25,522 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:25,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:25,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1399497523, now seen corresponding path program 1 times [2024-11-08 18:03:25,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:25,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198037742] [2024-11-08 18:03:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:25,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:25,606 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 18:03:25,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:25,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198037742] [2024-11-08 18:03:25,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198037742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:03:25,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:03:25,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:03:25,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146616249] [2024-11-08 18:03:25,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:03:25,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:03:25,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:25,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:03:25,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:03:25,692 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 82 [2024-11-08 18:03:25,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 739 flow. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:03:25,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:25,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 82 [2024-11-08 18:03:25,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:27,615 INFO L124 PetriNetUnfolderBase]: 8726/13871 cut-off events. [2024-11-08 18:03:27,615 INFO L125 PetriNetUnfolderBase]: For 2947/3967 co-relation queries the response was YES. [2024-11-08 18:03:27,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28451 conditions, 13871 events. 8726/13871 cut-off events. For 2947/3967 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 97651 event pairs, 6326 based on Foata normal form. 22/11149 useless extension candidates. Maximal degree in co-relation 22940. Up to 11355 conditions per place. [2024-11-08 18:03:27,700 INFO L140 encePairwiseOnDemand]: 67/82 looper letters, 104 selfloop transitions, 24 changer transitions 0/149 dead transitions. [2024-11-08 18:03:27,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 149 transitions, 1103 flow [2024-11-08 18:03:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:03:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:03:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 265 transitions. [2024-11-08 18:03:27,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5386178861788617 [2024-11-08 18:03:27,702 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 739 flow. Second operand 6 states and 265 transitions. [2024-11-08 18:03:27,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 149 transitions, 1103 flow [2024-11-08 18:03:27,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 149 transitions, 1093 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:03:27,721 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 788 flow [2024-11-08 18:03:27,722 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=788, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2024-11-08 18:03:27,723 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 44 predicate places. [2024-11-08 18:03:27,724 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 788 flow [2024-11-08 18:03:27,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:03:27,724 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:27,724 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-08 18:03:27,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 18:03:27,725 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:27,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1303291331, now seen corresponding path program 3 times [2024-11-08 18:03:27,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:27,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264518662] [2024-11-08 18:03:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:27,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:27,905 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 18:03:27,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:27,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264518662] [2024-11-08 18:03:27,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264518662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:03:27,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63372974] [2024-11-08 18:03:27,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:03:27,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:03:27,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:03:27,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:03:27,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:03:27,985 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 18:03:27,985 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:03:27,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 18:03:27,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:03:27,997 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 18:03:28,211 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2024-11-08 18:03:28,212 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 18:03:28,450 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 18:03:28,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:03:28,766 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 18:03:28,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63372974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:03:28,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:03:28,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-08 18:03:28,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828902798] [2024-11-08 18:03:28,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:03:28,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 18:03:28,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:28,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 18:03:28,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-08 18:03:30,278 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-08 18:03:30,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 788 flow. Second operand has 21 states, 21 states have (on average 30.19047619047619) internal successors, (634), 21 states have internal predecessors, (634), 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 18:03:30,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:30,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-08 18:03:30,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:34,758 INFO L124 PetriNetUnfolderBase]: 6791/12083 cut-off events. [2024-11-08 18:03:34,759 INFO L125 PetriNetUnfolderBase]: For 2915/3643 co-relation queries the response was YES. [2024-11-08 18:03:34,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24007 conditions, 12083 events. 6791/12083 cut-off events. For 2915/3643 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 91483 event pairs, 4716 based on Foata normal form. 8/9328 useless extension candidates. Maximal degree in co-relation 19369. Up to 6784 conditions per place. [2024-11-08 18:03:34,838 INFO L140 encePairwiseOnDemand]: 64/82 looper letters, 87 selfloop transitions, 66 changer transitions 2/176 dead transitions. [2024-11-08 18:03:34,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 176 transitions, 1279 flow [2024-11-08 18:03:34,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-08 18:03:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-08 18:03:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 911 transitions. [2024-11-08 18:03:34,843 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4114724480578139 [2024-11-08 18:03:34,843 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 788 flow. Second operand 27 states and 911 transitions. [2024-11-08 18:03:34,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 176 transitions, 1279 flow [2024-11-08 18:03:34,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 176 transitions, 1186 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-08 18:03:34,875 INFO L231 Difference]: Finished difference. Result has 136 places, 129 transitions, 898 flow [2024-11-08 18:03:34,876 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=898, PETRI_PLACES=136, PETRI_TRANSITIONS=129} [2024-11-08 18:03:34,876 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 61 predicate places. [2024-11-08 18:03:34,876 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 129 transitions, 898 flow [2024-11-08 18:03:34,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 30.19047619047619) internal successors, (634), 21 states have internal predecessors, (634), 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 18:03:34,877 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:34,877 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] [2024-11-08 18:03:34,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 18:03:35,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:03:35,082 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:35,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:35,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1715572261, now seen corresponding path program 1 times [2024-11-08 18:03:35,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:35,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340463132] [2024-11-08 18:03:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:35,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:35,335 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 18:03:35,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:35,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340463132] [2024-11-08 18:03:35,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340463132] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:03:35,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:03:35,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:03:35,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404328471] [2024-11-08 18:03:35,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:03:35,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:03:35,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:03:35,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:03:35,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2024-11-08 18:03:35,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 129 transitions, 898 flow. Second operand has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 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 18:03:35,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:35,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2024-11-08 18:03:35,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:37,359 INFO L124 PetriNetUnfolderBase]: 6087/11104 cut-off events. [2024-11-08 18:03:37,360 INFO L125 PetriNetUnfolderBase]: For 2779/3419 co-relation queries the response was YES. [2024-11-08 18:03:37,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21824 conditions, 11104 events. 6087/11104 cut-off events. For 2779/3419 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 84906 event pairs, 4114 based on Foata normal form. 0/8716 useless extension candidates. Maximal degree in co-relation 21772. Up to 7530 conditions per place. [2024-11-08 18:03:37,421 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 58 selfloop transitions, 14 changer transitions 0/127 dead transitions. [2024-11-08 18:03:37,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 127 transitions, 1038 flow [2024-11-08 18:03:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:03:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:03:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 219 transitions. [2024-11-08 18:03:37,423 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-11-08 18:03:37,423 INFO L175 Difference]: Start difference. First operand has 136 places, 129 transitions, 898 flow. Second operand 5 states and 219 transitions. [2024-11-08 18:03:37,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 127 transitions, 1038 flow [2024-11-08 18:03:37,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 127 transitions, 807 flow, removed 47 selfloop flow, removed 20 redundant places. [2024-11-08 18:03:37,450 INFO L231 Difference]: Finished difference. Result has 117 places, 127 transitions, 691 flow [2024-11-08 18:03:37,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=691, PETRI_PLACES=117, PETRI_TRANSITIONS=127} [2024-11-08 18:03:37,451 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 42 predicate places. [2024-11-08 18:03:37,452 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 127 transitions, 691 flow [2024-11-08 18:03:37,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 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 18:03:37,452 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:03:37,452 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] [2024-11-08 18:03:37,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 18:03:37,453 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:03:37,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:03:37,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1715572260, now seen corresponding path program 1 times [2024-11-08 18:03:37,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:03:37,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126225749] [2024-11-08 18:03:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:03:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:37,986 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 18:03:37,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:03:37,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126225749] [2024-11-08 18:03:37,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126225749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:03:37,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379834283] [2024-11-08 18:03:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:03:37,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:03:37,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:03:37,989 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:03:37,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 18:03:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:03:38,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 18:03:38,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:03:38,113 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 18:03:38,124 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 18:03:38,222 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:03:38,222 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 18:03:38,247 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:03:38,248 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 18:03:38,633 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-08 18:03:38,633 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 18:03:39,713 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 18:03:39,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:03:40,456 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 18:03:40,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379834283] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:03:40,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:03:40,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 17 [2024-11-08 18:03:40,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210857055] [2024-11-08 18:03:40,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:03:40,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:03:40,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:03:40,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:03:40,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-08 18:03:41,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 82 [2024-11-08 18:03:41,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 127 transitions, 691 flow. Second operand has 7 states, 7 states have (on average 40.857142857142854) internal successors, (286), 7 states have internal predecessors, (286), 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 18:03:41,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:03:41,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 82 [2024-11-08 18:03:41,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:03:49,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:03:53,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:03:58,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:02,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:06,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:07,140 INFO L124 PetriNetUnfolderBase]: 7932/13975 cut-off events. [2024-11-08 18:04:07,140 INFO L125 PetriNetUnfolderBase]: For 3285/4049 co-relation queries the response was YES. [2024-11-08 18:04:07,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27731 conditions, 13975 events. 7932/13975 cut-off events. For 3285/4049 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 105254 event pairs, 2723 based on Foata normal form. 0/10565 useless extension candidates. Maximal degree in co-relation 15524. Up to 6160 conditions per place. [2024-11-08 18:04:07,210 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 88 selfloop transitions, 25 changer transitions 0/167 dead transitions. [2024-11-08 18:04:07,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 167 transitions, 1045 flow [2024-11-08 18:04:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:04:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:04:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 352 transitions. [2024-11-08 18:04:07,212 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-11-08 18:04:07,213 INFO L175 Difference]: Start difference. First operand has 117 places, 127 transitions, 691 flow. Second operand 7 states and 352 transitions. [2024-11-08 18:04:07,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 167 transitions, 1045 flow [2024-11-08 18:04:07,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 167 transitions, 1026 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:04:07,237 INFO L231 Difference]: Finished difference. Result has 122 places, 131 transitions, 769 flow [2024-11-08 18:04:07,237 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=769, PETRI_PLACES=122, PETRI_TRANSITIONS=131} [2024-11-08 18:04:07,238 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 47 predicate places. [2024-11-08 18:04:07,238 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 131 transitions, 769 flow [2024-11-08 18:04:07,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.857142857142854) internal successors, (286), 7 states have internal predecessors, (286), 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 18:04:07,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:04:07,238 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] [2024-11-08 18:04:07,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 18:04:07,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:04:07,443 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:04:07,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:04:07,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1643131844, now seen corresponding path program 1 times [2024-11-08 18:04:07,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:04:07,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95425837] [2024-11-08 18:04:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:04:07,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:04:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:04:07,572 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 18:04:07,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:04:07,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95425837] [2024-11-08 18:04:07,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95425837] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:04:07,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:04:07,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:04:07,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304730576] [2024-11-08 18:04:07,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:04:07,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:04:07,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:04:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:04:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:04:07,604 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2024-11-08 18:04:07,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 131 transitions, 769 flow. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 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 18:04:07,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:04:07,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2024-11-08 18:04:07,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:04:08,837 INFO L124 PetriNetUnfolderBase]: 6148/11623 cut-off events. [2024-11-08 18:04:08,837 INFO L125 PetriNetUnfolderBase]: For 10611/11187 co-relation queries the response was YES. [2024-11-08 18:04:08,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26631 conditions, 11623 events. 6148/11623 cut-off events. For 10611/11187 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 89931 event pairs, 3812 based on Foata normal form. 344/9689 useless extension candidates. Maximal degree in co-relation 15437. Up to 7273 conditions per place. [2024-11-08 18:04:08,891 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 60 selfloop transitions, 15 changer transitions 0/129 dead transitions. [2024-11-08 18:04:08,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 129 transitions, 915 flow [2024-11-08 18:04:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:04:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:04:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 218 transitions. [2024-11-08 18:04:08,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-11-08 18:04:08,893 INFO L175 Difference]: Start difference. First operand has 122 places, 131 transitions, 769 flow. Second operand 5 states and 218 transitions. [2024-11-08 18:04:08,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 129 transitions, 915 flow [2024-11-08 18:04:08,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 129 transitions, 912 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:04:08,906 INFO L231 Difference]: Finished difference. Result has 123 places, 129 transitions, 792 flow [2024-11-08 18:04:08,906 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=792, PETRI_PLACES=123, PETRI_TRANSITIONS=129} [2024-11-08 18:04:08,906 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 48 predicate places. [2024-11-08 18:04:08,907 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 129 transitions, 792 flow [2024-11-08 18:04:08,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 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 18:04:08,907 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:04:08,907 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] [2024-11-08 18:04:08,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-08 18:04:08,907 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:04:08,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:04:08,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1643131843, now seen corresponding path program 1 times [2024-11-08 18:04:08,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:04:08,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280179349] [2024-11-08 18:04:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:04:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:04:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:04:09,133 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 18:04:09,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:04:09,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280179349] [2024-11-08 18:04:09,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280179349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:04:09,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644450661] [2024-11-08 18:04:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:04:09,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:04:09,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:04:09,136 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:04:09,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 18:04:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:04:09,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 18:04:09,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:04:09,248 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 18:04:09,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:04:09,313 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 18:04:09,324 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:04:09,324 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 18:04:09,401 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 18:04:09,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:04:09,542 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 18:04:09,620 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 18:04:09,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644450661] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:04:09,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:04:09,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-08 18:04:09,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024250729] [2024-11-08 18:04:09,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:04:09,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 18:04:09,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:04:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 18:04:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-08 18:04:10,135 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2024-11-08 18:04:10,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 792 flow. Second operand has 13 states, 13 states have (on average 38.46153846153846) internal successors, (500), 13 states have internal predecessors, (500), 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 18:04:10,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:04:10,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2024-11-08 18:04:10,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:04:11,905 INFO L124 PetriNetUnfolderBase]: 7968/13699 cut-off events. [2024-11-08 18:04:11,905 INFO L125 PetriNetUnfolderBase]: For 11252/12504 co-relation queries the response was YES. [2024-11-08 18:04:11,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32140 conditions, 13699 events. 7968/13699 cut-off events. For 11252/12504 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 100245 event pairs, 3851 based on Foata normal form. 400/11345 useless extension candidates. Maximal degree in co-relation 18535. Up to 7016 conditions per place. [2024-11-08 18:04:11,978 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 86 selfloop transitions, 28 changer transitions 0/167 dead transitions. [2024-11-08 18:04:11,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 167 transitions, 1138 flow [2024-11-08 18:04:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 18:04:11,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 18:04:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 372 transitions. [2024-11-08 18:04:11,979 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-11-08 18:04:11,980 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 792 flow. Second operand 8 states and 372 transitions. [2024-11-08 18:04:11,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 167 transitions, 1138 flow [2024-11-08 18:04:11,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 167 transitions, 1117 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:04:11,999 INFO L231 Difference]: Finished difference. Result has 128 places, 130 transitions, 842 flow [2024-11-08 18:04:11,999 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=842, PETRI_PLACES=128, PETRI_TRANSITIONS=130} [2024-11-08 18:04:12,000 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 53 predicate places. [2024-11-08 18:04:12,000 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 130 transitions, 842 flow [2024-11-08 18:04:12,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.46153846153846) internal successors, (500), 13 states have internal predecessors, (500), 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 18:04:12,000 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:04:12,000 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] [2024-11-08 18:04:12,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 18:04:12,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 18:04:12,201 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:04:12,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:04:12,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1477957231, now seen corresponding path program 1 times [2024-11-08 18:04:12,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:04:12,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001441963] [2024-11-08 18:04:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:04:12,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:04:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:04:12,835 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 18:04:12,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:04:12,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001441963] [2024-11-08 18:04:12,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001441963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:04:12,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615363732] [2024-11-08 18:04:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:04:12,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:04:12,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:04:12,838 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:04:12,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 18:04:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:04:12,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 18:04:12,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:04:12,949 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 18:04:12,958 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 18:04:13,034 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:04:13,034 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 18:04:13,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-08 18:04:13,224 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-08 18:04:13,224 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 18:04:14,278 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 18:04:14,278 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:04:14,839 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 18:04:14,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615363732] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:04:14,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:04:14,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 17 [2024-11-08 18:04:14,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102709173] [2024-11-08 18:04:14,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:04:14,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:04:14,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:04:14,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:04:14,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-08 18:04:18,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:22,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:26,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:30,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:35,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:39,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:43,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:47,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:51,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:55,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:04:55,337 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 82 [2024-11-08 18:04:55,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 130 transitions, 842 flow. Second operand has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 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 18:04:55,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:04:55,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 82 [2024-11-08 18:04:55,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:03,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:05:07,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:05:12,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:05:16,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:05:19,961 INFO L124 PetriNetUnfolderBase]: 30524/42899 cut-off events. [2024-11-08 18:05:19,962 INFO L125 PetriNetUnfolderBase]: For 37021/37885 co-relation queries the response was YES. [2024-11-08 18:05:20,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106988 conditions, 42899 events. 30524/42899 cut-off events. For 37021/37885 co-relation queries the response was YES. Maximal size of possible extension queue 1018. Compared 257174 event pairs, 9994 based on Foata normal form. 0/33810 useless extension candidates. Maximal degree in co-relation 64257. Up to 20714 conditions per place. [2024-11-08 18:05:20,167 INFO L140 encePairwiseOnDemand]: 70/82 looper letters, 108 selfloop transitions, 27 changer transitions 0/180 dead transitions. [2024-11-08 18:05:20,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 180 transitions, 1305 flow [2024-11-08 18:05:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:05:20,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:05:20,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 305 transitions. [2024-11-08 18:05:20,168 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5313588850174216 [2024-11-08 18:05:20,168 INFO L175 Difference]: Start difference. First operand has 128 places, 130 transitions, 842 flow. Second operand 7 states and 305 transitions. [2024-11-08 18:05:20,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 180 transitions, 1305 flow [2024-11-08 18:05:20,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 180 transitions, 1251 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 18:05:20,215 INFO L231 Difference]: Finished difference. Result has 131 places, 136 transitions, 913 flow [2024-11-08 18:05:20,216 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=913, PETRI_PLACES=131, PETRI_TRANSITIONS=136} [2024-11-08 18:05:20,216 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 56 predicate places. [2024-11-08 18:05:20,216 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 136 transitions, 913 flow [2024-11-08 18:05:20,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 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 18:05:20,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:20,217 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] [2024-11-08 18:05:20,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 18:05:20,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:20,417 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:05:20,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:20,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1477957229, now seen corresponding path program 1 times [2024-11-08 18:05:20,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:05:20,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710195680] [2024-11-08 18:05:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:20,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:05:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:20,656 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 18:05:20,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:05:20,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710195680] [2024-11-08 18:05:20,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710195680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:05:20,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103642812] [2024-11-08 18:05:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:20,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:20,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:20,659 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:20,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 18:05:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:20,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 18:05:20,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:20,777 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 18:05:20,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:05:20,847 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 18:05:20,855 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:05:20,855 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 18:05:20,940 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 18:05:20,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:05:21,091 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 18:05:21,171 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 18:05:21,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103642812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:05:21,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:05:21,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-08 18:05:21,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930850167] [2024-11-08 18:05:21,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:05:21,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 18:05:21,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:05:21,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 18:05:21,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-08 18:05:21,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 82 [2024-11-08 18:05:21,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 136 transitions, 913 flow. Second operand has 13 states, 13 states have (on average 39.53846153846154) internal successors, (514), 13 states have internal predecessors, (514), 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 18:05:21,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:21,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 82 [2024-11-08 18:05:21,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:24,335 INFO L124 PetriNetUnfolderBase]: 10324/17595 cut-off events. [2024-11-08 18:05:24,336 INFO L125 PetriNetUnfolderBase]: For 26222/28066 co-relation queries the response was YES. [2024-11-08 18:05:24,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50095 conditions, 17595 events. 10324/17595 cut-off events. For 26222/28066 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 131285 event pairs, 3360 based on Foata normal form. 0/14629 useless extension candidates. Maximal degree in co-relation 28933. Up to 6452 conditions per place. [2024-11-08 18:05:24,462 INFO L140 encePairwiseOnDemand]: 69/82 looper letters, 101 selfloop transitions, 31 changer transitions 0/186 dead transitions. [2024-11-08 18:05:24,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 186 transitions, 1385 flow [2024-11-08 18:05:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 18:05:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 18:05:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 426 transitions. [2024-11-08 18:05:24,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-11-08 18:05:24,464 INFO L175 Difference]: Start difference. First operand has 131 places, 136 transitions, 913 flow. Second operand 9 states and 426 transitions. [2024-11-08 18:05:24,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 186 transitions, 1385 flow [2024-11-08 18:05:24,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 186 transitions, 1354 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 18:05:24,501 INFO L231 Difference]: Finished difference. Result has 135 places, 136 transitions, 946 flow [2024-11-08 18:05:24,501 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=946, PETRI_PLACES=135, PETRI_TRANSITIONS=136} [2024-11-08 18:05:24,502 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 60 predicate places. [2024-11-08 18:05:24,502 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 136 transitions, 946 flow [2024-11-08 18:05:24,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 39.53846153846154) internal successors, (514), 13 states have internal predecessors, (514), 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 18:05:24,503 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:24,503 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] [2024-11-08 18:05:24,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 18:05:24,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 18:05:24,707 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:05:24,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:24,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1477957227, now seen corresponding path program 1 times [2024-11-08 18:05:24,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:05:24,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716424514] [2024-11-08 18:05:24,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:24,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:05:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:05:24,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:05:24,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716424514] [2024-11-08 18:05:24,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716424514] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:05:24,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100852820] [2024-11-08 18:05:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:24,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:24,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:24,952 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:24,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 18:05:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:25,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-08 18:05:25,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:25,067 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 18:05:25,301 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:05:25,301 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 18:05:25,358 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 18:05:25,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:05:25,498 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 18:05:25,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100852820] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:05:25,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:05:25,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-11-08 18:05:25,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048393410] [2024-11-08 18:05:25,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:25,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:05:25,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:05:25,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:05:25,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:05:25,748 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 82 [2024-11-08 18:05:25,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 136 transitions, 946 flow. Second operand has 7 states, 7 states have (on average 42.142857142857146) internal successors, (295), 7 states have internal predecessors, (295), 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 18:05:25,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:25,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 82 [2024-11-08 18:05:25,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:27,641 INFO L124 PetriNetUnfolderBase]: 9647/17074 cut-off events. [2024-11-08 18:05:27,641 INFO L125 PetriNetUnfolderBase]: For 31892/33344 co-relation queries the response was YES. [2024-11-08 18:05:27,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49606 conditions, 17074 events. 9647/17074 cut-off events. For 31892/33344 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 128937 event pairs, 3720 based on Foata normal form. 0/14740 useless extension candidates. Maximal degree in co-relation 28802. Up to 7718 conditions per place. [2024-11-08 18:05:27,752 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 96 selfloop transitions, 23 changer transitions 0/173 dead transitions. [2024-11-08 18:05:27,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 173 transitions, 1361 flow [2024-11-08 18:05:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:05:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:05:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 353 transitions. [2024-11-08 18:05:27,754 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6149825783972126 [2024-11-08 18:05:27,754 INFO L175 Difference]: Start difference. First operand has 135 places, 136 transitions, 946 flow. Second operand 7 states and 353 transitions. [2024-11-08 18:05:27,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 173 transitions, 1361 flow [2024-11-08 18:05:27,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 173 transitions, 1298 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-08 18:05:27,789 INFO L231 Difference]: Finished difference. Result has 136 places, 137 transitions, 971 flow [2024-11-08 18:05:27,789 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=971, PETRI_PLACES=136, PETRI_TRANSITIONS=137} [2024-11-08 18:05:27,789 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 61 predicate places. [2024-11-08 18:05:27,790 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 137 transitions, 971 flow [2024-11-08 18:05:27,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 42.142857142857146) internal successors, (295), 7 states have internal predecessors, (295), 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 18:05:27,790 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:27,790 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:27,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 18:05:27,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 18:05:27,995 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:05:27,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:27,995 INFO L85 PathProgramCache]: Analyzing trace with hash -797810794, now seen corresponding path program 1 times [2024-11-08 18:05:27,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:05:27,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550312916] [2024-11-08 18:05:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:27,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:05:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:05:28,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:05:28,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550312916] [2024-11-08 18:05:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550312916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:05:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252037615] [2024-11-08 18:05:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:28,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:28,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:28,117 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:28,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 18:05:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:28,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:05:28,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:05:28,327 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:05:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:05:28,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252037615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:05:28,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:05:28,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 18:05:28,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748208951] [2024-11-08 18:05:28,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:05:28,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:05:28,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:05:28,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:05:28,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:05:28,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 82 [2024-11-08 18:05:28,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 137 transitions, 971 flow. Second operand has 14 states, 14 states have (on average 30.214285714285715) internal successors, (423), 14 states have internal predecessors, (423), 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 18:05:28,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:28,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 82 [2024-11-08 18:05:28,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:31,833 INFO L124 PetriNetUnfolderBase]: 15546/23357 cut-off events. [2024-11-08 18:05:31,833 INFO L125 PetriNetUnfolderBase]: For 59176/60206 co-relation queries the response was YES. [2024-11-08 18:05:31,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73735 conditions, 23357 events. 15546/23357 cut-off events. For 59176/60206 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 157919 event pairs, 6567 based on Foata normal form. 256/20265 useless extension candidates. Maximal degree in co-relation 41638. Up to 9128 conditions per place. [2024-11-08 18:05:32,012 INFO L140 encePairwiseOnDemand]: 64/82 looper letters, 207 selfloop transitions, 54 changer transitions 0/276 dead transitions. [2024-11-08 18:05:32,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 276 transitions, 2257 flow [2024-11-08 18:05:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 18:05:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 18:05:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 510 transitions. [2024-11-08 18:05:32,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-11-08 18:05:32,015 INFO L175 Difference]: Start difference. First operand has 136 places, 137 transitions, 971 flow. Second operand 12 states and 510 transitions. [2024-11-08 18:05:32,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 276 transitions, 2257 flow [2024-11-08 18:05:32,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 276 transitions, 2241 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:05:32,058 INFO L231 Difference]: Finished difference. Result has 147 places, 144 transitions, 1130 flow [2024-11-08 18:05:32,058 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1130, PETRI_PLACES=147, PETRI_TRANSITIONS=144} [2024-11-08 18:05:32,059 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 72 predicate places. [2024-11-08 18:05:32,059 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 144 transitions, 1130 flow [2024-11-08 18:05:32,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.214285714285715) internal successors, (423), 14 states have internal predecessors, (423), 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 18:05:32,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:32,060 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 18:05:32,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 18:05:32,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:32,261 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:05:32,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:32,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2129620750, now seen corresponding path program 1 times [2024-11-08 18:05:32,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:05:32,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499469624] [2024-11-08 18:05:32,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:32,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:05:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:32,539 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 18:05:32,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:05:32,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499469624] [2024-11-08 18:05:32,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499469624] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:05:32,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:05:32,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:05:32,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583630088] [2024-11-08 18:05:32,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:32,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:05:32,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:05:32,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:05:32,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:05:32,543 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 82 [2024-11-08 18:05:32,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 144 transitions, 1130 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 18:05:32,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:32,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 82 [2024-11-08 18:05:32,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:35,210 INFO L124 PetriNetUnfolderBase]: 10901/18975 cut-off events. [2024-11-08 18:05:35,211 INFO L125 PetriNetUnfolderBase]: For 64588/65818 co-relation queries the response was YES. [2024-11-08 18:05:35,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62857 conditions, 18975 events. 10901/18975 cut-off events. For 64588/65818 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 149251 event pairs, 2752 based on Foata normal form. 7/17040 useless extension candidates. Maximal degree in co-relation 32897. Up to 9473 conditions per place. [2024-11-08 18:05:35,343 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 92 selfloop transitions, 3 changer transitions 23/171 dead transitions. [2024-11-08 18:05:35,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 171 transitions, 1519 flow [2024-11-08 18:05:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:05:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:05:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2024-11-08 18:05:35,345 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7276422764227642 [2024-11-08 18:05:35,345 INFO L175 Difference]: Start difference. First operand has 147 places, 144 transitions, 1130 flow. Second operand 3 states and 179 transitions. [2024-11-08 18:05:35,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 171 transitions, 1519 flow [2024-11-08 18:05:35,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 171 transitions, 1454 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-08 18:05:35,431 INFO L231 Difference]: Finished difference. Result has 145 places, 124 transitions, 822 flow [2024-11-08 18:05:35,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=822, PETRI_PLACES=145, PETRI_TRANSITIONS=124} [2024-11-08 18:05:35,431 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 70 predicate places. [2024-11-08 18:05:35,431 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 822 flow [2024-11-08 18:05:35,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 18:05:35,432 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:35,432 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 18:05:35,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-08 18:05:35,432 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:05:35,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:35,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1541574784, now seen corresponding path program 1 times [2024-11-08 18:05:35,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:05:35,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716670172] [2024-11-08 18:05:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:35,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:05:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:35,644 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 18:05:35,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:05:35,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716670172] [2024-11-08 18:05:35,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716670172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:05:35,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751314972] [2024-11-08 18:05:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:35,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:35,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:35,647 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:35,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 18:05:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:35,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-08 18:05:35,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:35,782 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 18:05:35,870 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:05:35,870 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 18:05:35,948 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 18:05:35,948 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:05:36,097 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 18:05:36,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751314972] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:05:36,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:05:36,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2024-11-08 18:05:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154055750] [2024-11-08 18:05:36,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:05:36,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:05:36,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:05:36,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:05:36,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-08 18:05:36,353 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 82 [2024-11-08 18:05:36,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 124 transitions, 822 flow. Second operand has 7 states, 7 states have (on average 42.42857142857143) internal successors, (297), 7 states have internal predecessors, (297), 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 18:05:36,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:36,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 82 [2024-11-08 18:05:36,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:39,325 INFO L124 PetriNetUnfolderBase]: 11416/21181 cut-off events. [2024-11-08 18:05:39,325 INFO L125 PetriNetUnfolderBase]: For 57547/58931 co-relation queries the response was YES. [2024-11-08 18:05:39,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63502 conditions, 21181 events. 11416/21181 cut-off events. For 57547/58931 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 181643 event pairs, 4124 based on Foata normal form. 548/19015 useless extension candidates. Maximal degree in co-relation 38548. Up to 7641 conditions per place. [2024-11-08 18:05:39,469 INFO L140 encePairwiseOnDemand]: 74/82 looper letters, 88 selfloop transitions, 13 changer transitions 0/154 dead transitions. [2024-11-08 18:05:39,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 154 transitions, 1226 flow [2024-11-08 18:05:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:05:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:05:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 337 transitions. [2024-11-08 18:05:39,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5871080139372822 [2024-11-08 18:05:39,471 INFO L175 Difference]: Start difference. First operand has 145 places, 124 transitions, 822 flow. Second operand 7 states and 337 transitions. [2024-11-08 18:05:39,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 154 transitions, 1226 flow [2024-11-08 18:05:39,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 154 transitions, 1106 flow, removed 14 selfloop flow, removed 16 redundant places. [2024-11-08 18:05:39,573 INFO L231 Difference]: Finished difference. Result has 125 places, 125 transitions, 778 flow [2024-11-08 18:05:39,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=778, PETRI_PLACES=125, PETRI_TRANSITIONS=125} [2024-11-08 18:05:39,573 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 50 predicate places. [2024-11-08 18:05:39,574 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 125 transitions, 778 flow [2024-11-08 18:05:39,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 42.42857142857143) internal successors, (297), 7 states have internal predecessors, (297), 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 18:05:39,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:39,574 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:39,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 18:05:39,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-08 18:05:39,775 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:05:39,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:39,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1088545139, now seen corresponding path program 1 times [2024-11-08 18:05:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:05:39,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887280581] [2024-11-08 18:05:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:39,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:05:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:05:39,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:05:39,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887280581] [2024-11-08 18:05:39,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887280581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:05:39,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377970378] [2024-11-08 18:05:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:39,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:39,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:39,895 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:39,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 18:05:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:40,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:05:40,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:05:40,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:05:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:05:40,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377970378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:05:40,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:05:40,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 18:05:40,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533728029] [2024-11-08 18:05:40,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:05:40,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:05:40,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:05:40,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:05:40,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:05:40,450 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 82 [2024-11-08 18:05:40,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 125 transitions, 778 flow. Second operand has 14 states, 14 states have (on average 30.428571428571427) internal successors, (426), 14 states have internal predecessors, (426), 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 18:05:40,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:40,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 82 [2024-11-08 18:05:40,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:43,268 INFO L124 PetriNetUnfolderBase]: 14476/22953 cut-off events. [2024-11-08 18:05:43,268 INFO L125 PetriNetUnfolderBase]: For 41507/42975 co-relation queries the response was YES. [2024-11-08 18:05:43,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68137 conditions, 22953 events. 14476/22953 cut-off events. For 41507/42975 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 163171 event pairs, 6408 based on Foata normal form. 0/19227 useless extension candidates. Maximal degree in co-relation 33967. Up to 10628 conditions per place. [2024-11-08 18:05:43,436 INFO L140 encePairwiseOnDemand]: 64/82 looper letters, 169 selfloop transitions, 45 changer transitions 0/232 dead transitions. [2024-11-08 18:05:43,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 232 transitions, 1725 flow [2024-11-08 18:05:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 18:05:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 18:05:43,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 484 transitions. [2024-11-08 18:05:43,438 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-11-08 18:05:43,438 INFO L175 Difference]: Start difference. First operand has 125 places, 125 transitions, 778 flow. Second operand 12 states and 484 transitions. [2024-11-08 18:05:43,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 232 transitions, 1725 flow [2024-11-08 18:05:43,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 232 transitions, 1692 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 18:05:43,471 INFO L231 Difference]: Finished difference. Result has 134 places, 132 transitions, 898 flow [2024-11-08 18:05:43,471 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=898, PETRI_PLACES=134, PETRI_TRANSITIONS=132} [2024-11-08 18:05:43,472 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 59 predicate places. [2024-11-08 18:05:43,472 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 132 transitions, 898 flow [2024-11-08 18:05:43,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.428571428571427) internal successors, (426), 14 states have internal predecessors, (426), 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 18:05:43,472 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:43,473 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:43,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 18:05:43,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:43,675 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:05:43,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:43,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1537392169, now seen corresponding path program 2 times [2024-11-08 18:05:43,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:05:43,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441866096] [2024-11-08 18:05:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:43,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:05:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 18:05:44,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:05:44,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441866096] [2024-11-08 18:05:44,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441866096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:05:44,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818458448] [2024-11-08 18:05:44,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:05:44,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:44,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:44,600 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:44,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 18:05:44,738 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:05:44,738 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:05:44,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-08 18:05:44,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:44,748 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 18:05:44,751 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 18:05:44,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:05:44,873 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 18:05:44,891 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-08 18:05:44,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-08 18:05:45,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:05:45,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 18:05:45,057 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-08 18:05:45,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-08 18:05:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 18:05:45,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:05:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 18:05:46,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818458448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:05:46,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:05:46,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-11-08 18:05:46,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168198205] [2024-11-08 18:05:46,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:05:46,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 18:05:46,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:05:46,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 18:05:46,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-08 18:05:47,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 82 [2024-11-08 18:05:47,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 132 transitions, 898 flow. Second operand has 25 states, 25 states have (on average 34.16) internal successors, (854), 25 states have internal predecessors, (854), 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 18:05:47,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:47,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 82 [2024-11-08 18:05:47,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:51,452 INFO L124 PetriNetUnfolderBase]: 12790/22847 cut-off events. [2024-11-08 18:05:51,452 INFO L125 PetriNetUnfolderBase]: For 44974/45228 co-relation queries the response was YES. [2024-11-08 18:05:51,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69328 conditions, 22847 events. 12790/22847 cut-off events. For 44974/45228 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 186932 event pairs, 3774 based on Foata normal form. 306/20671 useless extension candidates. Maximal degree in co-relation 38731. Up to 7344 conditions per place. [2024-11-08 18:05:51,660 INFO L140 encePairwiseOnDemand]: 70/82 looper letters, 166 selfloop transitions, 38 changer transitions 0/259 dead transitions. [2024-11-08 18:05:51,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 259 transitions, 1958 flow [2024-11-08 18:05:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 18:05:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 18:05:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 567 transitions. [2024-11-08 18:05:51,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5318949343339587 [2024-11-08 18:05:51,663 INFO L175 Difference]: Start difference. First operand has 134 places, 132 transitions, 898 flow. Second operand 13 states and 567 transitions. [2024-11-08 18:05:51,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 259 transitions, 1958 flow [2024-11-08 18:05:51,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 259 transitions, 1903 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-08 18:05:51,710 INFO L231 Difference]: Finished difference. Result has 145 places, 141 transitions, 1040 flow [2024-11-08 18:05:51,711 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1040, PETRI_PLACES=145, PETRI_TRANSITIONS=141} [2024-11-08 18:05:51,711 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 70 predicate places. [2024-11-08 18:05:51,711 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 141 transitions, 1040 flow [2024-11-08 18:05:51,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 34.16) internal successors, (854), 25 states have internal predecessors, (854), 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 18:05:51,712 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:51,712 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:51,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-08 18:05:51,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:51,913 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:05:51,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1922447664, now seen corresponding path program 1 times [2024-11-08 18:05:51,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:05:51,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197328860] [2024-11-08 18:05:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:51,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:05:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:05:52,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:05:52,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197328860] [2024-11-08 18:05:52,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197328860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:05:52,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282573755] [2024-11-08 18:05:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:52,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:52,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:52,077 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:52,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 18:05:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:52,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:05:52,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:05:52,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:05:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:05:52,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282573755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:05:52,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:05:52,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 18:05:52,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468352920] [2024-11-08 18:05:52,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:05:52,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:05:52,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:05:52,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:05:52,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:05:52,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 82 [2024-11-08 18:05:52,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 141 transitions, 1040 flow. Second operand has 14 states, 14 states have (on average 30.571428571428573) internal successors, (428), 14 states have internal predecessors, (428), 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 18:05:52,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:05:52,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 82 [2024-11-08 18:05:52,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:05:57,254 INFO L124 PetriNetUnfolderBase]: 19422/30777 cut-off events. [2024-11-08 18:05:57,254 INFO L125 PetriNetUnfolderBase]: For 111054/112902 co-relation queries the response was YES. [2024-11-08 18:05:57,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107517 conditions, 30777 events. 19422/30777 cut-off events. For 111054/112902 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 229014 event pairs, 7301 based on Foata normal form. 0/26900 useless extension candidates. Maximal degree in co-relation 59175. Up to 12308 conditions per place. [2024-11-08 18:05:57,488 INFO L140 encePairwiseOnDemand]: 65/82 looper letters, 191 selfloop transitions, 41 changer transitions 0/253 dead transitions. [2024-11-08 18:05:57,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 253 transitions, 2282 flow [2024-11-08 18:05:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 18:05:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 18:05:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 480 transitions. [2024-11-08 18:05:57,490 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-11-08 18:05:57,490 INFO L175 Difference]: Start difference. First operand has 145 places, 141 transitions, 1040 flow. Second operand 12 states and 480 transitions. [2024-11-08 18:05:57,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 253 transitions, 2282 flow [2024-11-08 18:05:57,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 253 transitions, 2223 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 18:05:57,554 INFO L231 Difference]: Finished difference. Result has 154 places, 146 transitions, 1117 flow [2024-11-08 18:05:57,554 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1117, PETRI_PLACES=154, PETRI_TRANSITIONS=146} [2024-11-08 18:05:57,555 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 79 predicate places. [2024-11-08 18:05:57,555 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 146 transitions, 1117 flow [2024-11-08 18:05:57,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.571428571428573) internal successors, (428), 14 states have internal predecessors, (428), 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 18:05:57,555 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:05:57,556 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:05:57,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-08 18:05:57,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:57,760 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:05:57,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:05:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash 414517648, now seen corresponding path program 1 times [2024-11-08 18:05:57,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:05:57,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746932504] [2024-11-08 18:05:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:57,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:05:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 18:05:58,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:05:58,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746932504] [2024-11-08 18:05:58,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746932504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:05:58,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318837338] [2024-11-08 18:05:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:05:58,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:05:58,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:05:58,456 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:05:58,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c48e1f6c-a45b-4915-88ff-fd47d9ad078f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 18:05:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:05:58,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-08 18:05:58,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:05:58,603 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 18:05:58,609 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 18:05:58,698 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:05:58,698 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 18:05:58,723 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 31 treesize of output 24 [2024-11-08 18:05:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 18:05:59,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:05:59,928 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 18:05:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 18:05:59,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318837338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:05:59,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:05:59,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2024-11-08 18:05:59,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463602728] [2024-11-08 18:05:59,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:05:59,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 18:05:59,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:05:59,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 18:05:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462