./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI --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 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:02:05,418 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:02:05,485 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:02:05,491 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:02:05,491 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:02:05,517 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:02:05,518 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:02:05,519 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:02:05,520 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:02:05,520 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:02:05,521 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:02:05,521 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:02:05,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:02:05,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:02:05,523 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:02:05,524 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:02:05,525 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:02:05,525 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:02:05,526 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:02:05,526 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:02:05,527 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:02:05,532 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:02:05,533 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:02:05,533 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:02:05,534 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:02:05,534 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:02:05,534 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:02:05,535 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:02:05,535 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:02:05,546 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:02:05,547 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:02:05,547 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:02:05,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:02:05,548 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:02:05,548 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:02:05,548 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:02:05,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:02:05,549 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:02:05,549 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:02:05,550 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:02:05,550 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:02:05,550 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_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 [2023-11-24 22:02:05,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:02:05,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:02:05,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:02:05,854 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:02:05,854 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:02:05,855 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2023-11-24 22:02:08,906 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:02:09,163 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:02:09,164 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2023-11-24 22:02:09,181 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/data/e25556abe/a28cb94ba86f498dbf2e46e08ef32957/FLAG21ba6483c [2023-11-24 22:02:09,195 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/data/e25556abe/a28cb94ba86f498dbf2e46e08ef32957 [2023-11-24 22:02:09,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:02:09,199 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:02:09,200 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:02:09,201 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:02:09,208 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:02:09,209 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c77f8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09, skipping insertion in model container [2023-11-24 22:02:09,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,281 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:02:09,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:02:09,646 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:02:09,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:02:09,748 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:02:09,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09 WrapperNode [2023-11-24 22:02:09,749 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:02:09,750 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:02:09,750 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:02:09,751 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:02:09,759 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,793 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,837 INFO L138 Inliner]: procedures = 169, calls = 41, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 156 [2023-11-24 22:02:09,838 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:02:09,838 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:02:09,839 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:02:09,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:02:09,851 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,872 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,897 INFO L175 MemorySlicer]: Split 18 memory accesses to 6 slices as follows [2, 1, 3, 8, 2, 2]. 44 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 1, 0, 8, 0, 0]. The 4 writes are split as follows [0, 0, 2, 0, 1, 1]. [2023-11-24 22:02:09,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,898 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,915 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,928 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,942 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,944 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:02:09,957 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:02:09,958 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:02:09,958 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:02:09,959 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (1/1) ... [2023-11-24 22:02:09,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:02:09,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:09,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:02:10,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:02:10,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:02:10,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:02:10,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:02:10,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 22:02:10,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 22:02:10,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-24 22:02:10,036 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-24 22:02:10,036 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-24 22:02:10,037 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-24 22:02:10,037 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-24 22:02:10,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:02:10,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:02:10,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:02:10,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 22:02:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 22:02:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-24 22:02:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 22:02:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:02:10,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:02:10,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:02:10,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-24 22:02:10,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-24 22:02:10,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-24 22:02:10,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-24 22:02:10,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-24 22:02:10,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-24 22:02:10,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:02:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:02:10,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:02:10,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 22:02:10,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 22:02:10,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-24 22:02:10,047 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 22:02:10,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:02:10,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:02:10,049 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 22:02:10,220 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:02:10,223 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:02:10,593 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:02:10,870 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:02:10,871 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 22:02:10,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:02:10 BoogieIcfgContainer [2023-11-24 22:02:10,871 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:02:10,876 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:02:10,877 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:02:10,881 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:02:10,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:02:09" (1/3) ... [2023-11-24 22:02:10,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517823a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:02:10, skipping insertion in model container [2023-11-24 22:02:10,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:09" (2/3) ... [2023-11-24 22:02:10,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517823a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:02:10, skipping insertion in model container [2023-11-24 22:02:10,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:02:10" (3/3) ... [2023-11-24 22:02:10,891 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2023-11-24 22:02:10,909 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:02:10,909 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-24 22:02:10,909 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:02:11,000 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 22:02:11,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 79 transitions, 172 flow [2023-11-24 22:02:11,114 INFO L124 PetriNetUnfolderBase]: 12/77 cut-off events. [2023-11-24 22:02:11,115 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 22:02:11,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 12/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 230 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2023-11-24 22:02:11,122 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 79 transitions, 172 flow [2023-11-24 22:02:11,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 76 transitions, 164 flow [2023-11-24 22:02:11,144 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:02:11,151 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@784bbb48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:02:11,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-11-24 22:02:11,155 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:02:11,155 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 22:02:11,155 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:02:11,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:11,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 22:02:11,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:11,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:11,161 INFO L85 PathProgramCache]: Analyzing trace with hash 14022, now seen corresponding path program 1 times [2023-11-24 22:02:11,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:11,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216260665] [2023-11-24 22:02:11,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:11,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:11,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:11,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216260665] [2023-11-24 22:02:11,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216260665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:11,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:11,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:11,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830892847] [2023-11-24 22:02:11,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:11,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:11,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:11,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:11,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-24 22:02:11,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2023-11-24 22:02:11,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:11,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-24 22:02:11,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:12,210 INFO L124 PetriNetUnfolderBase]: 920/1760 cut-off events. [2023-11-24 22:02:12,210 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-24 22:02:12,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3220 conditions, 1760 events. 920/1760 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10702 event pairs, 722 based on Foata normal form. 220/1764 useless extension candidates. Maximal degree in co-relation 3109. Up to 1416 conditions per place. [2023-11-24 22:02:12,235 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 34 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-24 22:02:12,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 65 transitions, 214 flow [2023-11-24 22:02:12,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-24 22:02:12,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780590717299579 [2023-11-24 22:02:12,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-24 22:02:12,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-24 22:02:12,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:12,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-24 22:02:12,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-11-24 22:02:12,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:12,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:12,271 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 164 flow. Second operand 3 states and 137 transitions. [2023-11-24 22:02:12,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 65 transitions, 214 flow [2023-11-24 22:02:12,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 22:02:12,284 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 138 flow [2023-11-24 22:02:12,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2023-11-24 22:02:12,293 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-11-24 22:02:12,294 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 138 flow [2023-11-24 22:02:12,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2023-11-24 22:02:12,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:12,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 22:02:12,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:02:12,295 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:12,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:12,296 INFO L85 PathProgramCache]: Analyzing trace with hash 14023, now seen corresponding path program 1 times [2023-11-24 22:02:12,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:12,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578211437] [2023-11-24 22:02:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:12,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:12,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:12,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578211437] [2023-11-24 22:02:12,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578211437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:12,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:12,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:12,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745243393] [2023-11-24 22:02:12,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:12,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:12,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:12,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:12,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2023-11-24 22:02:12,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2023-11-24 22:02:12,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:12,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2023-11-24 22:02:12,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:12,698 INFO L124 PetriNetUnfolderBase]: 570/1175 cut-off events. [2023-11-24 22:02:12,698 INFO L125 PetriNetUnfolderBase]: For 13/14 co-relation queries the response was YES. [2023-11-24 22:02:12,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103 conditions, 1175 events. 570/1175 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7004 event pairs, 435 based on Foata normal form. 157/1175 useless extension candidates. Maximal degree in co-relation 2093. Up to 909 conditions per place. [2023-11-24 22:02:12,711 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 32 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-24 22:02:12,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 202 flow [2023-11-24 22:02:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:12,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-24 22:02:12,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569620253164557 [2023-11-24 22:02:12,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-24 22:02:12,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-24 22:02:12,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:12,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-24 22:02:12,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:12,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:12,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:12,731 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 138 flow. Second operand 3 states and 135 transitions. [2023-11-24 22:02:12,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 202 flow [2023-11-24 22:02:12,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:02:12,734 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 134 flow [2023-11-24 22:02:12,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-11-24 22:02:12,735 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2023-11-24 22:02:12,736 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 134 flow [2023-11-24 22:02:12,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2023-11-24 22:02:12,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:12,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:02:12,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:02:12,737 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:12,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash 418196131, now seen corresponding path program 1 times [2023-11-24 22:02:12,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:12,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117715501] [2023-11-24 22:02:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:12,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:12,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117715501] [2023-11-24 22:02:12,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117715501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:12,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:12,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:12,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892707024] [2023-11-24 22:02:12,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:12,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:12,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:12,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:12,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:12,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-24 22:02:12,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2023-11-24 22:02:12,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:12,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-24 22:02:12,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:13,081 INFO L124 PetriNetUnfolderBase]: 599/1219 cut-off events. [2023-11-24 22:02:13,081 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-24 22:02:13,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2204 conditions, 1219 events. 599/1219 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7278 event pairs, 460 based on Foata normal form. 0/1074 useless extension candidates. Maximal degree in co-relation 2194. Up to 965 conditions per place. [2023-11-24 22:02:13,093 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 34 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-24 22:02:13,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 202 flow [2023-11-24 22:02:13,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2023-11-24 22:02:13,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527426160337553 [2023-11-24 22:02:13,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2023-11-24 22:02:13,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2023-11-24 22:02:13,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:13,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2023-11-24 22:02:13,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2023-11-24 22:02:13,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:13,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:13,100 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 134 flow. Second operand 3 states and 131 transitions. [2023-11-24 22:02:13,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 202 flow [2023-11-24 22:02:13,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:02:13,103 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 130 flow [2023-11-24 22:02:13,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-11-24 22:02:13,105 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -11 predicate places. [2023-11-24 22:02:13,105 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 130 flow [2023-11-24 22:02:13,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2023-11-24 22:02:13,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:13,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:02:13,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:02:13,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:13,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:13,108 INFO L85 PathProgramCache]: Analyzing trace with hash 418196132, now seen corresponding path program 1 times [2023-11-24 22:02:13,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:13,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283320951] [2023-11-24 22:02:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:13,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:13,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:13,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283320951] [2023-11-24 22:02:13,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283320951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:13,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:13,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:13,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668465292] [2023-11-24 22:02:13,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:13,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:13,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:13,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:13,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:13,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2023-11-24 22:02:13,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2023-11-24 22:02:13,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:13,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2023-11-24 22:02:13,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:13,453 INFO L124 PetriNetUnfolderBase]: 570/1163 cut-off events. [2023-11-24 22:02:13,453 INFO L125 PetriNetUnfolderBase]: For 13/14 co-relation queries the response was YES. [2023-11-24 22:02:13,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 1163 events. 570/1163 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6861 event pairs, 435 based on Foata normal form. 23/1041 useless extension candidates. Maximal degree in co-relation 2081. Up to 909 conditions per place. [2023-11-24 22:02:13,463 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 32 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-24 22:02:13,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 194 flow [2023-11-24 22:02:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-24 22:02:13,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569620253164557 [2023-11-24 22:02:13,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-24 22:02:13,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-24 22:02:13,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:13,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-24 22:02:13,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:13,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:13,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:13,468 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 130 flow. Second operand 3 states and 135 transitions. [2023-11-24 22:02:13,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 194 flow [2023-11-24 22:02:13,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:02:13,470 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 126 flow [2023-11-24 22:02:13,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-11-24 22:02:13,471 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2023-11-24 22:02:13,472 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 126 flow [2023-11-24 22:02:13,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2023-11-24 22:02:13,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:13,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:13,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:02:13,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:13,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:13,474 INFO L85 PathProgramCache]: Analyzing trace with hash -322109867, now seen corresponding path program 1 times [2023-11-24 22:02:13,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:13,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464567845] [2023-11-24 22:02:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:13,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:13,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:13,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464567845] [2023-11-24 22:02:13,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464567845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:13,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:13,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:02:13,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875758766] [2023-11-24 22:02:13,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:13,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:02:13,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:13,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:02:13,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:02:13,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-24 22:02:13,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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) [2023-11-24 22:02:13,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:13,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-24 22:02:13,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:13,918 INFO L124 PetriNetUnfolderBase]: 920/1670 cut-off events. [2023-11-24 22:02:13,918 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-24 22:02:13,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 1670 events. 920/1670 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9530 event pairs, 722 based on Foata normal form. 0/1508 useless extension candidates. Maximal degree in co-relation 3095. Up to 1416 conditions per place. [2023-11-24 22:02:13,930 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 34 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-24 22:02:13,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 194 flow [2023-11-24 22:02:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:13,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2023-11-24 22:02:13,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527426160337553 [2023-11-24 22:02:13,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2023-11-24 22:02:13,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2023-11-24 22:02:13,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:13,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2023-11-24 22:02:13,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2023-11-24 22:02:13,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:13,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:13,935 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 126 flow. Second operand 3 states and 131 transitions. [2023-11-24 22:02:13,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 194 flow [2023-11-24 22:02:13,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:02:13,938 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 122 flow [2023-11-24 22:02:13,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2023-11-24 22:02:13,941 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -15 predicate places. [2023-11-24 22:02:13,941 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 122 flow [2023-11-24 22:02:13,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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) [2023-11-24 22:02:13,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:13,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:13,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:02:13,942 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:13,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash -322109866, now seen corresponding path program 1 times [2023-11-24 22:02:13,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:13,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550759045] [2023-11-24 22:02:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:13,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:14,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:14,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550759045] [2023-11-24 22:02:14,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550759045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:14,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:14,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:14,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784181882] [2023-11-24 22:02:14,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:14,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:14,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:14,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:14,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 79 [2023-11-24 22:02:14,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:14,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:14,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 79 [2023-11-24 22:02:14,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:14,546 INFO L124 PetriNetUnfolderBase]: 1022/2023 cut-off events. [2023-11-24 22:02:14,546 INFO L125 PetriNetUnfolderBase]: For 14/15 co-relation queries the response was YES. [2023-11-24 22:02:14,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3649 conditions, 2023 events. 1022/2023 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 11968 event pairs, 368 based on Foata normal form. 0/1839 useless extension candidates. Maximal degree in co-relation 3635. Up to 902 conditions per place. [2023-11-24 22:02:14,562 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 61 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-24 22:02:14,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 85 transitions, 309 flow [2023-11-24 22:02:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2023-11-24 22:02:14,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7046413502109705 [2023-11-24 22:02:14,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2023-11-24 22:02:14,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2023-11-24 22:02:14,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:14,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2023-11-24 22:02:14,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2023-11-24 22:02:14,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:14,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:14,567 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 122 flow. Second operand 3 states and 167 transitions. [2023-11-24 22:02:14,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 85 transitions, 309 flow [2023-11-24 22:02:14,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 85 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:02:14,570 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 132 flow [2023-11-24 22:02:14,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-11-24 22:02:14,572 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -14 predicate places. [2023-11-24 22:02:14,572 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 132 flow [2023-11-24 22:02:14,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:14,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:14,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:14,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:02:14,573 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:14,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:14,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1017587041, now seen corresponding path program 1 times [2023-11-24 22:02:14,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:14,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066997291] [2023-11-24 22:02:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:14,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:14,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:14,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148113128] [2023-11-24 22:02:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:14,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:14,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:14,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:14,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:02:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:14,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:02:14,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:14,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:02:14,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:14,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066997291] [2023-11-24 22:02:14,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:14,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148113128] [2023-11-24 22:02:14,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148113128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:14,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:14,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:02:14,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116020977] [2023-11-24 22:02:14,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:14,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:02:14,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:14,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:02:14,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:02:15,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2023-11-24 22:02:15,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2023-11-24 22:02:15,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:15,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2023-11-24 22:02:15,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:16,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 22:02:16,647 INFO L124 PetriNetUnfolderBase]: 1060/2022 cut-off events. [2023-11-24 22:02:16,647 INFO L125 PetriNetUnfolderBase]: For 49/50 co-relation queries the response was YES. [2023-11-24 22:02:16,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3835 conditions, 2022 events. 1060/2022 cut-off events. For 49/50 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 11459 event pairs, 391 based on Foata normal form. 0/1840 useless extension candidates. Maximal degree in co-relation 1670. Up to 901 conditions per place. [2023-11-24 22:02:16,663 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 62 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-11-24 22:02:16,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 313 flow [2023-11-24 22:02:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:02:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:02:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2023-11-24 22:02:16,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6234177215189873 [2023-11-24 22:02:16,666 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 197 transitions. [2023-11-24 22:02:16,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 197 transitions. [2023-11-24 22:02:16,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:16,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 197 transitions. [2023-11-24 22:02:16,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:16,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 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) [2023-11-24 22:02:16,669 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 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) [2023-11-24 22:02:16,669 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 132 flow. Second operand 4 states and 197 transitions. [2023-11-24 22:02:16,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 313 flow [2023-11-24 22:02:16,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 83 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:16,672 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 128 flow [2023-11-24 22:02:16,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2023-11-24 22:02:16,673 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -15 predicate places. [2023-11-24 22:02:16,673 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 128 flow [2023-11-24 22:02:16,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2023-11-24 22:02:16,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:16,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:16,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:16,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:16,881 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:16,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1016631711, now seen corresponding path program 1 times [2023-11-24 22:02:16,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:16,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134762106] [2023-11-24 22:02:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:16,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:17,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:17,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134762106] [2023-11-24 22:02:17,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134762106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:17,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:17,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:02:17,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538006146] [2023-11-24 22:02:17,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:17,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:17,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:17,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:17,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:17,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-24 22:02:17,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:17,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:17,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-24 22:02:17,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:17,266 INFO L124 PetriNetUnfolderBase]: 739/1500 cut-off events. [2023-11-24 22:02:17,267 INFO L125 PetriNetUnfolderBase]: For 128/129 co-relation queries the response was YES. [2023-11-24 22:02:17,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2788 conditions, 1500 events. 739/1500 cut-off events. For 128/129 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 8321 event pairs, 204 based on Foata normal form. 23/1432 useless extension candidates. Maximal degree in co-relation 1018. Up to 771 conditions per place. [2023-11-24 22:02:17,278 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 54 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-24 22:02:17,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 77 transitions, 287 flow [2023-11-24 22:02:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-24 22:02:17,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6835443037974683 [2023-11-24 22:02:17,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-24 22:02:17,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-24 22:02:17,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:17,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-24 22:02:17,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2023-11-24 22:02:17,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:17,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:17,283 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 128 flow. Second operand 3 states and 162 transitions. [2023-11-24 22:02:17,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 77 transitions, 287 flow [2023-11-24 22:02:17,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 77 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:02:17,286 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 133 flow [2023-11-24 22:02:17,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-11-24 22:02:17,287 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -14 predicate places. [2023-11-24 22:02:17,287 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 133 flow [2023-11-24 22:02:17,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:17,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:17,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:17,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 22:02:17,288 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:17,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:17,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1226252065, now seen corresponding path program 1 times [2023-11-24 22:02:17,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:17,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736972944] [2023-11-24 22:02:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:17,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:17,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:17,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736972944] [2023-11-24 22:02:17,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736972944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:17,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:17,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:02:17,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85886313] [2023-11-24 22:02:17,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:17,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:17,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:17,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:17,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:17,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-24 22:02:17,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-11-24 22:02:17,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:17,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-24 22:02:17,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:17,615 INFO L124 PetriNetUnfolderBase]: 828/1694 cut-off events. [2023-11-24 22:02:17,615 INFO L125 PetriNetUnfolderBase]: For 116/133 co-relation queries the response was YES. [2023-11-24 22:02:17,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3189 conditions, 1694 events. 828/1694 cut-off events. For 116/133 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9240 event pairs, 358 based on Foata normal form. 28/1622 useless extension candidates. Maximal degree in co-relation 2495. Up to 783 conditions per place. [2023-11-24 22:02:17,629 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 53 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-11-24 22:02:17,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 296 flow [2023-11-24 22:02:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-24 22:02:17,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.679324894514768 [2023-11-24 22:02:17,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-24 22:02:17,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-24 22:02:17,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:17,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-24 22:02:17,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 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) [2023-11-24 22:02:17,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:17,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:17,633 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 133 flow. Second operand 3 states and 161 transitions. [2023-11-24 22:02:17,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 296 flow [2023-11-24 22:02:17,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:02:17,637 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 144 flow [2023-11-24 22:02:17,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-11-24 22:02:17,638 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2023-11-24 22:02:17,638 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 144 flow [2023-11-24 22:02:17,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-11-24 22:02:17,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:17,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:17,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 22:02:17,639 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:17,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1086733020, now seen corresponding path program 1 times [2023-11-24 22:02:17,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:17,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405097957] [2023-11-24 22:02:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:17,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:17,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:17,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072459364] [2023-11-24 22:02:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:17,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:17,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:17,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:17,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:02:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:17,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 22:02:17,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:17,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:02:17,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:17,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405097957] [2023-11-24 22:02:17,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:17,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072459364] [2023-11-24 22:02:17,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072459364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:17,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:17,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 22:02:17,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779537148] [2023-11-24 22:02:17,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:17,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:02:17,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:17,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:02:17,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:02:17,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 79 [2023-11-24 22:02:17,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:17,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:17,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 79 [2023-11-24 22:02:17,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:18,265 INFO L124 PetriNetUnfolderBase]: 1070/2133 cut-off events. [2023-11-24 22:02:18,266 INFO L125 PetriNetUnfolderBase]: For 208/210 co-relation queries the response was YES. [2023-11-24 22:02:18,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4212 conditions, 2133 events. 1070/2133 cut-off events. For 208/210 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 12304 event pairs, 354 based on Foata normal form. 0/2021 useless extension candidates. Maximal degree in co-relation 1567. Up to 914 conditions per place. [2023-11-24 22:02:18,282 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 100 selfloop transitions, 6 changer transitions 0/126 dead transitions. [2023-11-24 22:02:18,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 126 transitions, 533 flow [2023-11-24 22:02:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 22:02:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 22:02:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 308 transitions. [2023-11-24 22:02:18,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6497890295358649 [2023-11-24 22:02:18,285 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 308 transitions. [2023-11-24 22:02:18,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 308 transitions. [2023-11-24 22:02:18,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:18,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 308 transitions. [2023-11-24 22:02:18,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 51.333333333333336) internal successors, (308), 6 states have internal predecessors, (308), 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) [2023-11-24 22:02:18,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 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) [2023-11-24 22:02:18,289 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 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) [2023-11-24 22:02:18,289 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 144 flow. Second operand 6 states and 308 transitions. [2023-11-24 22:02:18,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 126 transitions, 533 flow [2023-11-24 22:02:18,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 126 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:18,295 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 169 flow [2023-11-24 22:02:18,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=169, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-11-24 22:02:18,297 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-11-24 22:02:18,297 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 169 flow [2023-11-24 22:02:18,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:18,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:18,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:18,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:18,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 22:02:18,503 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:18,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2014516547, now seen corresponding path program 1 times [2023-11-24 22:02:18,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:18,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908523171] [2023-11-24 22:02:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:18,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:18,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:18,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908523171] [2023-11-24 22:02:18,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908523171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:18,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:18,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:02:18,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935983803] [2023-11-24 22:02:18,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:18,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:18,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:18,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:18,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:18,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-24 22:02:18,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-11-24 22:02:18,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:18,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-24 22:02:18,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:18,911 INFO L124 PetriNetUnfolderBase]: 1256/2526 cut-off events. [2023-11-24 22:02:18,912 INFO L125 PetriNetUnfolderBase]: For 449/470 co-relation queries the response was YES. [2023-11-24 22:02:18,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5475 conditions, 2526 events. 1256/2526 cut-off events. For 449/470 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 15435 event pairs, 605 based on Foata normal form. 22/2381 useless extension candidates. Maximal degree in co-relation 2225. Up to 1670 conditions per place. [2023-11-24 22:02:18,938 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 60 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-11-24 22:02:18,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 84 transitions, 372 flow [2023-11-24 22:02:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2023-11-24 22:02:18,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6877637130801688 [2023-11-24 22:02:18,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2023-11-24 22:02:18,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2023-11-24 22:02:18,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:18,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2023-11-24 22:02:18,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2023-11-24 22:02:18,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:18,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:18,943 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 169 flow. Second operand 3 states and 163 transitions. [2023-11-24 22:02:18,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 84 transitions, 372 flow [2023-11-24 22:02:18,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:18,947 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 189 flow [2023-11-24 22:02:18,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-11-24 22:02:18,948 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-11-24 22:02:18,949 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 189 flow [2023-11-24 22:02:18,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-11-24 22:02:18,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:18,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:18,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 22:02:18,951 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:18,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash 705959460, now seen corresponding path program 1 times [2023-11-24 22:02:18,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:18,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255315006] [2023-11-24 22:02:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:18,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:18,969 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:18,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284426214] [2023-11-24 22:02:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:18,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:18,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:18,977 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:19,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:02:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:19,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 22:02:19,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:19,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:19,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:19,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255315006] [2023-11-24 22:02:19,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:19,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284426214] [2023-11-24 22:02:19,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284426214] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 22:02:19,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:02:19,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-24 22:02:19,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462523940] [2023-11-24 22:02:19,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:19,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:19,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:19,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:19,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:02:19,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 79 [2023-11-24 22:02:19,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-11-24 22:02:19,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:19,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 79 [2023-11-24 22:02:19,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:19,493 INFO L124 PetriNetUnfolderBase]: 967/1917 cut-off events. [2023-11-24 22:02:19,494 INFO L125 PetriNetUnfolderBase]: For 478/495 co-relation queries the response was YES. [2023-11-24 22:02:19,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4186 conditions, 1917 events. 967/1917 cut-off events. For 478/495 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 9811 event pairs, 341 based on Foata normal form. 11/1852 useless extension candidates. Maximal degree in co-relation 3147. Up to 984 conditions per place. [2023-11-24 22:02:19,504 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 55 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-11-24 22:02:19,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 355 flow [2023-11-24 22:02:19,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-11-24 22:02:19,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6455696202531646 [2023-11-24 22:02:19,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-11-24 22:02:19,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-11-24 22:02:19,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:19,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-11-24 22:02:19,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2023-11-24 22:02:19,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:19,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:19,509 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 189 flow. Second operand 3 states and 153 transitions. [2023-11-24 22:02:19,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 355 flow [2023-11-24 22:02:19,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 346 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-24 22:02:19,513 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 195 flow [2023-11-24 22:02:19,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-11-24 22:02:19,514 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-11-24 22:02:19,515 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 195 flow [2023-11-24 22:02:19,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-11-24 22:02:19,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:19,515 INFO L208 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] [2023-11-24 22:02:19,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:19,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 22:02:19,721 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:19,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:19,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1959303353, now seen corresponding path program 1 times [2023-11-24 22:02:19,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:19,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708140370] [2023-11-24 22:02:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:19,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:19,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:19,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708140370] [2023-11-24 22:02:19,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708140370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:19,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:19,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:02:19,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953975791] [2023-11-24 22:02:19,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:19,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:19,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:19,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:19,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:19,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-24 22:02:19,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:19,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:19,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-24 22:02:19,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:20,195 INFO L124 PetriNetUnfolderBase]: 1357/2774 cut-off events. [2023-11-24 22:02:20,195 INFO L125 PetriNetUnfolderBase]: For 905/917 co-relation queries the response was YES. [2023-11-24 22:02:20,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6114 conditions, 2774 events. 1357/2774 cut-off events. For 905/917 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 16637 event pairs, 689 based on Foata normal form. 50/2711 useless extension candidates. Maximal degree in co-relation 4747. Up to 1510 conditions per place. [2023-11-24 22:02:20,245 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 68 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-11-24 22:02:20,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 453 flow [2023-11-24 22:02:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-11-24 22:02:20,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6919831223628692 [2023-11-24 22:02:20,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-11-24 22:02:20,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-11-24 22:02:20,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:20,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-11-24 22:02:20,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2023-11-24 22:02:20,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:20,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:20,249 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 195 flow. Second operand 3 states and 164 transitions. [2023-11-24 22:02:20,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 453 flow [2023-11-24 22:02:20,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 443 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:02:20,257 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 201 flow [2023-11-24 22:02:20,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2023-11-24 22:02:20,258 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-11-24 22:02:20,258 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 201 flow [2023-11-24 22:02:20,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:20,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:20,260 INFO L208 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] [2023-11-24 22:02:20,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 22:02:20,261 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:20,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash -306064342, now seen corresponding path program 1 times [2023-11-24 22:02:20,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:20,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580849993] [2023-11-24 22:02:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:20,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:20,286 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:20,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359113622] [2023-11-24 22:02:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:20,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:20,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:20,288 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:20,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:02:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:20,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 22:02:20,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:20,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-24 22:02:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:20,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:02:20,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:20,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580849993] [2023-11-24 22:02:20,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:20,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359113622] [2023-11-24 22:02:20,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359113622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:20,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:20,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:02:20,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790753864] [2023-11-24 22:02:20,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:20,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:20,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:20,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:20,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:20,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-24 22:02:20,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:20,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:20,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-24 22:02:20,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:20,802 INFO L124 PetriNetUnfolderBase]: 886/2028 cut-off events. [2023-11-24 22:02:20,802 INFO L125 PetriNetUnfolderBase]: For 981/981 co-relation queries the response was YES. [2023-11-24 22:02:20,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4777 conditions, 2028 events. 886/2028 cut-off events. For 981/981 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 11348 event pairs, 268 based on Foata normal form. 98/2073 useless extension candidates. Maximal degree in co-relation 3099. Up to 922 conditions per place. [2023-11-24 22:02:20,817 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 50 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-11-24 22:02:20,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 369 flow [2023-11-24 22:02:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-11-24 22:02:20,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329113924050633 [2023-11-24 22:02:20,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-11-24 22:02:20,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-11-24 22:02:20,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:20,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-11-24 22:02:20,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2023-11-24 22:02:20,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:20,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-11-24 22:02:20,822 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 201 flow. Second operand 3 states and 150 transitions. [2023-11-24 22:02:20,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 369 flow [2023-11-24 22:02:20,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 76 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:20,829 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 207 flow [2023-11-24 22:02:20,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=207, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-11-24 22:02:20,830 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2023-11-24 22:02:20,830 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 207 flow [2023-11-24 22:02:20,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:20,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:20,832 INFO L208 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] [2023-11-24 22:02:20,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:21,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 22:02:21,038 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:21,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:21,038 INFO L85 PathProgramCache]: Analyzing trace with hash -721581730, now seen corresponding path program 1 times [2023-11-24 22:02:21,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:21,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671565112] [2023-11-24 22:02:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:21,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:21,059 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:21,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117114803] [2023-11-24 22:02:21,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:21,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:21,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:21,061 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:21,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:02:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:21,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 22:02:21,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:21,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:02:21,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:21,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671565112] [2023-11-24 22:02:21,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:21,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117114803] [2023-11-24 22:02:21,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117114803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:21,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:21,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:02:21,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976598749] [2023-11-24 22:02:21,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:21,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:02:21,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:21,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:02:21,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:02:21,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 79 [2023-11-24 22:02:21,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:21,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:21,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 79 [2023-11-24 22:02:21,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:22,230 INFO L124 PetriNetUnfolderBase]: 1715/3722 cut-off events. [2023-11-24 22:02:22,231 INFO L125 PetriNetUnfolderBase]: For 2129/2137 co-relation queries the response was YES. [2023-11-24 22:02:22,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9236 conditions, 3722 events. 1715/3722 cut-off events. For 2129/2137 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 21840 event pairs, 528 based on Foata normal form. 2/3566 useless extension candidates. Maximal degree in co-relation 3646. Up to 1083 conditions per place. [2023-11-24 22:02:22,263 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 115 selfloop transitions, 4 changer transitions 0/140 dead transitions. [2023-11-24 22:02:22,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 140 transitions, 737 flow [2023-11-24 22:02:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:02:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:02:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 275 transitions. [2023-11-24 22:02:22,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962025316455697 [2023-11-24 22:02:22,265 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 275 transitions. [2023-11-24 22:02:22,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 275 transitions. [2023-11-24 22:02:22,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:22,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 275 transitions. [2023-11-24 22:02:22,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 55.0) internal successors, (275), 5 states have internal predecessors, (275), 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) [2023-11-24 22:02:22,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 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) [2023-11-24 22:02:22,270 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 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) [2023-11-24 22:02:22,271 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 207 flow. Second operand 5 states and 275 transitions. [2023-11-24 22:02:22,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 140 transitions, 737 flow [2023-11-24 22:02:22,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 140 transitions, 721 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:22,279 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 221 flow [2023-11-24 22:02:22,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2023-11-24 22:02:22,281 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-11-24 22:02:22,281 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 221 flow [2023-11-24 22:02:22,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:22,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:22,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:22,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-24 22:02:22,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 22:02:22,488 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:22,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:22,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1214067225, now seen corresponding path program 1 times [2023-11-24 22:02:22,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:22,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036752524] [2023-11-24 22:02:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:22,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:22,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:22,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8840684] [2023-11-24 22:02:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:22,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:22,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:22,524 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:22,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 22:02:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:22,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:02:22,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:23,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:02:23,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:23,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036752524] [2023-11-24 22:02:23,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:23,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8840684] [2023-11-24 22:02:23,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8840684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:23,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:23,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:02:23,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358007988] [2023-11-24 22:02:23,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:23,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:02:23,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:02:23,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:02:23,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-24 22:02:23,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 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) [2023-11-24 22:02:23,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:23,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-24 22:02:23,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:23,535 INFO L124 PetriNetUnfolderBase]: 1285/2841 cut-off events. [2023-11-24 22:02:23,535 INFO L125 PetriNetUnfolderBase]: For 1499/1505 co-relation queries the response was YES. [2023-11-24 22:02:23,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6913 conditions, 2841 events. 1285/2841 cut-off events. For 1499/1505 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 15418 event pairs, 436 based on Foata normal form. 20/2784 useless extension candidates. Maximal degree in co-relation 2689. Up to 1432 conditions per place. [2023-11-24 22:02:23,558 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 74 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2023-11-24 22:02:23,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 503 flow [2023-11-24 22:02:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:02:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:02:23,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 208 transitions. [2023-11-24 22:02:23,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6582278481012658 [2023-11-24 22:02:23,561 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 208 transitions. [2023-11-24 22:02:23,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 208 transitions. [2023-11-24 22:02:23,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:23,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 208 transitions. [2023-11-24 22:02:23,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2023-11-24 22:02:23,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 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) [2023-11-24 22:02:23,564 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 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) [2023-11-24 22:02:23,564 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 221 flow. Second operand 4 states and 208 transitions. [2023-11-24 22:02:23,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 503 flow [2023-11-24 22:02:23,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 501 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:23,570 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 229 flow [2023-11-24 22:02:23,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2023-11-24 22:02:23,571 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2023-11-24 22:02:23,572 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 229 flow [2023-11-24 22:02:23,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 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) [2023-11-24 22:02:23,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:23,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:23,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:23,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 22:02:23,779 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:23,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:23,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1105779329, now seen corresponding path program 1 times [2023-11-24 22:02:23,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:23,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758560934] [2023-11-24 22:02:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:23,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:23,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:23,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758560934] [2023-11-24 22:02:23,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758560934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:02:23,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495895803] [2023-11-24 22:02:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:23,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:23,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:23,893 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:23,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 22:02:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:24,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:02:24,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:24,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:24,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495895803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:24,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:02:24,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-24 22:02:24,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867371949] [2023-11-24 22:02:24,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:24,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:02:24,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:24,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:02:24,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:02:24,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 79 [2023-11-24 22:02:24,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 39.42857142857143) internal successors, (276), 7 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:24,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:24,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 79 [2023-11-24 22:02:24,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:25,137 INFO L124 PetriNetUnfolderBase]: 3175/6514 cut-off events. [2023-11-24 22:02:25,137 INFO L125 PetriNetUnfolderBase]: For 3402/3404 co-relation queries the response was YES. [2023-11-24 22:02:25,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16141 conditions, 6514 events. 3175/6514 cut-off events. For 3402/3404 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 41479 event pairs, 362 based on Foata normal form. 326/6696 useless extension candidates. Maximal degree in co-relation 7725. Up to 1693 conditions per place. [2023-11-24 22:02:25,188 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 141 selfloop transitions, 10 changer transitions 0/172 dead transitions. [2023-11-24 22:02:25,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 172 transitions, 933 flow [2023-11-24 22:02:25,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 22:02:25,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 22:02:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 336 transitions. [2023-11-24 22:02:25,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7088607594936709 [2023-11-24 22:02:25,191 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 336 transitions. [2023-11-24 22:02:25,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 336 transitions. [2023-11-24 22:02:25,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:25,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 336 transitions. [2023-11-24 22:02:25,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2023-11-24 22:02:25,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 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) [2023-11-24 22:02:25,195 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 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) [2023-11-24 22:02:25,195 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 229 flow. Second operand 6 states and 336 transitions. [2023-11-24 22:02:25,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 172 transitions, 933 flow [2023-11-24 22:02:25,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 172 transitions, 919 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 22:02:25,206 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 294 flow [2023-11-24 22:02:25,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2023-11-24 22:02:25,207 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2023-11-24 22:02:25,207 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 294 flow [2023-11-24 22:02:25,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.42857142857143) internal successors, (276), 7 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:25,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:25,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:25,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:25,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 22:02:25,414 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:25,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:25,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1201247367, now seen corresponding path program 1 times [2023-11-24 22:02:25,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:25,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269243522] [2023-11-24 22:02:25,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:25,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:25,435 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:25,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447940159] [2023-11-24 22:02:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:25,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:25,437 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:25,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 22:02:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:25,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 22:02:25,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:25,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-11-24 22:02:25,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 57 treesize of output 43 [2023-11-24 22:02:25,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2023-11-24 22:02:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:26,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:02:26,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:26,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269243522] [2023-11-24 22:02:26,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:26,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447940159] [2023-11-24 22:02:26,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447940159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:26,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:26,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 22:02:26,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236310289] [2023-11-24 22:02:26,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:26,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 22:02:26,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 22:02:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 22:02:26,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-24 22:02:26,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 294 flow. Second operand has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 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) [2023-11-24 22:02:26,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:26,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-24 22:02:26,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:27,922 INFO L124 PetriNetUnfolderBase]: 3887/8509 cut-off events. [2023-11-24 22:02:27,922 INFO L125 PetriNetUnfolderBase]: For 10271/10287 co-relation queries the response was YES. [2023-11-24 22:02:27,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23526 conditions, 8509 events. 3887/8509 cut-off events. For 10271/10287 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 61229 event pairs, 1481 based on Foata normal form. 0/8258 useless extension candidates. Maximal degree in co-relation 20740. Up to 2222 conditions per place. [2023-11-24 22:02:27,993 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 150 selfloop transitions, 18 changer transitions 0/191 dead transitions. [2023-11-24 22:02:27,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 191 transitions, 1160 flow [2023-11-24 22:02:27,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 22:02:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-24 22:02:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 530 transitions. [2023-11-24 22:02:27,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098964326812428 [2023-11-24 22:02:27,996 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 530 transitions. [2023-11-24 22:02:27,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 530 transitions. [2023-11-24 22:02:27,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:27,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 530 transitions. [2023-11-24 22:02:27,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 48.18181818181818) internal successors, (530), 11 states have internal predecessors, (530), 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) [2023-11-24 22:02:28,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 79.0) internal successors, (948), 12 states have internal predecessors, (948), 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) [2023-11-24 22:02:28,001 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 79.0) internal successors, (948), 12 states have internal predecessors, (948), 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) [2023-11-24 22:02:28,001 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 294 flow. Second operand 11 states and 530 transitions. [2023-11-24 22:02:28,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 191 transitions, 1160 flow [2023-11-24 22:02:28,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 191 transitions, 1121 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:28,031 INFO L231 Difference]: Finished difference. Result has 100 places, 83 transitions, 428 flow [2023-11-24 22:02:28,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=428, PETRI_PLACES=100, PETRI_TRANSITIONS=83} [2023-11-24 22:02:28,032 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 29 predicate places. [2023-11-24 22:02:28,032 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 83 transitions, 428 flow [2023-11-24 22:02:28,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 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) [2023-11-24 22:02:28,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:28,032 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:28,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:28,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-24 22:02:28,239 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:28,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:28,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1861326933, now seen corresponding path program 1 times [2023-11-24 22:02:28,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:28,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135718443] [2023-11-24 22:02:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:28,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:28,259 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:28,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454651134] [2023-11-24 22:02:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:28,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:28,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:28,261 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:28,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 22:02:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:28,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 22:02:28,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:28,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:28,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:28,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-24 22:02:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:29,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:30,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:30,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135718443] [2023-11-24 22:02:30,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:30,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454651134] [2023-11-24 22:02:30,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454651134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:30,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:02:30,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-24 22:02:30,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381140828] [2023-11-24 22:02:30,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:30,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 22:02:30,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:30,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 22:02:30,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-24 22:02:30,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 79 [2023-11-24 22:02:30,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 83 transitions, 428 flow. Second operand has 8 states, 8 states have (on average 39.0) internal successors, (312), 8 states have internal predecessors, (312), 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) [2023-11-24 22:02:30,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:30,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 79 [2023-11-24 22:02:30,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:32,014 INFO L124 PetriNetUnfolderBase]: 2916/6351 cut-off events. [2023-11-24 22:02:32,014 INFO L125 PetriNetUnfolderBase]: For 7819/7843 co-relation queries the response was YES. [2023-11-24 22:02:32,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18275 conditions, 6351 events. 2916/6351 cut-off events. For 7819/7843 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 40233 event pairs, 1705 based on Foata normal form. 132/6344 useless extension candidates. Maximal degree in co-relation 11349. Up to 3347 conditions per place. [2023-11-24 22:02:32,072 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 76 selfloop transitions, 6 changer transitions 0/100 dead transitions. [2023-11-24 22:02:32,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 100 transitions, 697 flow [2023-11-24 22:02:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:02:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:02:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 184 transitions. [2023-11-24 22:02:32,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822784810126582 [2023-11-24 22:02:32,074 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 184 transitions. [2023-11-24 22:02:32,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 184 transitions. [2023-11-24 22:02:32,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:32,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 184 transitions. [2023-11-24 22:02:32,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 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) [2023-11-24 22:02:32,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 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) [2023-11-24 22:02:32,077 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 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) [2023-11-24 22:02:32,077 INFO L175 Difference]: Start difference. First operand has 100 places, 83 transitions, 428 flow. Second operand 4 states and 184 transitions. [2023-11-24 22:02:32,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 100 transitions, 697 flow [2023-11-24 22:02:32,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 666 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-24 22:02:32,106 INFO L231 Difference]: Finished difference. Result has 92 places, 75 transitions, 387 flow [2023-11-24 22:02:32,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=387, PETRI_PLACES=92, PETRI_TRANSITIONS=75} [2023-11-24 22:02:32,107 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 21 predicate places. [2023-11-24 22:02:32,107 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 75 transitions, 387 flow [2023-11-24 22:02:32,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 39.0) internal successors, (312), 8 states have internal predecessors, (312), 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) [2023-11-24 22:02:32,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:32,108 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:32,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:32,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:32,315 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:32,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:32,316 INFO L85 PathProgramCache]: Analyzing trace with hash -910494735, now seen corresponding path program 2 times [2023-11-24 22:02:32,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:32,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924686087] [2023-11-24 22:02:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:32,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 22:02:32,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:32,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924686087] [2023-11-24 22:02:32,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924686087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:02:32,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722411804] [2023-11-24 22:02:32,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:02:32,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:32,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:32,535 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:32,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 22:02:32,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-24 22:02:32,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:02:32,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:02:32,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-24 22:02:33,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:02:33,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722411804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:33,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:02:33,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-11-24 22:02:33,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993989400] [2023-11-24 22:02:33,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:33,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:02:33,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:33,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:02:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2023-11-24 22:02:34,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 79 [2023-11-24 22:02:34,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 75 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:34,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:34,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 79 [2023-11-24 22:02:34,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:35,872 INFO L124 PetriNetUnfolderBase]: 4542/9376 cut-off events. [2023-11-24 22:02:35,872 INFO L125 PetriNetUnfolderBase]: For 11003/11003 co-relation queries the response was YES. [2023-11-24 22:02:35,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26643 conditions, 9376 events. 4542/9376 cut-off events. For 11003/11003 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 62948 event pairs, 3703 based on Foata normal form. 12/9156 useless extension candidates. Maximal degree in co-relation 22550. Up to 7329 conditions per place. [2023-11-24 22:02:36,027 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 52 selfloop transitions, 1 changer transitions 3/74 dead transitions. [2023-11-24 22:02:36,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 74 transitions, 497 flow [2023-11-24 22:02:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:02:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:02:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2023-11-24 22:02:36,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588607594936709 [2023-11-24 22:02:36,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 145 transitions. [2023-11-24 22:02:36,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 145 transitions. [2023-11-24 22:02:36,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:36,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 145 transitions. [2023-11-24 22:02:36,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2023-11-24 22:02:36,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 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) [2023-11-24 22:02:36,042 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 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) [2023-11-24 22:02:36,042 INFO L175 Difference]: Start difference. First operand has 92 places, 75 transitions, 387 flow. Second operand 4 states and 145 transitions. [2023-11-24 22:02:36,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 74 transitions, 497 flow [2023-11-24 22:02:36,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 74 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:02:36,086 INFO L231 Difference]: Finished difference. Result has 92 places, 71 transitions, 364 flow [2023-11-24 22:02:36,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=92, PETRI_TRANSITIONS=71} [2023-11-24 22:02:36,087 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 21 predicate places. [2023-11-24 22:02:36,087 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 71 transitions, 364 flow [2023-11-24 22:02:36,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:02:36,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:36,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:36,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:36,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:36,294 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:36,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:36,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1296433924, now seen corresponding path program 1 times [2023-11-24 22:02:36,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:36,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637151964] [2023-11-24 22:02:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:36,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:36,322 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:36,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434913723] [2023-11-24 22:02:36,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:36,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:36,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:36,324 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:36,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 22:02:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:36,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-24 22:02:36,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:36,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:36,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:02:36,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-24 22:02:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:37,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:39,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:39,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637151964] [2023-11-24 22:02:39,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:39,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434913723] [2023-11-24 22:02:39,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434913723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:39,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:02:39,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 22:02:39,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119605644] [2023-11-24 22:02:39,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:39,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 22:02:39,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:39,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 22:02:39,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-24 22:02:39,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2023-11-24 22:02:39,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 71 transitions, 364 flow. Second operand has 10 states, 10 states have (on average 39.8) internal successors, (398), 10 states have internal predecessors, (398), 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) [2023-11-24 22:02:39,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:39,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2023-11-24 22:02:39,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:41,647 INFO L124 PetriNetUnfolderBase]: 3937/8523 cut-off events. [2023-11-24 22:02:41,647 INFO L125 PetriNetUnfolderBase]: For 11444/11444 co-relation queries the response was YES. [2023-11-24 22:02:41,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24545 conditions, 8523 events. 3937/8523 cut-off events. For 11444/11444 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 49600 event pairs, 1144 based on Foata normal form. 50/8362 useless extension candidates. Maximal degree in co-relation 24514. Up to 2105 conditions per place. [2023-11-24 22:02:41,726 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 175 selfloop transitions, 9 changer transitions 4/206 dead transitions. [2023-11-24 22:02:41,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 206 transitions, 1423 flow [2023-11-24 22:02:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 22:02:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 22:02:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 455 transitions. [2023-11-24 22:02:41,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639943741209564 [2023-11-24 22:02:41,729 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 455 transitions. [2023-11-24 22:02:41,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 455 transitions. [2023-11-24 22:02:41,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:41,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 455 transitions. [2023-11-24 22:02:41,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 50.55555555555556) internal successors, (455), 9 states have internal predecessors, (455), 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) [2023-11-24 22:02:41,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 79.0) internal successors, (790), 10 states have internal predecessors, (790), 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) [2023-11-24 22:02:41,735 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 79.0) internal successors, (790), 10 states have internal predecessors, (790), 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) [2023-11-24 22:02:41,735 INFO L175 Difference]: Start difference. First operand has 92 places, 71 transitions, 364 flow. Second operand 9 states and 455 transitions. [2023-11-24 22:02:41,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 206 transitions, 1423 flow [2023-11-24 22:02:41,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 206 transitions, 1422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:41,770 INFO L231 Difference]: Finished difference. Result has 101 places, 75 transitions, 427 flow [2023-11-24 22:02:41,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=427, PETRI_PLACES=101, PETRI_TRANSITIONS=75} [2023-11-24 22:02:41,771 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 30 predicate places. [2023-11-24 22:02:41,771 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 75 transitions, 427 flow [2023-11-24 22:02:41,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 39.8) internal successors, (398), 10 states have internal predecessors, (398), 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) [2023-11-24 22:02:41,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:41,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:41,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-24 22:02:41,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:41,979 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:41,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:41,982 INFO L85 PathProgramCache]: Analyzing trace with hash 279873163, now seen corresponding path program 1 times [2023-11-24 22:02:41,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:41,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987627259] [2023-11-24 22:02:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:41,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:42,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:42,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44918186] [2023-11-24 22:02:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:42,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:42,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:42,037 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:42,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 22:02:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:42,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 22:02:42,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:42,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:02:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:44,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:44,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987627259] [2023-11-24 22:02:44,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:02:44,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44918186] [2023-11-24 22:02:44,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44918186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:02:44,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:02:44,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-24 22:02:44,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767789804] [2023-11-24 22:02:44,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:02:44,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 22:02:44,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:44,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 22:02:44,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-24 22:02:44,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2023-11-24 22:02:44,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 75 transitions, 427 flow. Second operand has 11 states, 11 states have (on average 39.90909090909091) internal successors, (439), 11 states have internal predecessors, (439), 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) [2023-11-24 22:02:44,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:44,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2023-11-24 22:02:44,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:50,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-24 22:02:57,503 INFO L124 PetriNetUnfolderBase]: 3317/7056 cut-off events. [2023-11-24 22:02:57,504 INFO L125 PetriNetUnfolderBase]: For 9630/9630 co-relation queries the response was YES. [2023-11-24 22:02:57,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20579 conditions, 7056 events. 3317/7056 cut-off events. For 9630/9630 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 37874 event pairs, 743 based on Foata normal form. 41/6966 useless extension candidates. Maximal degree in co-relation 20542. Up to 1654 conditions per place. [2023-11-24 22:02:57,555 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 178 selfloop transitions, 9 changer transitions 6/210 dead transitions. [2023-11-24 22:02:57,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 210 transitions, 1450 flow [2023-11-24 22:02:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 22:02:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 22:02:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 494 transitions. [2023-11-24 22:02:57,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253164556962025 [2023-11-24 22:02:57,559 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 494 transitions. [2023-11-24 22:02:57,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 494 transitions. [2023-11-24 22:02:57,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:57,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 494 transitions. [2023-11-24 22:02:57,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 49.4) internal successors, (494), 10 states have internal predecessors, (494), 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) [2023-11-24 22:02:57,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 79.0) internal successors, (869), 11 states have internal predecessors, (869), 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) [2023-11-24 22:02:57,565 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 79.0) internal successors, (869), 11 states have internal predecessors, (869), 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) [2023-11-24 22:02:57,565 INFO L175 Difference]: Start difference. First operand has 101 places, 75 transitions, 427 flow. Second operand 10 states and 494 transitions. [2023-11-24 22:02:57,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 210 transitions, 1450 flow [2023-11-24 22:02:57,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 210 transitions, 1430 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-24 22:02:57,597 INFO L231 Difference]: Finished difference. Result has 109 places, 77 transitions, 451 flow [2023-11-24 22:02:57,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=451, PETRI_PLACES=109, PETRI_TRANSITIONS=77} [2023-11-24 22:02:57,598 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 38 predicate places. [2023-11-24 22:02:57,598 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 77 transitions, 451 flow [2023-11-24 22:02:57,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 39.90909090909091) internal successors, (439), 11 states have internal predecessors, (439), 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) [2023-11-24 22:02:57,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:57,599 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:57,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 22:02:57,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:57,806 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-24 22:02:57,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:57,807 INFO L85 PathProgramCache]: Analyzing trace with hash -180982853, now seen corresponding path program 1 times [2023-11-24 22:02:57,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:57,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316506790] [2023-11-24 22:02:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:57,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:57,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:02:57,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5612870] [2023-11-24 22:02:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:57,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:02:57,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:57,836 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:02:57,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dc2f8ce-4a4e-4b9b-bb1d-25b61d08fe21/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process