./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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya --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 [2023-11-29 03:25:46,782 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:25:46,844 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 03:25:46,849 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:25:46,849 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:25:46,873 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:25:46,874 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:25:46,874 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:25:46,875 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:25:46,875 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:25:46,876 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:25:46,876 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:25:46,877 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:25:46,878 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:25:46,878 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:25:46,879 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:25:46,879 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:25:46,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:25:46,880 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:25:46,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:25:46,881 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 03:25:46,882 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 03:25:46,882 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 03:25:46,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:25:46,883 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 03:25:46,883 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 03:25:46,884 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:25:46,884 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:25:46,885 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:25:46,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:25:46,885 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:25:46,886 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:25:46,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:25:46,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:25:46,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:25:46,887 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:25:46,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:25:46,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:25:46,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:25:46,888 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:25:46,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:25:46,888 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_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 [2023-11-29 03:25:47,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:25:47,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:25:47,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:25:47,117 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:25:47,117 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:25:47,118 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2023-11-29 03:25:49,840 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:25:50,053 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:25:50,054 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2023-11-29 03:25:50,069 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/data/e7d8b19df/6a93a60f745b4357bd7b70f792ead277/FLAG0d2f5b231 [2023-11-29 03:25:50,082 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/data/e7d8b19df/6a93a60f745b4357bd7b70f792ead277 [2023-11-29 03:25:50,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:25:50,085 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:25:50,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:25:50,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:25:50,092 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:25:50,093 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb4c5e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50, skipping insertion in model container [2023-11-29 03:25:50,094 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,149 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:25:50,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:25:50,476 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:25:50,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:25:50,562 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:25:50,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50 WrapperNode [2023-11-29 03:25:50,562 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:25:50,563 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:25:50,563 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:25:50,564 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:25:50,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,587 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,615 INFO L138 Inliner]: procedures = 169, calls = 41, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 156 [2023-11-29 03:25:50,615 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:25:50,616 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:25:50,616 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:25:50,616 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:25:50,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,630 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,644 INFO L175 MemorySlicer]: Split 18 memory accesses to 6 slices as follows [2, 2, 1, 3, 8, 2]. 44 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 0, 1, 0, 8, 0]. The 4 writes are split as follows [0, 1, 0, 2, 0, 1]. [2023-11-29 03:25:50,645 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,656 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,659 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,663 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,665 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,671 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:25:50,672 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:25:50,672 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:25:50,672 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:25:50,673 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (1/1) ... [2023-11-29 03:25:50,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:25:50,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:25:50,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:25:50,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:25:50,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 03:25:50,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 03:25:50,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 03:25:50,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 03:25:50,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 03:25:50,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 03:25:50,737 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-29 03:25:50,737 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-29 03:25:50,737 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-29 03:25:50,737 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-29 03:25:50,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 03:25:50,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 03:25:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 03:25:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 03:25:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 03:25:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 03:25:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 03:25:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:25:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:25:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:25:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 03:25:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 03:25:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-29 03:25:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-29 03:25:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-29 03:25:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-29 03:25:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:25:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:25:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 03:25:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 03:25:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 03:25:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 03:25:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 03:25:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:25:50,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:25:50,742 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 03:25:50,912 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:25:50,914 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:25:51,216 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:25:51,349 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:25:51,349 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 03:25:51,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:25:51 BoogieIcfgContainer [2023-11-29 03:25:51,350 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:25:51,352 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:25:51,352 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:25:51,355 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:25:51,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:25:50" (1/3) ... [2023-11-29 03:25:51,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391bb54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:25:51, skipping insertion in model container [2023-11-29 03:25:51,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:25:50" (2/3) ... [2023-11-29 03:25:51,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391bb54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:25:51, skipping insertion in model container [2023-11-29 03:25:51,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:25:51" (3/3) ... [2023-11-29 03:25:51,358 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2023-11-29 03:25:51,376 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:25:51,376 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-29 03:25:51,376 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 03:25:51,434 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 03:25:51,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 79 transitions, 172 flow [2023-11-29 03:25:51,500 INFO L124 PetriNetUnfolderBase]: 12/77 cut-off events. [2023-11-29 03:25:51,500 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 03:25:51,504 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. [2023-11-29 03:25:51,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 79 transitions, 172 flow [2023-11-29 03:25:51,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 76 transitions, 164 flow [2023-11-29 03:25:51,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:25:51,526 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;@2fc44abc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:25:51,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-11-29 03:25:51,530 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:25:51,531 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 03:25:51,531 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:25:51,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:51,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 03:25:51,532 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)] === [2023-11-29 03:25:51,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:51,537 INFO L85 PathProgramCache]: Analyzing trace with hash 14022, now seen corresponding path program 1 times [2023-11-29 03:25:51,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:51,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605635651] [2023-11-29 03:25:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:51,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:51,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:51,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605635651] [2023-11-29 03:25:51,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605635651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:51,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:51,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:25:51,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182453180] [2023-11-29 03:25:51,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:51,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:25:51,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:25:51,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:25:51,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 03:25:51,904 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) [2023-11-29 03:25:51,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:51,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 03:25:51,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:52,245 INFO L124 PetriNetUnfolderBase]: 920/1760 cut-off events. [2023-11-29 03:25:52,245 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-29 03:25:52,252 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. [2023-11-29 03:25:52,266 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 34 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-29 03:25:52,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 65 transitions, 214 flow [2023-11-29 03:25:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:52,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-29 03:25:52,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780590717299579 [2023-11-29 03:25:52,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-29 03:25:52,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-29 03:25:52,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:52,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-29 03:25:52,286 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) [2023-11-29 03:25:52,290 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) [2023-11-29 03:25:52,290 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) [2023-11-29 03:25:52,292 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 164 flow. Second operand 3 states and 137 transitions. [2023-11-29 03:25:52,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 65 transitions, 214 flow [2023-11-29 03:25:52,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 03:25:52,301 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 138 flow [2023-11-29 03:25:52,303 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} [2023-11-29 03:25:52,306 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-11-29 03:25:52,307 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 138 flow [2023-11-29 03:25:52,307 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) [2023-11-29 03:25:52,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:52,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 03:25:52,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:25:52,308 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)] === [2023-11-29 03:25:52,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:52,308 INFO L85 PathProgramCache]: Analyzing trace with hash 14023, now seen corresponding path program 1 times [2023-11-29 03:25:52,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:52,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166534432] [2023-11-29 03:25:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:52,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:52,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:52,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166534432] [2023-11-29 03:25:52,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166534432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:52,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:52,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:25:52,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018468059] [2023-11-29 03:25:52,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:52,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:25:52,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:52,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:25:52,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:25:52,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2023-11-29 03:25:52,443 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) [2023-11-29 03:25:52,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:52,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2023-11-29 03:25:52,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:52,674 INFO L124 PetriNetUnfolderBase]: 570/1175 cut-off events. [2023-11-29 03:25:52,674 INFO L125 PetriNetUnfolderBase]: For 13/14 co-relation queries the response was YES. [2023-11-29 03:25:52,677 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. [2023-11-29 03:25:52,685 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 32 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-29 03:25:52,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 202 flow [2023-11-29 03:25:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-29 03:25:52,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569620253164557 [2023-11-29 03:25:52,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-29 03:25:52,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-29 03:25:52,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:52,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-29 03:25:52,690 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) [2023-11-29 03:25:52,691 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) [2023-11-29 03:25:52,691 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) [2023-11-29 03:25:52,692 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 138 flow. Second operand 3 states and 135 transitions. [2023-11-29 03:25:52,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 202 flow [2023-11-29 03:25:52,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:25:52,695 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 134 flow [2023-11-29 03:25:52,695 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} [2023-11-29 03:25:52,696 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2023-11-29 03:25:52,696 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 134 flow [2023-11-29 03:25:52,696 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) [2023-11-29 03:25:52,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:52,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 03:25:52,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 03:25:52,697 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)] === [2023-11-29 03:25:52,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:52,698 INFO L85 PathProgramCache]: Analyzing trace with hash 418196131, now seen corresponding path program 1 times [2023-11-29 03:25:52,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:52,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250932721] [2023-11-29 03:25:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:52,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:52,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:52,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250932721] [2023-11-29 03:25:52,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250932721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:52,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:52,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:25:52,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329105788] [2023-11-29 03:25:52,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:52,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:25:52,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:52,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:25:52,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:25:52,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 03:25:52,798 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) [2023-11-29 03:25:52,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:52,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 03:25:52,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:52,981 INFO L124 PetriNetUnfolderBase]: 599/1219 cut-off events. [2023-11-29 03:25:52,981 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 03:25:52,983 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. [2023-11-29 03:25:52,990 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 34 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-29 03:25:52,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 202 flow [2023-11-29 03:25:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2023-11-29 03:25:52,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527426160337553 [2023-11-29 03:25:52,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2023-11-29 03:25:52,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2023-11-29 03:25:52,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:52,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2023-11-29 03:25:52,994 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) [2023-11-29 03:25:52,995 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) [2023-11-29 03:25:52,995 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) [2023-11-29 03:25:52,995 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 134 flow. Second operand 3 states and 131 transitions. [2023-11-29 03:25:52,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 202 flow [2023-11-29 03:25:52,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:25:52,998 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 130 flow [2023-11-29 03:25:52,998 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} [2023-11-29 03:25:52,999 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -11 predicate places. [2023-11-29 03:25:52,999 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 130 flow [2023-11-29 03:25:52,999 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) [2023-11-29 03:25:53,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:53,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 03:25:53,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 03:25:53,000 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)] === [2023-11-29 03:25:53,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:53,001 INFO L85 PathProgramCache]: Analyzing trace with hash 418196132, now seen corresponding path program 1 times [2023-11-29 03:25:53,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:53,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407785216] [2023-11-29 03:25:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:53,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:53,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:53,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407785216] [2023-11-29 03:25:53,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407785216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:53,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:53,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:25:53,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407402142] [2023-11-29 03:25:53,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:53,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:25:53,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:25:53,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:25:53,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2023-11-29 03:25:53,098 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) [2023-11-29 03:25:53,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:53,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2023-11-29 03:25:53,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:53,251 INFO L124 PetriNetUnfolderBase]: 570/1163 cut-off events. [2023-11-29 03:25:53,252 INFO L125 PetriNetUnfolderBase]: For 13/14 co-relation queries the response was YES. [2023-11-29 03:25:53,253 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. [2023-11-29 03:25:53,260 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 32 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-29 03:25:53,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 194 flow [2023-11-29 03:25:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-29 03:25:53,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569620253164557 [2023-11-29 03:25:53,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-29 03:25:53,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-29 03:25:53,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:53,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-29 03:25:53,263 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) [2023-11-29 03:25:53,264 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) [2023-11-29 03:25:53,265 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) [2023-11-29 03:25:53,265 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 130 flow. Second operand 3 states and 135 transitions. [2023-11-29 03:25:53,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 194 flow [2023-11-29 03:25:53,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:25:53,267 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 126 flow [2023-11-29 03:25:53,267 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} [2023-11-29 03:25:53,268 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2023-11-29 03:25:53,268 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 126 flow [2023-11-29 03:25:53,268 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) [2023-11-29 03:25:53,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:53,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:25:53,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 03:25:53,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:25:53,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:53,269 INFO L85 PathProgramCache]: Analyzing trace with hash -322109867, now seen corresponding path program 1 times [2023-11-29 03:25:53,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:53,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324726755] [2023-11-29 03:25:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:53,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:53,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:53,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324726755] [2023-11-29 03:25:53,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324726755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:53,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:53,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:25:53,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666305932] [2023-11-29 03:25:53,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:53,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:25:53,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:53,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:25:53,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:25:53,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 03:25:53,444 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) [2023-11-29 03:25:53,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:53,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 03:25:53,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:53,653 INFO L124 PetriNetUnfolderBase]: 920/1670 cut-off events. [2023-11-29 03:25:53,653 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 03:25:53,655 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. [2023-11-29 03:25:53,665 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 34 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-29 03:25:53,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 194 flow [2023-11-29 03:25:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2023-11-29 03:25:53,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527426160337553 [2023-11-29 03:25:53,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2023-11-29 03:25:53,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2023-11-29 03:25:53,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:53,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2023-11-29 03:25:53,668 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) [2023-11-29 03:25:53,669 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) [2023-11-29 03:25:53,669 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) [2023-11-29 03:25:53,669 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 126 flow. Second operand 3 states and 131 transitions. [2023-11-29 03:25:53,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 194 flow [2023-11-29 03:25:53,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:25:53,671 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 122 flow [2023-11-29 03:25:53,672 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} [2023-11-29 03:25:53,672 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -15 predicate places. [2023-11-29 03:25:53,672 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 122 flow [2023-11-29 03:25:53,673 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) [2023-11-29 03:25:53,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:53,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:25:53,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 03:25:53,673 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:25:53,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:53,674 INFO L85 PathProgramCache]: Analyzing trace with hash -322109866, now seen corresponding path program 1 times [2023-11-29 03:25:53,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:53,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864108947] [2023-11-29 03:25:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:53,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:53,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:53,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864108947] [2023-11-29 03:25:53,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864108947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:53,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:53,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:25:53,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766016465] [2023-11-29 03:25:53,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:53,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:25:53,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:53,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:25:53,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:25:53,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 79 [2023-11-29 03:25:53,940 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) [2023-11-29 03:25:53,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:53,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 79 [2023-11-29 03:25:53,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:54,211 INFO L124 PetriNetUnfolderBase]: 1022/2023 cut-off events. [2023-11-29 03:25:54,211 INFO L125 PetriNetUnfolderBase]: For 14/15 co-relation queries the response was YES. [2023-11-29 03:25:54,214 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. [2023-11-29 03:25:54,226 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 61 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-29 03:25:54,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 85 transitions, 309 flow [2023-11-29 03:25:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:54,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2023-11-29 03:25:54,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7046413502109705 [2023-11-29 03:25:54,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2023-11-29 03:25:54,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2023-11-29 03:25:54,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:54,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2023-11-29 03:25:54,229 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) [2023-11-29 03:25:54,230 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) [2023-11-29 03:25:54,230 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) [2023-11-29 03:25:54,230 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 122 flow. Second operand 3 states and 167 transitions. [2023-11-29 03:25:54,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 85 transitions, 309 flow [2023-11-29 03:25:54,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 85 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:25:54,233 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 132 flow [2023-11-29 03:25:54,233 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} [2023-11-29 03:25:54,234 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -14 predicate places. [2023-11-29 03:25:54,234 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 132 flow [2023-11-29 03:25:54,234 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) [2023-11-29 03:25:54,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:54,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:25:54,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 03:25:54,235 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:25:54,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1017587041, now seen corresponding path program 1 times [2023-11-29 03:25:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:54,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563526473] [2023-11-29 03:25:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:54,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:54,253 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:25:54,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197488807] [2023-11-29 03:25:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:54,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:25:54,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:25:54,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:25:54,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:25:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:54,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 03:25:54,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:25:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:54,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:25:54,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:54,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563526473] [2023-11-29 03:25:54,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:25:54,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197488807] [2023-11-29 03:25:54,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197488807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:54,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:54,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:25:54,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430785981] [2023-11-29 03:25:54,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:25:54,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:25:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:25:54,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2023-11-29 03:25:54,599 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) [2023-11-29 03:25:54,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:54,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2023-11-29 03:25:54,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:54,861 INFO L124 PetriNetUnfolderBase]: 1067/2032 cut-off events. [2023-11-29 03:25:54,861 INFO L125 PetriNetUnfolderBase]: For 61/68 co-relation queries the response was YES. [2023-11-29 03:25:54,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3862 conditions, 2032 events. 1067/2032 cut-off events. For 61/68 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 11645 event pairs, 823 based on Foata normal form. 0/1845 useless extension candidates. Maximal degree in co-relation 1670. Up to 1682 conditions per place. [2023-11-29 03:25:54,876 INFO L140 encePairwiseOnDemand]: 77/79 looper letters, 35 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-11-29 03:25:54,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 198 flow [2023-11-29 03:25:54,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-29 03:25:54,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569620253164557 [2023-11-29 03:25:54,878 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-29 03:25:54,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-29 03:25:54,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:54,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-29 03:25:54,879 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) [2023-11-29 03:25:54,879 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) [2023-11-29 03:25:54,880 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) [2023-11-29 03:25:54,880 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 132 flow. Second operand 3 states and 135 transitions. [2023-11-29 03:25:54,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 198 flow [2023-11-29 03:25:54,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:25:54,882 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 126 flow [2023-11-29 03:25:54,882 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2023-11-29 03:25:54,883 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -16 predicate places. [2023-11-29 03:25:54,883 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 126 flow [2023-11-29 03:25:54,883 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) [2023-11-29 03:25:54,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:54,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:25:54,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:25:55,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 03:25:55,084 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:25:55,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:55,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1016631711, now seen corresponding path program 1 times [2023-11-29 03:25:55,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:55,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019535909] [2023-11-29 03:25:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:55,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:55,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:55,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019535909] [2023-11-29 03:25:55,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019535909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:55,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:55,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:25:55,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627607452] [2023-11-29 03:25:55,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:55,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:25:55,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:55,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:25:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:25:55,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-29 03:25:55,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 126 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) [2023-11-29 03:25:55,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:55,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-29 03:25:55,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:55,426 INFO L124 PetriNetUnfolderBase]: 739/1500 cut-off events. [2023-11-29 03:25:55,426 INFO L125 PetriNetUnfolderBase]: For 82/83 co-relation queries the response was YES. [2023-11-29 03:25:55,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2765 conditions, 1500 events. 739/1500 cut-off events. For 82/83 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 8297 event pairs, 204 based on Foata normal form. 23/1432 useless extension candidates. Maximal degree in co-relation 2757. Up to 771 conditions per place. [2023-11-29 03:25:55,433 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 54 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-29 03:25:55,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 77 transitions, 285 flow [2023-11-29 03:25:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-29 03:25:55,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6835443037974683 [2023-11-29 03:25:55,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-29 03:25:55,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-29 03:25:55,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:55,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-29 03:25:55,436 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) [2023-11-29 03:25:55,436 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) [2023-11-29 03:25:55,436 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) [2023-11-29 03:25:55,437 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 126 flow. Second operand 3 states and 162 transitions. [2023-11-29 03:25:55,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 77 transitions, 285 flow [2023-11-29 03:25:55,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 77 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:25:55,452 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 133 flow [2023-11-29 03:25:55,453 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} [2023-11-29 03:25:55,453 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -14 predicate places. [2023-11-29 03:25:55,454 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 133 flow [2023-11-29 03:25:55,454 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) [2023-11-29 03:25:55,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:55,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:25:55,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 03:25:55,455 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:25:55,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:55,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1226252065, now seen corresponding path program 1 times [2023-11-29 03:25:55,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:55,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679169571] [2023-11-29 03:25:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:55,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:55,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:55,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679169571] [2023-11-29 03:25:55,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679169571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:55,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:55,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:25:55,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435526492] [2023-11-29 03:25:55,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:55,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:25:55,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:55,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:25:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:25:55,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-29 03:25:55,520 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) [2023-11-29 03:25:55,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:55,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-29 03:25:55,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:55,730 INFO L124 PetriNetUnfolderBase]: 828/1694 cut-off events. [2023-11-29 03:25:55,730 INFO L125 PetriNetUnfolderBase]: For 116/133 co-relation queries the response was YES. [2023-11-29 03:25:55,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3178 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 9228 event pairs, 358 based on Foata normal form. 28/1622 useless extension candidates. Maximal degree in co-relation 3168. Up to 783 conditions per place. [2023-11-29 03:25:55,738 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 53 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-11-29 03:25:55,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 296 flow [2023-11-29 03:25:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-29 03:25:55,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.679324894514768 [2023-11-29 03:25:55,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-29 03:25:55,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-29 03:25:55,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:55,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-29 03:25:55,741 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) [2023-11-29 03:25:55,741 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) [2023-11-29 03:25:55,742 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) [2023-11-29 03:25:55,742 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 133 flow. Second operand 3 states and 161 transitions. [2023-11-29 03:25:55,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 296 flow [2023-11-29 03:25:55,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:25:55,745 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 144 flow [2023-11-29 03:25:55,745 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} [2023-11-29 03:25:55,745 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2023-11-29 03:25:55,746 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 144 flow [2023-11-29 03:25:55,746 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) [2023-11-29 03:25:55,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:55,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:25:55,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 03:25:55,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:25:55,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1086733020, now seen corresponding path program 1 times [2023-11-29 03:25:55,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:55,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269163439] [2023-11-29 03:25:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:55,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:55,761 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:25:55,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341307199] [2023-11-29 03:25:55,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:55,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:25:55,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:25:55,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:25:55,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:25:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:55,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 03:25:55,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:25:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:55,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:25:55,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:55,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269163439] [2023-11-29 03:25:55,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:25:55,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341307199] [2023-11-29 03:25:55,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341307199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:55,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:55,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:25:55,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555893843] [2023-11-29 03:25:55,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:55,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:25:55,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:55,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:25:55,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:25:55,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 79 [2023-11-29 03:25:55,918 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) [2023-11-29 03:25:55,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:55,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 79 [2023-11-29 03:25:55,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:56,272 INFO L124 PetriNetUnfolderBase]: 1070/2133 cut-off events. [2023-11-29 03:25:56,272 INFO L125 PetriNetUnfolderBase]: For 208/210 co-relation queries the response was YES. [2023-11-29 03:25:56,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4201 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 12280 event pairs, 354 based on Foata normal form. 0/2021 useless extension candidates. Maximal degree in co-relation 4190. Up to 914 conditions per place. [2023-11-29 03:25:56,284 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 100 selfloop transitions, 6 changer transitions 0/126 dead transitions. [2023-11-29 03:25:56,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 126 transitions, 533 flow [2023-11-29 03:25:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:25:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:25:56,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 308 transitions. [2023-11-29 03:25:56,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6497890295358649 [2023-11-29 03:25:56,286 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 308 transitions. [2023-11-29 03:25:56,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 308 transitions. [2023-11-29 03:25:56,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:56,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 308 transitions. [2023-11-29 03:25:56,287 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) [2023-11-29 03:25:56,288 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) [2023-11-29 03:25:56,289 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) [2023-11-29 03:25:56,289 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 144 flow. Second operand 6 states and 308 transitions. [2023-11-29 03:25:56,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 126 transitions, 533 flow [2023-11-29 03:25:56,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 126 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:25:56,293 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 169 flow [2023-11-29 03:25:56,293 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} [2023-11-29 03:25:56,294 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-11-29 03:25:56,294 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 169 flow [2023-11-29 03:25:56,294 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) [2023-11-29 03:25:56,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:56,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:25:56,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:25:56,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 03:25:56,496 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)] === [2023-11-29 03:25:56,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:56,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2014516547, now seen corresponding path program 1 times [2023-11-29 03:25:56,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:56,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344313368] [2023-11-29 03:25:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:56,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:56,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:56,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344313368] [2023-11-29 03:25:56,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344313368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:56,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:56,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:25:56,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467583212] [2023-11-29 03:25:56,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:56,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:25:56,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:56,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:25:56,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:25:56,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-29 03:25:56,546 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) [2023-11-29 03:25:56,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:56,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-29 03:25:56,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:56,869 INFO L124 PetriNetUnfolderBase]: 1256/2526 cut-off events. [2023-11-29 03:25:56,869 INFO L125 PetriNetUnfolderBase]: For 449/470 co-relation queries the response was YES. [2023-11-29 03:25:56,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5452 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 15445 event pairs, 605 based on Foata normal form. 22/2381 useless extension candidates. Maximal degree in co-relation 5439. Up to 1670 conditions per place. [2023-11-29 03:25:56,885 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 60 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-11-29 03:25:56,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 84 transitions, 371 flow [2023-11-29 03:25:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2023-11-29 03:25:56,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6877637130801688 [2023-11-29 03:25:56,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2023-11-29 03:25:56,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2023-11-29 03:25:56,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:56,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2023-11-29 03:25:56,887 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) [2023-11-29 03:25:56,888 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) [2023-11-29 03:25:56,888 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) [2023-11-29 03:25:56,888 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 169 flow. Second operand 3 states and 163 transitions. [2023-11-29 03:25:56,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 84 transitions, 371 flow [2023-11-29 03:25:56,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:25:56,892 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 189 flow [2023-11-29 03:25:56,893 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} [2023-11-29 03:25:56,893 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-11-29 03:25:56,893 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 189 flow [2023-11-29 03:25:56,894 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) [2023-11-29 03:25:56,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:56,894 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:25:56,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 03:25:56,894 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:25:56,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash 705959460, now seen corresponding path program 1 times [2023-11-29 03:25:56,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:56,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126143946] [2023-11-29 03:25:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:56,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:56,910 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:25:56,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132310156] [2023-11-29 03:25:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:56,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:25:56,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:25:56,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:25:56,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:25:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:57,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 03:25:57,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:25:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:57,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:25:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:57,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:57,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126143946] [2023-11-29 03:25:57,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:25:57,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132310156] [2023-11-29 03:25:57,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132310156] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:25:57,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:25:57,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-29 03:25:57,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056161747] [2023-11-29 03:25:57,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:57,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:25:57,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:57,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:25:57,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:25:57,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 79 [2023-11-29 03:25:57,150 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) [2023-11-29 03:25:57,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:57,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 79 [2023-11-29 03:25:57,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:57,379 INFO L124 PetriNetUnfolderBase]: 967/1917 cut-off events. [2023-11-29 03:25:57,379 INFO L125 PetriNetUnfolderBase]: For 478/495 co-relation queries the response was YES. [2023-11-29 03:25:57,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4175 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 9788 event pairs, 341 based on Foata normal form. 11/1852 useless extension candidates. Maximal degree in co-relation 4161. Up to 984 conditions per place. [2023-11-29 03:25:57,387 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 55 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-11-29 03:25:57,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 355 flow [2023-11-29 03:25:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-11-29 03:25:57,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6455696202531646 [2023-11-29 03:25:57,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-11-29 03:25:57,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-11-29 03:25:57,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:57,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-11-29 03:25:57,390 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) [2023-11-29 03:25:57,390 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) [2023-11-29 03:25:57,390 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) [2023-11-29 03:25:57,390 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 189 flow. Second operand 3 states and 153 transitions. [2023-11-29 03:25:57,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 355 flow [2023-11-29 03:25:57,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 346 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 03:25:57,394 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 195 flow [2023-11-29 03:25:57,394 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} [2023-11-29 03:25:57,395 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-11-29 03:25:57,395 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 195 flow [2023-11-29 03:25:57,395 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) [2023-11-29 03:25:57,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:57,396 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] [2023-11-29 03:25:57,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:25:57,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 03:25:57,600 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)] === [2023-11-29 03:25:57,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:57,601 INFO L85 PathProgramCache]: Analyzing trace with hash -971307359, now seen corresponding path program 1 times [2023-11-29 03:25:57,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:57,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296011502] [2023-11-29 03:25:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:57,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:57,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:57,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296011502] [2023-11-29 03:25:57,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296011502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:57,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:57,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:25:57,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994063115] [2023-11-29 03:25:57,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:57,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:25:57,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:25:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:25:57,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-29 03:25:57,650 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) [2023-11-29 03:25:57,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:57,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-29 03:25:57,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:58,024 INFO L124 PetriNetUnfolderBase]: 1357/2774 cut-off events. [2023-11-29 03:25:58,024 INFO L125 PetriNetUnfolderBase]: For 905/917 co-relation queries the response was YES. [2023-11-29 03:25:58,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6097 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 16618 event pairs, 689 based on Foata normal form. 50/2711 useless extension candidates. Maximal degree in co-relation 6083. Up to 1510 conditions per place. [2023-11-29 03:25:58,041 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 68 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-11-29 03:25:58,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 452 flow [2023-11-29 03:25:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-11-29 03:25:58,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6919831223628692 [2023-11-29 03:25:58,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-11-29 03:25:58,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-11-29 03:25:58,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:58,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-11-29 03:25:58,044 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) [2023-11-29 03:25:58,045 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) [2023-11-29 03:25:58,046 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) [2023-11-29 03:25:58,046 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 195 flow. Second operand 3 states and 164 transitions. [2023-11-29 03:25:58,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 452 flow [2023-11-29 03:25:58,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 442 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:25:58,052 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 201 flow [2023-11-29 03:25:58,052 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} [2023-11-29 03:25:58,053 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-11-29 03:25:58,053 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 201 flow [2023-11-29 03:25:58,053 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) [2023-11-29 03:25:58,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:58,054 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] [2023-11-29 03:25:58,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 03:25:58,054 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:25:58,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:58,054 INFO L85 PathProgramCache]: Analyzing trace with hash -306064342, now seen corresponding path program 1 times [2023-11-29 03:25:58,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:58,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083022939] [2023-11-29 03:25:58,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:58,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:58,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:25:58,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656294407] [2023-11-29 03:25:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:58,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:25:58,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:25:58,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:25:58,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:25:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:58,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:25:58,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:25:58,251 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 [2023-11-29 03:25:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:58,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:25:58,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083022939] [2023-11-29 03:25:58,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:25:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656294407] [2023-11-29 03:25:58,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656294407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:58,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:58,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:25:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868167711] [2023-11-29 03:25:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:58,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:25:58,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:58,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:25:58,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:25:58,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-29 03:25:58,281 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) [2023-11-29 03:25:58,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:58,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-29 03:25:58,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:58,521 INFO L124 PetriNetUnfolderBase]: 886/2028 cut-off events. [2023-11-29 03:25:58,521 INFO L125 PetriNetUnfolderBase]: For 981/981 co-relation queries the response was YES. [2023-11-29 03:25:58,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4764 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 11340 event pairs, 268 based on Foata normal form. 98/2073 useless extension candidates. Maximal degree in co-relation 4749. Up to 922 conditions per place. [2023-11-29 03:25:58,531 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 50 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-11-29 03:25:58,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 369 flow [2023-11-29 03:25:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:25:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:25:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-11-29 03:25:58,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329113924050633 [2023-11-29 03:25:58,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-11-29 03:25:58,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-11-29 03:25:58,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:58,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-11-29 03:25:58,534 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) [2023-11-29 03:25:58,534 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) [2023-11-29 03:25:58,535 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) [2023-11-29 03:25:58,535 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 201 flow. Second operand 3 states and 150 transitions. [2023-11-29 03:25:58,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 369 flow [2023-11-29 03:25:58,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 76 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:25:58,540 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 207 flow [2023-11-29 03:25:58,540 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} [2023-11-29 03:25:58,540 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2023-11-29 03:25:58,541 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 207 flow [2023-11-29 03:25:58,541 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) [2023-11-29 03:25:58,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:58,541 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] [2023-11-29 03:25:58,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 03:25:58,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 03:25:58,747 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:25:58,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:58,747 INFO L85 PathProgramCache]: Analyzing trace with hash -721581730, now seen corresponding path program 1 times [2023-11-29 03:25:58,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:58,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42710949] [2023-11-29 03:25:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:58,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:58,765 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:25:58,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642029448] [2023-11-29 03:25:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:58,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:25:58,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:25:58,766 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:25:58,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:25:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:58,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 03:25:58,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:25:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:59,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:25:59,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42710949] [2023-11-29 03:25:59,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:25:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642029448] [2023-11-29 03:25:59,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642029448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:59,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:59,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:25:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086636829] [2023-11-29 03:25:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:59,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:25:59,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:25:59,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:25:59,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 79 [2023-11-29 03:25:59,176 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) [2023-11-29 03:25:59,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:59,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 79 [2023-11-29 03:25:59,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:59,639 INFO L124 PetriNetUnfolderBase]: 1715/3722 cut-off events. [2023-11-29 03:25:59,639 INFO L125 PetriNetUnfolderBase]: For 2129/2137 co-relation queries the response was YES. [2023-11-29 03:25:59,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9223 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 21838 event pairs, 528 based on Foata normal form. 2/3566 useless extension candidates. Maximal degree in co-relation 9208. Up to 1083 conditions per place. [2023-11-29 03:25:59,655 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 115 selfloop transitions, 4 changer transitions 0/140 dead transitions. [2023-11-29 03:25:59,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 140 transitions, 737 flow [2023-11-29 03:25:59,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:25:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:25:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 275 transitions. [2023-11-29 03:25:59,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962025316455697 [2023-11-29 03:25:59,657 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 275 transitions. [2023-11-29 03:25:59,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 275 transitions. [2023-11-29 03:25:59,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:59,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 275 transitions. [2023-11-29 03:25:59,658 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) [2023-11-29 03:25:59,659 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) [2023-11-29 03:25:59,660 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) [2023-11-29 03:25:59,660 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 207 flow. Second operand 5 states and 275 transitions. [2023-11-29 03:25:59,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 140 transitions, 737 flow [2023-11-29 03:25:59,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 140 transitions, 721 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:25:59,667 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 221 flow [2023-11-29 03:25:59,668 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} [2023-11-29 03:25:59,668 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-11-29 03:25:59,668 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 221 flow [2023-11-29 03:25:59,669 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) [2023-11-29 03:25:59,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:59,669 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] [2023-11-29 03:25:59,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 03:25:59,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 03:25:59,872 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:25:59,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash 404751061, now seen corresponding path program 1 times [2023-11-29 03:25:59,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:59,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335559507] [2023-11-29 03:25:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:59,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:59,890 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:25:59,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792094685] [2023-11-29 03:25:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:59,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:25:59,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:25:59,892 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:25:59,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:26:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:26:00,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:26:00,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:26:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:00,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:26:00,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:26:00,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335559507] [2023-11-29 03:26:00,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:26:00,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792094685] [2023-11-29 03:26:00,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792094685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:26:00,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:26:00,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:26:00,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518233356] [2023-11-29 03:26:00,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:26:00,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:26:00,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:26:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:26:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:26:00,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-29 03:26:00,430 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) [2023-11-29 03:26:00,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:26:00,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-29 03:26:00,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:26:00,741 INFO L124 PetriNetUnfolderBase]: 1285/2841 cut-off events. [2023-11-29 03:26:00,741 INFO L125 PetriNetUnfolderBase]: For 1499/1505 co-relation queries the response was YES. [2023-11-29 03:26:00,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6900 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 15419 event pairs, 436 based on Foata normal form. 20/2784 useless extension candidates. Maximal degree in co-relation 6882. Up to 1432 conditions per place. [2023-11-29 03:26:00,753 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 74 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2023-11-29 03:26:00,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 503 flow [2023-11-29 03:26:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:26:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:26:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 208 transitions. [2023-11-29 03:26:00,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6582278481012658 [2023-11-29 03:26:00,755 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 208 transitions. [2023-11-29 03:26:00,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 208 transitions. [2023-11-29 03:26:00,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:26:00,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 208 transitions. [2023-11-29 03:26:00,757 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) [2023-11-29 03:26:00,758 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) [2023-11-29 03:26:00,758 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) [2023-11-29 03:26:00,758 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 221 flow. Second operand 4 states and 208 transitions. [2023-11-29 03:26:00,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 503 flow [2023-11-29 03:26:00,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 501 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:26:00,763 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 229 flow [2023-11-29 03:26:00,764 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} [2023-11-29 03:26:00,764 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2023-11-29 03:26:00,764 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 229 flow [2023-11-29 03:26:00,765 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) [2023-11-29 03:26:00,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:26:00,765 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] [2023-11-29 03:26:00,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:26:00,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 03:26:00,966 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)] === [2023-11-29 03:26:00,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:26:00,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1441449825, now seen corresponding path program 1 times [2023-11-29 03:26:00,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:26:00,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045894487] [2023-11-29 03:26:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:00,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:26:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:26:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:01,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:26:01,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045894487] [2023-11-29 03:26:01,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045894487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:26:01,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239230665] [2023-11-29 03:26:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:01,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:26:01,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:26:01,046 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:26:01,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:26:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:26:01,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 03:26:01,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:26:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:01,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:26:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:01,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239230665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:26:01,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:26:01,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 03:26:01,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035669370] [2023-11-29 03:26:01,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:26:01,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:26:01,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:26:01,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:26:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:26:01,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 79 [2023-11-29 03:26:01,258 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) [2023-11-29 03:26:01,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:26:01,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 79 [2023-11-29 03:26:01,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:26:01,915 INFO L124 PetriNetUnfolderBase]: 3175/6515 cut-off events. [2023-11-29 03:26:01,916 INFO L125 PetriNetUnfolderBase]: For 3424/3426 co-relation queries the response was YES. [2023-11-29 03:26:01,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16121 conditions, 6515 events. 3175/6515 cut-off events. For 3424/3426 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 41449 event pairs, 484 based on Foata normal form. 326/6681 useless extension candidates. Maximal degree in co-relation 16101. Up to 1693 conditions per place. [2023-11-29 03:26:01,947 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 141 selfloop transitions, 10 changer transitions 0/172 dead transitions. [2023-11-29 03:26:01,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 172 transitions, 933 flow [2023-11-29 03:26:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:26:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:26:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 336 transitions. [2023-11-29 03:26:01,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7088607594936709 [2023-11-29 03:26:01,949 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 336 transitions. [2023-11-29 03:26:01,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 336 transitions. [2023-11-29 03:26:01,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:26:01,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 336 transitions. [2023-11-29 03:26:01,951 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) [2023-11-29 03:26:01,952 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) [2023-11-29 03:26:01,953 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) [2023-11-29 03:26:01,953 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 229 flow. Second operand 6 states and 336 transitions. [2023-11-29 03:26:01,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 172 transitions, 933 flow [2023-11-29 03:26:01,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 172 transitions, 919 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 03:26:01,963 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 294 flow [2023-11-29 03:26:01,963 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} [2023-11-29 03:26:01,964 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2023-11-29 03:26:01,964 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 294 flow [2023-11-29 03:26:01,964 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) [2023-11-29 03:26:01,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:26:01,964 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] [2023-11-29 03:26:01,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:26:02,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:26:02,165 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:26:02,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:26:02,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1518976425, now seen corresponding path program 1 times [2023-11-29 03:26:02,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:26:02,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979715376] [2023-11-29 03:26:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:02,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:26:02,179 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:26:02,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131678476] [2023-11-29 03:26:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:02,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:26:02,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:26:02,181 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:26:02,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:26:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:26:02,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 03:26:02,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:26:02,529 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 [2023-11-29 03:26:02,609 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 [2023-11-29 03:26:02,708 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 [2023-11-29 03:26:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:02,871 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:26:02,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:26:02,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979715376] [2023-11-29 03:26:02,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:26:02,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131678476] [2023-11-29 03:26:02,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131678476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:26:02,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:26:02,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 03:26:02,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535086390] [2023-11-29 03:26:02,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:26:02,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 03:26:02,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:26:02,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 03:26:02,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:26:02,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 79 [2023-11-29 03:26:02,952 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) [2023-11-29 03:26:02,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:26:02,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 79 [2023-11-29 03:26:02,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:26:04,203 INFO L124 PetriNetUnfolderBase]: 3887/8509 cut-off events. [2023-11-29 03:26:04,203 INFO L125 PetriNetUnfolderBase]: For 10271/10287 co-relation queries the response was YES. [2023-11-29 03:26:04,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23513 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 61262 event pairs, 1481 based on Foata normal form. 0/8258 useless extension candidates. Maximal degree in co-relation 23491. Up to 2222 conditions per place. [2023-11-29 03:26:04,248 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 150 selfloop transitions, 18 changer transitions 0/191 dead transitions. [2023-11-29 03:26:04,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 191 transitions, 1160 flow [2023-11-29 03:26:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:26:04,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 03:26:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 530 transitions. [2023-11-29 03:26:04,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098964326812428 [2023-11-29 03:26:04,251 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 530 transitions. [2023-11-29 03:26:04,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 530 transitions. [2023-11-29 03:26:04,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:26:04,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 530 transitions. [2023-11-29 03:26:04,253 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) [2023-11-29 03:26:04,255 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) [2023-11-29 03:26:04,256 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) [2023-11-29 03:26:04,256 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 294 flow. Second operand 11 states and 530 transitions. [2023-11-29 03:26:04,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 191 transitions, 1160 flow [2023-11-29 03:26:04,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 191 transitions, 1121 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-11-29 03:26:04,278 INFO L231 Difference]: Finished difference. Result has 100 places, 83 transitions, 428 flow [2023-11-29 03:26:04,278 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} [2023-11-29 03:26:04,279 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 29 predicate places. [2023-11-29 03:26:04,279 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 83 transitions, 428 flow [2023-11-29 03:26:04,279 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) [2023-11-29 03:26:04,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:26:04,279 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] [2023-11-29 03:26:04,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 03:26:04,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 03:26:04,480 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:26:04,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:26:04,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1861326933, now seen corresponding path program 1 times [2023-11-29 03:26:04,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:26:04,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851916036] [2023-11-29 03:26:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:04,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:26:04,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:26:04,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451642803] [2023-11-29 03:26:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:04,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:26:04,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:26:04,498 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:26:04,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:26:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:26:04,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 03:26:04,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:26:04,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:26:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:26:04,678 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 [2023-11-29 03:26:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:05,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:26:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:06,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:26:06,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851916036] [2023-11-29 03:26:06,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:26:06,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451642803] [2023-11-29 03:26:06,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451642803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:26:06,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:26:06,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-29 03:26:06,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567135697] [2023-11-29 03:26:06,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:26:06,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 03:26:06,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:26:06,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 03:26:06,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:26:06,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 79 [2023-11-29 03:26:06,329 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) [2023-11-29 03:26:06,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:26:06,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 79 [2023-11-29 03:26:06,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:26:07,059 INFO L124 PetriNetUnfolderBase]: 2916/6351 cut-off events. [2023-11-29 03:26:07,059 INFO L125 PetriNetUnfolderBase]: For 7819/7843 co-relation queries the response was YES. [2023-11-29 03:26:07,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18262 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 40230 event pairs, 1705 based on Foata normal form. 132/6344 useless extension candidates. Maximal degree in co-relation 18230. Up to 3347 conditions per place. [2023-11-29 03:26:07,086 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 76 selfloop transitions, 6 changer transitions 0/100 dead transitions. [2023-11-29 03:26:07,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 100 transitions, 697 flow [2023-11-29 03:26:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:26:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:26:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 184 transitions. [2023-11-29 03:26:07,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822784810126582 [2023-11-29 03:26:07,087 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 184 transitions. [2023-11-29 03:26:07,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 184 transitions. [2023-11-29 03:26:07,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:26:07,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 184 transitions. [2023-11-29 03:26:07,088 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) [2023-11-29 03:26:07,089 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) [2023-11-29 03:26:07,089 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) [2023-11-29 03:26:07,089 INFO L175 Difference]: Start difference. First operand has 100 places, 83 transitions, 428 flow. Second operand 4 states and 184 transitions. [2023-11-29 03:26:07,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 100 transitions, 697 flow [2023-11-29 03:26:07,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 666 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-29 03:26:07,103 INFO L231 Difference]: Finished difference. Result has 92 places, 75 transitions, 387 flow [2023-11-29 03:26:07,103 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} [2023-11-29 03:26:07,104 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 21 predicate places. [2023-11-29 03:26:07,104 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 75 transitions, 387 flow [2023-11-29 03:26:07,104 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) [2023-11-29 03:26:07,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:26:07,104 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] [2023-11-29 03:26:07,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:26:07,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:26:07,304 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)] === [2023-11-29 03:26:07,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:26:07,305 INFO L85 PathProgramCache]: Analyzing trace with hash -517689747, now seen corresponding path program 2 times [2023-11-29 03:26:07,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:26:07,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949428475] [2023-11-29 03:26:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:07,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:26:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:26:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 03:26:07,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:26:07,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949428475] [2023-11-29 03:26:07,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949428475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:26:07,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035890695] [2023-11-29 03:26:07,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:26:07,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:26:07,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:26:07,435 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:26:07,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:26:07,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 03:26:07,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:26:07,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:26:07,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:26:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 03:26:08,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:26:08,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035890695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:26:08,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:26:08,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-11-29 03:26:08,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379065768] [2023-11-29 03:26:08,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:26:08,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:26:08,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:26:08,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:26:08,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:26:08,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2023-11-29 03:26:08,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 75 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:26:08,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:26:08,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2023-11-29 03:26:08,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:26:09,995 INFO L124 PetriNetUnfolderBase]: 4542/9376 cut-off events. [2023-11-29 03:26:09,995 INFO L125 PetriNetUnfolderBase]: For 11003/11003 co-relation queries the response was YES. [2023-11-29 03:26:10,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26624 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 62930 event pairs, 3703 based on Foata normal form. 12/9156 useless extension candidates. Maximal degree in co-relation 26592. Up to 7329 conditions per place. [2023-11-29 03:26:10,036 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 52 selfloop transitions, 1 changer transitions 3/74 dead transitions. [2023-11-29 03:26:10,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 74 transitions, 497 flow [2023-11-29 03:26:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:26:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:26:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 165 transitions. [2023-11-29 03:26:10,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221518987341772 [2023-11-29 03:26:10,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 165 transitions. [2023-11-29 03:26:10,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 165 transitions. [2023-11-29 03:26:10,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:26:10,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 165 transitions. [2023-11-29 03:26:10,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:26:10,039 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) [2023-11-29 03:26:10,040 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) [2023-11-29 03:26:10,040 INFO L175 Difference]: Start difference. First operand has 92 places, 75 transitions, 387 flow. Second operand 4 states and 165 transitions. [2023-11-29 03:26:10,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 74 transitions, 497 flow [2023-11-29 03:26:10,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 74 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:26:10,059 INFO L231 Difference]: Finished difference. Result has 92 places, 71 transitions, 364 flow [2023-11-29 03:26:10,059 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} [2023-11-29 03:26:10,060 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 21 predicate places. [2023-11-29 03:26:10,060 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 71 transitions, 364 flow [2023-11-29 03:26:10,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:26:10,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:26:10,060 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] [2023-11-29 03:26:10,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 03:26:10,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:26:10,261 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:26:10,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:26:10,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1296433924, now seen corresponding path program 1 times [2023-11-29 03:26:10,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:26:10,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677132447] [2023-11-29 03:26:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:10,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:26:10,281 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:26:10,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302448728] [2023-11-29 03:26:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:10,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:26:10,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:26:10,283 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:26:10,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:26:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:26:10,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 03:26:10,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:26:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:10,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:26:11,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2023-11-29 03:26:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:12,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:26:12,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677132447] [2023-11-29 03:26:12,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:26:12,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302448728] [2023-11-29 03:26:12,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302448728] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:26:12,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:26:12,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-29 03:26:12,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078655099] [2023-11-29 03:26:12,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:26:12,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:26:12,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:26:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:26:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:26:13,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2023-11-29 03:26:13,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 71 transitions, 364 flow. Second operand has 12 states, 12 states have (on average 37.333333333333336) internal successors, (448), 12 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:26:13,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:26:13,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2023-11-29 03:26:13,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:26:14,180 INFO L124 PetriNetUnfolderBase]: 3188/6765 cut-off events. [2023-11-29 03:26:14,180 INFO L125 PetriNetUnfolderBase]: For 8314/8314 co-relation queries the response was YES. [2023-11-29 03:26:14,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19456 conditions, 6765 events. 3188/6765 cut-off events. For 8314/8314 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 40007 event pairs, 1115 based on Foata normal form. 19/6639 useless extension candidates. Maximal degree in co-relation 19424. Up to 1292 conditions per place. [2023-11-29 03:26:14,209 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 144 selfloop transitions, 9 changer transitions 4/173 dead transitions. [2023-11-29 03:26:14,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 173 transitions, 1177 flow [2023-11-29 03:26:14,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 03:26:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 03:26:14,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 376 transitions. [2023-11-29 03:26:14,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5949367088607594 [2023-11-29 03:26:14,212 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 376 transitions. [2023-11-29 03:26:14,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 376 transitions. [2023-11-29 03:26:14,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:26:14,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 376 transitions. [2023-11-29 03:26:14,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 47.0) internal successors, (376), 8 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:26:14,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:26:14,216 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:26:14,216 INFO L175 Difference]: Start difference. First operand has 92 places, 71 transitions, 364 flow. Second operand 8 states and 376 transitions. [2023-11-29 03:26:14,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 173 transitions, 1177 flow [2023-11-29 03:26:14,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 173 transitions, 1176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:26:14,230 INFO L231 Difference]: Finished difference. Result has 98 places, 74 transitions, 409 flow [2023-11-29 03:26:14,230 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=409, PETRI_PLACES=98, PETRI_TRANSITIONS=74} [2023-11-29 03:26:14,231 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 27 predicate places. [2023-11-29 03:26:14,231 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 74 transitions, 409 flow [2023-11-29 03:26:14,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.333333333333336) internal successors, (448), 12 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:26:14,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:26:14,231 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] [2023-11-29 03:26:14,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 03:26:14,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:26:14,432 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:26:14,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:26:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1662872767, now seen corresponding path program 1 times [2023-11-29 03:26:14,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:26:14,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899278531] [2023-11-29 03:26:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:14,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:26:14,453 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:26:14,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485569452] [2023-11-29 03:26:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:14,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:26:14,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:26:14,455 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:26:14,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:26:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:26:14,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 03:26:14,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:26:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:15,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:26:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:16,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:26:16,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899278531] [2023-11-29 03:26:16,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:26:16,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485569452] [2023-11-29 03:26:16,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485569452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:26:16,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:26:16,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 03:26:16,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791877497] [2023-11-29 03:26:16,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:26:16,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 03:26:16,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:26:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 03:26:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:26:16,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 79 [2023-11-29 03:26:16,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 74 transitions, 409 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) [2023-11-29 03:26:16,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:26:16,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 79 [2023-11-29 03:26:16,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:26:26,460 INFO L124 PetriNetUnfolderBase]: 2824/6023 cut-off events. [2023-11-29 03:26:26,460 INFO L125 PetriNetUnfolderBase]: For 8061/8061 co-relation queries the response was YES. [2023-11-29 03:26:26,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17616 conditions, 6023 events. 2824/6023 cut-off events. For 8061/8061 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 32563 event pairs, 521 based on Foata normal form. 41/5955 useless extension candidates. Maximal degree in co-relation 17580. Up to 994 conditions per place. [2023-11-29 03:26:26,487 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 176 selfloop transitions, 9 changer transitions 6/208 dead transitions. [2023-11-29 03:26:26,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 208 transitions, 1434 flow [2023-11-29 03:26:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 03:26:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 03:26:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 494 transitions. [2023-11-29 03:26:26,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253164556962025 [2023-11-29 03:26:26,490 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 494 transitions. [2023-11-29 03:26:26,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 494 transitions. [2023-11-29 03:26:26,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:26:26,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 494 transitions. [2023-11-29 03:26:26,493 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) [2023-11-29 03:26:26,494 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) [2023-11-29 03:26:26,495 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) [2023-11-29 03:26:26,495 INFO L175 Difference]: Start difference. First operand has 98 places, 74 transitions, 409 flow. Second operand 10 states and 494 transitions. [2023-11-29 03:26:26,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 208 transitions, 1434 flow [2023-11-29 03:26:26,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 208 transitions, 1414 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-29 03:26:26,514 INFO L231 Difference]: Finished difference. Result has 107 places, 77 transitions, 448 flow [2023-11-29 03:26:26,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=448, PETRI_PLACES=107, PETRI_TRANSITIONS=77} [2023-11-29 03:26:26,515 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2023-11-29 03:26:26,515 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 77 transitions, 448 flow [2023-11-29 03:26:26,515 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) [2023-11-29 03:26:26,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:26:26,515 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] [2023-11-29 03:26:26,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 03:26:26,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:26:26,716 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 03:26:26,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:26:26,716 INFO L85 PathProgramCache]: Analyzing trace with hash -405852113, now seen corresponding path program 1 times [2023-11-29 03:26:26,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:26:26,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770265536] [2023-11-29 03:26:26,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:26,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:26:26,732 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:26:26,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914644778] [2023-11-29 03:26:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:26,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:26:26,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:26:26,733 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:26:26,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f51c79c-200a-4964-a736-4cee90bf331d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:26:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:26:26,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 03:26:26,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:26:26,980 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 [2023-11-29 03:26:26,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:26:27,006 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-29 03:26:27,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 03:26:27,011 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 [2023-11-29 03:26:27,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:26:27,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 03:26:27,327 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 54 treesize of output 40 [2023-11-29 03:26:28,244 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 73 treesize of output 54 [2023-11-29 03:26:28,658 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 75 treesize of output 57 [2023-11-29 03:26:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:28,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:27:08,265 WARN L293 SmtUtils]: Spent 13.15s on a formula simplification that was a NOOP. DAG size: 423 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:27:30,193 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 339 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:28:12,359 WARN L293 SmtUtils]: Spent 8.55s on a formula simplification that was a NOOP. DAG size: 342 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:29:23,155 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 191 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:30:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:10,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:10,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770265536] [2023-11-29 03:30:10,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:30:10,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914644778] [2023-11-29 03:30:10,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914644778] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:10,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:30:10,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2023-11-29 03:30:10,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943988110] [2023-11-29 03:30:10,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:10,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 03:30:10,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:10,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 03:30:10,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2023-11-29 03:31:02,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-29 03:31:07,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-29 03:31:07,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 79 [2023-11-29 03:31:07,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 77 transitions, 448 flow. Second operand has 29 states, 29 states have (on average 31.75862068965517) internal successors, (921), 29 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:31:07,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:31:07,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 79 [2023-11-29 03:31:07,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:33,080 WARN L293 SmtUtils]: Spent 1.35m on a formula simplification. DAG size of input: 551 DAG size of output: 333 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:35:12,151 WARN L293 SmtUtils]: Spent 2.63m on a formula simplification. DAG size of input: 639 DAG size of output: 588 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:35:16,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-29 03:35:17,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-29 03:35:38,988 WARN L293 SmtUtils]: Spent 19.04s on a formula simplification that was a NOOP. DAG size: 228 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:38:01,606 WARN L293 SmtUtils]: Spent 2.33m on a formula simplification. DAG size of input: 641 DAG size of output: 590 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:38:03,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-29 03:38:19,603 WARN L293 SmtUtils]: Spent 14.31s on a formula simplification that was a NOOP. DAG size: 230 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)