./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/bigshot_s2.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_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/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_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/bigshot_s2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/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_7967754d-3696-4229-95e1-77f7760653ff/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 fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:08:53,926 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:08:53,992 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 05:08:53,996 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:08:53,997 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:08:54,019 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:08:54,020 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:08:54,020 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:08:54,021 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:08:54,022 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:08:54,022 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:08:54,023 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:08:54,024 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:08:54,024 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:08:54,025 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:08:54,025 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:08:54,026 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:08:54,027 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:08:54,027 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:08:54,027 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:08:54,028 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:08:54,029 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:08:54,029 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:08:54,029 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:08:54,030 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:08:54,030 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:08:54,031 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:08:54,031 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:08:54,031 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:08:54,032 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:08:54,032 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:08:54,032 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:08:54,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:08:54,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:08:54,033 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:08:54,033 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:08:54,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:08:54,034 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:08:54,034 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:08:54,034 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:08:54,034 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:08:54,035 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_7967754d-3696-4229-95e1-77f7760653ff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb [2023-11-29 05:08:54,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:08:54,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:08:54,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:08:54,300 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:08:54,300 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:08:54,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread/bigshot_s2.i [2023-11-29 05:08:57,113 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:08:57,355 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:08:57,355 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/sv-benchmarks/c/pthread/bigshot_s2.i [2023-11-29 05:08:57,375 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/data/81e203545/b65c3235ed414914ac52f7a2517a6302/FLAGd7dffa11e [2023-11-29 05:08:57,391 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/data/81e203545/b65c3235ed414914ac52f7a2517a6302 [2023-11-29 05:08:57,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:08:57,396 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:08:57,397 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:08:57,397 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:08:57,403 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:08:57,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:08:57" (1/1) ... [2023-11-29 05:08:57,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa84b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:57, skipping insertion in model container [2023-11-29 05:08:57,406 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:08:57" (1/1) ... [2023-11-29 05:08:57,461 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:08:57,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:08:57,922 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:08:57,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:08:58,038 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:08:58,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58 WrapperNode [2023-11-29 05:08:58,039 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:08:58,040 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:08:58,040 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:08:58,040 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:08:58,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (1/1) ... [2023-11-29 05:08:58,063 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (1/1) ... [2023-11-29 05:08:58,087 INFO L138 Inliner]: procedures = 323, calls = 34, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2023-11-29 05:08:58,087 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:08:58,088 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:08:58,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:08:58,088 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:08:58,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (1/1) ... [2023-11-29 05:08:58,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (1/1) ... [2023-11-29 05:08:58,105 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (1/1) ... [2023-11-29 05:08:58,122 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 2, 9, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8, 0, 0]. The 3 writes are split as follows [0, 1, 0, 1, 1]. [2023-11-29 05:08:58,122 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (1/1) ... [2023-11-29 05:08:58,123 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (1/1) ... [2023-11-29 05:08:58,130 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (1/1) ... [2023-11-29 05:08:58,132 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (1/1) ... [2023-11-29 05:08:58,134 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (1/1) ... [2023-11-29 05:08:58,136 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (1/1) ... [2023-11-29 05:08:58,139 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:08:58,139 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:08:58,139 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:08:58,140 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:08:58,140 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (1/1) ... [2023-11-29 05:08:58,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:08:58,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:08:58,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:08:58,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:08:58,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:08:58,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:08:58,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2023-11-29 05:08:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2023-11-29 05:08:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2023-11-29 05:08:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2023-11-29 05:08:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2023-11-29 05:08:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:08:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:08:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:08:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:08:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:08:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:08:58,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:08:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:08:58,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:08:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:08:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:08:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:08:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:08:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:08:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:08:58,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:08:58,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:08:58,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:08:58,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:08:58,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:08:58,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:08:58,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:08:58,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:08:58,227 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 05:08:58,404 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:08:58,406 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:08:58,666 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:08:58,785 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:08:58,786 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 05:08:58,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:08:58 BoogieIcfgContainer [2023-11-29 05:08:58,786 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:08:58,789 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:08:58,790 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:08:58,793 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:08:58,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:08:57" (1/3) ... [2023-11-29 05:08:58,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453c5b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:08:58, skipping insertion in model container [2023-11-29 05:08:58,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:08:58" (2/3) ... [2023-11-29 05:08:58,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453c5b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:08:58, skipping insertion in model container [2023-11-29 05:08:58,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:08:58" (3/3) ... [2023-11-29 05:08:58,796 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2023-11-29 05:08:58,811 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:08:58,812 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-29 05:08:58,812 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:08:58,873 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 05:08:58,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 56 transitions, 126 flow [2023-11-29 05:08:58,943 INFO L124 PetriNetUnfolderBase]: 5/54 cut-off events. [2023-11-29 05:08:58,943 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:08:58,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 54 events. 5/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-11-29 05:08:58,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 56 transitions, 126 flow [2023-11-29 05:08:58,950 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 53 transitions, 118 flow [2023-11-29 05:08:58,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:08:58,967 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;@159e992, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:08:58,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-29 05:08:58,971 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:08:58,971 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 05:08:58,971 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:08:58,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:08:58,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 05:08:58,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:08:58,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:08:58,977 INFO L85 PathProgramCache]: Analyzing trace with hash 8038, now seen corresponding path program 1 times [2023-11-29 05:08:58,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:08:58,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550720419] [2023-11-29 05:08:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:08:58,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:08:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:08:59,276 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 05:08:59,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:08:59,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550720419] [2023-11-29 05:08:59,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550720419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:08:59,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:08:59,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:08:59,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727476239] [2023-11-29 05:08:59,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:08:59,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:08:59,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:08:59,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:08:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:08:59,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-29 05:08:59,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 05:08:59,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:08:59,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-29 05:08:59,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:08:59,431 INFO L124 PetriNetUnfolderBase]: 9/70 cut-off events. [2023-11-29 05:08:59,432 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-29 05:08:59,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 70 events. 9/70 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 166 event pairs, 5 based on Foata normal form. 4/54 useless extension candidates. Maximal degree in co-relation 80. Up to 31 conditions per place. [2023-11-29 05:08:59,434 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 17 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-11-29 05:08:59,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 144 flow [2023-11-29 05:08:59,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:08:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:08:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-11-29 05:08:59,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2023-11-29 05:08:59,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-11-29 05:08:59,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-11-29 05:08:59,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:08:59,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-11-29 05:08:59,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:59,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:08:59,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:08:59,460 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 118 flow. Second operand 3 states and 114 transitions. [2023-11-29 05:08:59,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 144 flow [2023-11-29 05:08:59,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:08:59,467 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 102 flow [2023-11-29 05:08:59,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-11-29 05:08:59,473 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2023-11-29 05:08:59,473 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 102 flow [2023-11-29 05:08:59,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 05:08:59,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:08:59,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 05:08:59,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:08:59,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:08:59,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:08:59,475 INFO L85 PathProgramCache]: Analyzing trace with hash 8039, now seen corresponding path program 1 times [2023-11-29 05:08:59,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:08:59,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462357425] [2023-11-29 05:08:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:08:59,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:08:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:08:59,610 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 05:08:59,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:08:59,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462357425] [2023-11-29 05:08:59,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462357425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:08:59,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:08:59,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:08:59,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587975828] [2023-11-29 05:08:59,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:08:59,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:08:59,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:08:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:08:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:08:59,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 56 [2023-11-29 05:08:59,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 05:08:59,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:08:59,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 56 [2023-11-29 05:08:59,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:08:59,711 INFO L124 PetriNetUnfolderBase]: 8/66 cut-off events. [2023-11-29 05:08:59,712 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:08:59,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 66 events. 8/66 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 158 event pairs, 4 based on Foata normal form. 3/49 useless extension candidates. Maximal degree in co-relation 91. Up to 27 conditions per place. [2023-11-29 05:08:59,713 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 15 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-29 05:08:59,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 45 transitions, 132 flow [2023-11-29 05:08:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:08:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:08:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-29 05:08:59,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2023-11-29 05:08:59,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-29 05:08:59,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-29 05:08:59,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:08:59,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-29 05:08:59,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 05:08:59,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:08:59,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:08:59,720 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 102 flow. Second operand 3 states and 115 transitions. [2023-11-29 05:08:59,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 45 transitions, 132 flow [2023-11-29 05:08:59,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:08:59,739 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 98 flow [2023-11-29 05:08:59,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-29 05:08:59,740 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-11-29 05:08:59,741 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 98 flow [2023-11-29 05:08:59,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 05:08:59,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:08:59,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:08:59,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:08:59,742 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:08:59,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:08:59,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1610209842, now seen corresponding path program 1 times [2023-11-29 05:08:59,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:08:59,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321371427] [2023-11-29 05:08:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:08:59,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:08:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:08:59,896 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 05:08:59,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:08:59,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321371427] [2023-11-29 05:08:59,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321371427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:08:59,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:08:59,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:08:59,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097816741] [2023-11-29 05:08:59,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:08:59,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:08:59,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:08:59,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:08:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:08:59,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-29 05:08:59,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 98 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 05:08:59,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:08:59,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-29 05:08:59,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:08:59,980 INFO L124 PetriNetUnfolderBase]: 14/68 cut-off events. [2023-11-29 05:08:59,980 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:08:59,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 68 events. 14/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 8 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 105. Up to 39 conditions per place. [2023-11-29 05:08:59,981 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 17 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-29 05:08:59,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 132 flow [2023-11-29 05:08:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:08:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:08:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-29 05:08:59,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2023-11-29 05:08:59,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-29 05:08:59,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-29 05:08:59,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:08:59,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-29 05:08:59,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 05:08:59,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:08:59,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:08:59,987 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 98 flow. Second operand 3 states and 111 transitions. [2023-11-29 05:08:59,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 132 flow [2023-11-29 05:08:59,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:08:59,989 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 94 flow [2023-11-29 05:08:59,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-11-29 05:08:59,990 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -9 predicate places. [2023-11-29 05:08:59,990 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 94 flow [2023-11-29 05:08:59,991 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 05:08:59,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:08:59,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:08:59,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:08:59,991 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:08:59,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:08:59,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1610209843, now seen corresponding path program 1 times [2023-11-29 05:08:59,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:08:59,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604652161] [2023-11-29 05:08:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:08:59,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:00,174 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 05:09:00,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:00,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604652161] [2023-11-29 05:09:00,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604652161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:00,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:00,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:09:00,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838056438] [2023-11-29 05:09:00,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:00,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:09:00,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:00,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:09:00,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:09:00,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 56 [2023-11-29 05:09:00,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 05:09:00,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:00,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 56 [2023-11-29 05:09:00,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:00,307 INFO L124 PetriNetUnfolderBase]: 14/63 cut-off events. [2023-11-29 05:09:00,307 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:09:00,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 63 events. 14/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 139 event pairs, 8 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 100. Up to 39 conditions per place. [2023-11-29 05:09:00,308 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 17 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-11-29 05:09:00,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 128 flow [2023-11-29 05:09:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:09:00,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:09:00,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2023-11-29 05:09:00,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-29 05:09:00,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 105 transitions. [2023-11-29 05:09:00,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 105 transitions. [2023-11-29 05:09:00,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:00,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 105 transitions. [2023-11-29 05:09:00,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 05:09:00,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:00,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:00,313 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 94 flow. Second operand 3 states and 105 transitions. [2023-11-29 05:09:00,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 128 flow [2023-11-29 05:09:00,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 124 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:09:00,315 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 90 flow [2023-11-29 05:09:00,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-11-29 05:09:00,317 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-11-29 05:09:00,317 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 90 flow [2023-11-29 05:09:00,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 05:09:00,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:00,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:00,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:09:00,318 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:00,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:00,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1095870432, now seen corresponding path program 1 times [2023-11-29 05:09:00,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:00,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767767688] [2023-11-29 05:09:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:00,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:00,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:00,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767767688] [2023-11-29 05:09:00,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767767688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:00,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:00,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:09:00,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427443183] [2023-11-29 05:09:00,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:00,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:09:00,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:00,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:09:00,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:09:00,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 56 [2023-11-29 05:09:00,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 27.714285714285715) internal successors, (194), 7 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:00,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:00,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 56 [2023-11-29 05:09:00,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:00,792 INFO L124 PetriNetUnfolderBase]: 18/83 cut-off events. [2023-11-29 05:09:00,792 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 05:09:00,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 83 events. 18/83 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 236 event pairs, 6 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 131. Up to 32 conditions per place. [2023-11-29 05:09:00,793 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 21 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2023-11-29 05:09:00,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 140 flow [2023-11-29 05:09:00,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:09:00,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:09:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2023-11-29 05:09:00,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5848214285714286 [2023-11-29 05:09:00,796 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 131 transitions. [2023-11-29 05:09:00,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 131 transitions. [2023-11-29 05:09:00,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:00,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 131 transitions. [2023-11-29 05:09:00,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 05:09:00,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 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 05:09:00,799 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 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 05:09:00,799 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 90 flow. Second operand 4 states and 131 transitions. [2023-11-29 05:09:00,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 140 flow [2023-11-29 05:09:00,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:09:00,801 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 90 flow [2023-11-29 05:09:00,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-11-29 05:09:00,802 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -12 predicate places. [2023-11-29 05:09:00,802 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 90 flow [2023-11-29 05:09:00,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.714285714285715) internal successors, (194), 7 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:00,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:00,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:00,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 05:09:00,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:00,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash 387755266, now seen corresponding path program 1 times [2023-11-29 05:09:00,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:00,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326101685] [2023-11-29 05:09:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:00,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:01,347 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 05:09:01,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:01,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326101685] [2023-11-29 05:09:01,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326101685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:01,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:01,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:09:01,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038413487] [2023-11-29 05:09:01,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:01,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:09:01,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:01,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:09:01,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:09:01,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 56 [2023-11-29 05:09:01,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 30.571428571428573) internal successors, (214), 7 states have internal predecessors, (214), 0 states have call successors, (0), 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 05:09:01,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:01,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 56 [2023-11-29 05:09:01,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:01,996 INFO L124 PetriNetUnfolderBase]: 26/104 cut-off events. [2023-11-29 05:09:01,996 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 05:09:01,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 104 events. 26/104 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 302 event pairs, 13 based on Foata normal form. 3/89 useless extension candidates. Maximal degree in co-relation 62. Up to 54 conditions per place. [2023-11-29 05:09:01,997 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 22 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-11-29 05:09:01,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 156 flow [2023-11-29 05:09:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:09:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:09:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2023-11-29 05:09:01,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2023-11-29 05:09:01,999 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 174 transitions. [2023-11-29 05:09:01,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 174 transitions. [2023-11-29 05:09:02,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:02,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 174 transitions. [2023-11-29 05:09:02,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:02,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 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 05:09:02,003 INFO L81 ComplementDD]: Finished complementDD. Result has 6 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 05:09:02,003 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 90 flow. Second operand 5 states and 174 transitions. [2023-11-29 05:09:02,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 156 flow [2023-11-29 05:09:02,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:09:02,005 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 107 flow [2023-11-29 05:09:02,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-11-29 05:09:02,006 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-11-29 05:09:02,006 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 107 flow [2023-11-29 05:09:02,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.571428571428573) internal successors, (214), 7 states have internal predecessors, (214), 0 states have call successors, (0), 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 05:09:02,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:02,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:02,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 05:09:02,007 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:02,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:02,008 INFO L85 PathProgramCache]: Analyzing trace with hash -864488350, now seen corresponding path program 1 times [2023-11-29 05:09:02,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:02,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861595135] [2023-11-29 05:09:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:02,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:02,088 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 05:09:02,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:02,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861595135] [2023-11-29 05:09:02,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861595135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:02,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:02,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:09:02,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408728926] [2023-11-29 05:09:02,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:02,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:09:02,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:02,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:09:02,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:09:02,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:09:02,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 05:09:02,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:02,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:09:02,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:02,220 INFO L124 PetriNetUnfolderBase]: 14/79 cut-off events. [2023-11-29 05:09:02,220 INFO L125 PetriNetUnfolderBase]: For 13/14 co-relation queries the response was YES. [2023-11-29 05:09:02,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 79 events. 14/79 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 173 event pairs, 1 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 51. Up to 20 conditions per place. [2023-11-29 05:09:02,221 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 17 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-11-29 05:09:02,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 151 flow [2023-11-29 05:09:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:09:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:09:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2023-11-29 05:09:02,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6517857142857143 [2023-11-29 05:09:02,227 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 146 transitions. [2023-11-29 05:09:02,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 146 transitions. [2023-11-29 05:09:02,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:02,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 146 transitions. [2023-11-29 05:09:02,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 05:09:02,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 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 05:09:02,230 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 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 05:09:02,230 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 107 flow. Second operand 4 states and 146 transitions. [2023-11-29 05:09:02,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 151 flow [2023-11-29 05:09:02,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:09:02,232 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 107 flow [2023-11-29 05:09:02,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-11-29 05:09:02,233 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-11-29 05:09:02,234 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 107 flow [2023-11-29 05:09:02,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 05:09:02,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:02,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:02,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:09:02,234 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:02,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:02,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1781957272, now seen corresponding path program 1 times [2023-11-29 05:09:02,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:02,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379837224] [2023-11-29 05:09:02,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:02,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:02,372 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 05:09:02,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:02,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379837224] [2023-11-29 05:09:02,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379837224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:02,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:02,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:09:02,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689872430] [2023-11-29 05:09:02,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:02,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:09:02,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:02,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:09:02,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:09:02,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 56 [2023-11-29 05:09:02,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 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 05:09:02,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:02,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 56 [2023-11-29 05:09:02,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:02,518 INFO L124 PetriNetUnfolderBase]: 13/71 cut-off events. [2023-11-29 05:09:02,518 INFO L125 PetriNetUnfolderBase]: For 23/24 co-relation queries the response was YES. [2023-11-29 05:09:02,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 71 events. 13/71 cut-off events. For 23/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 147 event pairs, 4 based on Foata normal form. 3/69 useless extension candidates. Maximal degree in co-relation 52. Up to 30 conditions per place. [2023-11-29 05:09:02,520 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 19 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2023-11-29 05:09:02,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 157 flow [2023-11-29 05:09:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:09:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:09:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2023-11-29 05:09:02,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6830357142857143 [2023-11-29 05:09:02,523 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 153 transitions. [2023-11-29 05:09:02,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 153 transitions. [2023-11-29 05:09:02,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:02,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 153 transitions. [2023-11-29 05:09:02,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.25) internal successors, (153), 4 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 05:09:02,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 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 05:09:02,526 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 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 05:09:02,526 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 107 flow. Second operand 4 states and 153 transitions. [2023-11-29 05:09:02,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 157 flow [2023-11-29 05:09:02,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 147 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:09:02,529 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 108 flow [2023-11-29 05:09:02,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-11-29 05:09:02,530 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-11-29 05:09:02,530 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 108 flow [2023-11-29 05:09:02,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 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 05:09:02,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:02,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:02,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 05:09:02,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:02,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:02,532 INFO L85 PathProgramCache]: Analyzing trace with hash -275973813, now seen corresponding path program 1 times [2023-11-29 05:09:02,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:02,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453323847] [2023-11-29 05:09:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:02,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:03,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:03,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453323847] [2023-11-29 05:09:03,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453323847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:03,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301950668] [2023-11-29 05:09:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:03,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:03,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:03,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:03,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:09:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:03,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:09:03,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:03,268 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 05:09:03,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 05:09:03,283 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 05:09:03,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:03,342 INFO L349 Elim1Store]: treesize reduction 42, result has 25.0 percent of original size [2023-11-29 05:09:03,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 23 [2023-11-29 05:09:03,367 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 05:09:03,495 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-29 05:09:03,495 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 05:09:03,502 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 05:09:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:03,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:03,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301950668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:03,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:09:03,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-11-29 05:09:03,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124361643] [2023-11-29 05:09:03,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:03,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:09:03,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:03,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:09:03,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:09:04,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2023-11-29 05:09:04,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 108 flow. Second operand has 18 states, 18 states have (on average 26.72222222222222) internal successors, (481), 18 states have internal predecessors, (481), 0 states have call successors, (0), 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 05:09:04,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:04,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2023-11-29 05:09:04,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:05,170 INFO L124 PetriNetUnfolderBase]: 33/131 cut-off events. [2023-11-29 05:09:05,170 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-29 05:09:05,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 131 events. 33/131 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 230 event pairs, 7 based on Foata normal form. 12/141 useless extension candidates. Maximal degree in co-relation 96. Up to 40 conditions per place. [2023-11-29 05:09:05,172 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 32 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2023-11-29 05:09:05,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 238 flow [2023-11-29 05:09:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:09:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:09:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2023-11-29 05:09:05,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5401785714285714 [2023-11-29 05:09:05,174 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 242 transitions. [2023-11-29 05:09:05,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 242 transitions. [2023-11-29 05:09:05,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:05,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 242 transitions. [2023-11-29 05:09:05,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 30.25) internal successors, (242), 8 states have internal predecessors, (242), 0 states have call successors, (0), 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 05:09:05,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 56.0) internal successors, (504), 9 states have internal predecessors, (504), 0 states have call successors, (0), 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 05:09:05,178 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 56.0) internal successors, (504), 9 states have internal predecessors, (504), 0 states have call successors, (0), 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 05:09:05,178 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 108 flow. Second operand 8 states and 242 transitions. [2023-11-29 05:09:05,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 238 flow [2023-11-29 05:09:05,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 56 transitions, 230 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:09:05,181 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 165 flow [2023-11-29 05:09:05,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=165, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2023-11-29 05:09:05,182 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -4 predicate places. [2023-11-29 05:09:05,182 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 165 flow [2023-11-29 05:09:05,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 26.72222222222222) internal successors, (481), 18 states have internal predecessors, (481), 0 states have call successors, (0), 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 05:09:05,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:05,183 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] [2023-11-29 05:09:05,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:09:05,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:05,384 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:05,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1567860215, now seen corresponding path program 1 times [2023-11-29 05:09:05,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:05,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396309519] [2023-11-29 05:09:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:05,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:05,437 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 05:09:05,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:05,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396309519] [2023-11-29 05:09:05,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396309519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:05,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:05,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:09:05,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315663530] [2023-11-29 05:09:05,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:05,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:09:05,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:05,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:09:05,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:09:05,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 56 [2023-11-29 05:09:05,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 05:09:05,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:05,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 56 [2023-11-29 05:09:05,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:05,491 INFO L124 PetriNetUnfolderBase]: 20/113 cut-off events. [2023-11-29 05:09:05,491 INFO L125 PetriNetUnfolderBase]: For 103/104 co-relation queries the response was YES. [2023-11-29 05:09:05,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 113 events. 20/113 cut-off events. For 103/104 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 212 event pairs, 11 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 177. Up to 50 conditions per place. [2023-11-29 05:09:05,493 INFO L140 encePairwiseOnDemand]: 54/56 looper letters, 23 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-29 05:09:05,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 213 flow [2023-11-29 05:09:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:09:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:09:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2023-11-29 05:09:05,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2023-11-29 05:09:05,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 118 transitions. [2023-11-29 05:09:05,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 118 transitions. [2023-11-29 05:09:05,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:05,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 118 transitions. [2023-11-29 05:09:05,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 05:09:05,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:05,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:05,497 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 165 flow. Second operand 3 states and 118 transitions. [2023-11-29 05:09:05,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 213 flow [2023-11-29 05:09:05,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 42 transitions, 197 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-29 05:09:05,500 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 149 flow [2023-11-29 05:09:05,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-11-29 05:09:05,501 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -4 predicate places. [2023-11-29 05:09:05,501 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 149 flow [2023-11-29 05:09:05,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 05:09:05,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:05,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:05,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 05:09:05,503 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:05,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1330343727, now seen corresponding path program 1 times [2023-11-29 05:09:05,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:05,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116959294] [2023-11-29 05:09:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:05,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:05,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116959294] [2023-11-29 05:09:05,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116959294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:05,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252978177] [2023-11-29 05:09:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:05,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:05,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:05,634 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:05,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:09:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:05,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:09:05,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:05,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:09:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:05,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:05,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252978177] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:05,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:09:05,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 05:09:05,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563921838] [2023-11-29 05:09:05,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:05,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:09:05,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:05,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:09:05,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:09:06,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:09:06,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 149 flow. Second operand has 11 states, 11 states have (on average 33.72727272727273) internal successors, (371), 11 states have internal predecessors, (371), 0 states have call successors, (0), 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 05:09:06,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:06,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:09:06,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:06,448 INFO L124 PetriNetUnfolderBase]: 25/119 cut-off events. [2023-11-29 05:09:06,448 INFO L125 PetriNetUnfolderBase]: For 62/63 co-relation queries the response was YES. [2023-11-29 05:09:06,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 119 events. 25/119 cut-off events. For 62/63 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 193 event pairs, 4 based on Foata normal form. 7/123 useless extension candidates. Maximal degree in co-relation 236. Up to 29 conditions per place. [2023-11-29 05:09:06,450 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 26 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2023-11-29 05:09:06,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 247 flow [2023-11-29 05:09:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:09:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:09:06,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 257 transitions. [2023-11-29 05:09:06,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6556122448979592 [2023-11-29 05:09:06,453 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 257 transitions. [2023-11-29 05:09:06,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 257 transitions. [2023-11-29 05:09:06,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:06,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 257 transitions. [2023-11-29 05:09:06,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 0 states have call successors, (0), 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 05:09:06,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 56.0) internal successors, (448), 8 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 05:09:06,456 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 56.0) internal successors, (448), 8 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 05:09:06,456 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 149 flow. Second operand 7 states and 257 transitions. [2023-11-29 05:09:06,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 247 flow [2023-11-29 05:09:06,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:09:06,460 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 198 flow [2023-11-29 05:09:06,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-11-29 05:09:06,461 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-11-29 05:09:06,461 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 198 flow [2023-11-29 05:09:06,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 33.72727272727273) internal successors, (371), 11 states have internal predecessors, (371), 0 states have call successors, (0), 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 05:09:06,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:06,462 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] [2023-11-29 05:09:06,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:09:06,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 05:09:06,663 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:06,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:06,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1542310268, now seen corresponding path program 1 times [2023-11-29 05:09:06,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:06,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049812912] [2023-11-29 05:09:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:06,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:06,864 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 05:09:06,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:06,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049812912] [2023-11-29 05:09:06,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049812912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:06,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:06,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:09:06,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713114057] [2023-11-29 05:09:06,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:06,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:09:06,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:06,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:09:06,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:09:06,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 56 [2023-11-29 05:09:06,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 36.2) internal successors, (181), 5 states have internal predecessors, (181), 0 states have call successors, (0), 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 05:09:06,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:06,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 56 [2023-11-29 05:09:06,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:06,997 INFO L124 PetriNetUnfolderBase]: 21/116 cut-off events. [2023-11-29 05:09:06,997 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2023-11-29 05:09:06,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 116 events. 21/116 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 188 event pairs, 12 based on Foata normal form. 2/117 useless extension candidates. Maximal degree in co-relation 272. Up to 51 conditions per place. [2023-11-29 05:09:06,999 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 23 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-11-29 05:09:06,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 46 transitions, 254 flow [2023-11-29 05:09:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:09:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:09:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2023-11-29 05:09:07,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6636904761904762 [2023-11-29 05:09:07,001 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 223 transitions. [2023-11-29 05:09:07,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 223 transitions. [2023-11-29 05:09:07,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:07,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 223 transitions. [2023-11-29 05:09:07,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 37.166666666666664) internal successors, (223), 6 states have internal predecessors, (223), 0 states have call successors, (0), 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 05:09:07,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 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 05:09:07,004 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 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 05:09:07,004 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 198 flow. Second operand 6 states and 223 transitions. [2023-11-29 05:09:07,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 46 transitions, 254 flow [2023-11-29 05:09:07,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 46 transitions, 241 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:09:07,008 INFO L231 Difference]: Finished difference. Result has 61 places, 43 transitions, 195 flow [2023-11-29 05:09:07,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=61, PETRI_TRANSITIONS=43} [2023-11-29 05:09:07,009 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-11-29 05:09:07,010 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 43 transitions, 195 flow [2023-11-29 05:09:07,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.2) internal successors, (181), 5 states have internal predecessors, (181), 0 states have call successors, (0), 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 05:09:07,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:07,010 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] [2023-11-29 05:09:07,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 05:09:07,011 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:07,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:07,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1759805017, now seen corresponding path program 1 times [2023-11-29 05:09:07,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:07,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914314709] [2023-11-29 05:09:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:07,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:07,498 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 05:09:07,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:07,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914314709] [2023-11-29 05:09:07,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914314709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:07,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173249418] [2023-11-29 05:09:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:07,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:07,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:07,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:07,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:09:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:07,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:09:07,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:07,775 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 15 treesize of output 7 [2023-11-29 05:09:07,789 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 05:09:07,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:07,882 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 05:09:07,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173249418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:07,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:09:07,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-11-29 05:09:07,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972731385] [2023-11-29 05:09:07,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:07,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:09:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:09:07,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:09:08,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 56 [2023-11-29 05:09:08,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 43 transitions, 195 flow. Second operand has 16 states, 16 states have (on average 32.125) internal successors, (514), 16 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:08,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:08,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 56 [2023-11-29 05:09:08,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:08,541 INFO L124 PetriNetUnfolderBase]: 33/159 cut-off events. [2023-11-29 05:09:08,542 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-11-29 05:09:08,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 159 events. 33/159 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 373 event pairs, 17 based on Foata normal form. 3/161 useless extension candidates. Maximal degree in co-relation 391. Up to 58 conditions per place. [2023-11-29 05:09:08,544 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 28 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2023-11-29 05:09:08,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 51 transitions, 276 flow [2023-11-29 05:09:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:09:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:09:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 266 transitions. [2023-11-29 05:09:08,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2023-11-29 05:09:08,547 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 266 transitions. [2023-11-29 05:09:08,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 266 transitions. [2023-11-29 05:09:08,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:08,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 266 transitions. [2023-11-29 05:09:08,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 33.25) internal successors, (266), 8 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:08,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 56.0) internal successors, (504), 9 states have internal predecessors, (504), 0 states have call successors, (0), 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 05:09:08,550 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 56.0) internal successors, (504), 9 states have internal predecessors, (504), 0 states have call successors, (0), 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 05:09:08,550 INFO L175 Difference]: Start difference. First operand has 61 places, 43 transitions, 195 flow. Second operand 8 states and 266 transitions. [2023-11-29 05:09:08,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 51 transitions, 276 flow [2023-11-29 05:09:08,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 51 transitions, 273 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:09:08,553 INFO L231 Difference]: Finished difference. Result has 68 places, 43 transitions, 209 flow [2023-11-29 05:09:08,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=68, PETRI_TRANSITIONS=43} [2023-11-29 05:09:08,554 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2023-11-29 05:09:08,555 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 43 transitions, 209 flow [2023-11-29 05:09:08,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 32.125) internal successors, (514), 16 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:08,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:08,556 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:08,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:09:08,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:09:08,762 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:08,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash -298307682, now seen corresponding path program 2 times [2023-11-29 05:09:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:08,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609427381] [2023-11-29 05:09:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:08,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:09,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:09,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609427381] [2023-11-29 05:09:09,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609427381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:09,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145880120] [2023-11-29 05:09:09,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:09:09,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:09,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:09,309 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:09,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:09:09,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:09:09,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:09,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 05:09:09,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:09,494 INFO L349 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2023-11-29 05:09:09,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 28 [2023-11-29 05:09:09,504 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 05:09:09,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:09,591 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 05:09:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:09,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:10,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145880120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:10,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:09:10,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-11-29 05:09:10,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782523134] [2023-11-29 05:09:10,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:10,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:09:10,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:10,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:09:10,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:09:11,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 56 [2023-11-29 05:09:11,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 43 transitions, 209 flow. Second operand has 25 states, 25 states have (on average 31.2) internal successors, (780), 25 states have internal predecessors, (780), 0 states have call successors, (0), 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 05:09:11,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:11,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 56 [2023-11-29 05:09:11,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:12,436 INFO L124 PetriNetUnfolderBase]: 54/218 cut-off events. [2023-11-29 05:09:12,436 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2023-11-29 05:09:12,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 218 events. 54/218 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 346 event pairs, 6 based on Foata normal form. 8/225 useless extension candidates. Maximal degree in co-relation 654. Up to 42 conditions per place. [2023-11-29 05:09:12,439 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 47 selfloop transitions, 20 changer transitions 0/82 dead transitions. [2023-11-29 05:09:12,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 82 transitions, 529 flow [2023-11-29 05:09:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:09:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:09:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 435 transitions. [2023-11-29 05:09:12,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975274725274725 [2023-11-29 05:09:12,442 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 435 transitions. [2023-11-29 05:09:12,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 435 transitions. [2023-11-29 05:09:12,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:12,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 435 transitions. [2023-11-29 05:09:12,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 33.46153846153846) internal successors, (435), 13 states have internal predecessors, (435), 0 states have call successors, (0), 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 05:09:12,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 56.0) internal successors, (784), 14 states have internal predecessors, (784), 0 states have call successors, (0), 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 05:09:12,447 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 56.0) internal successors, (784), 14 states have internal predecessors, (784), 0 states have call successors, (0), 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 05:09:12,447 INFO L175 Difference]: Start difference. First operand has 68 places, 43 transitions, 209 flow. Second operand 13 states and 435 transitions. [2023-11-29 05:09:12,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 82 transitions, 529 flow [2023-11-29 05:09:12,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 82 transitions, 516 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-29 05:09:12,452 INFO L231 Difference]: Finished difference. Result has 80 places, 54 transitions, 366 flow [2023-11-29 05:09:12,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=366, PETRI_PLACES=80, PETRI_TRANSITIONS=54} [2023-11-29 05:09:12,453 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2023-11-29 05:09:12,453 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 54 transitions, 366 flow [2023-11-29 05:09:12,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 31.2) internal successors, (780), 25 states have internal predecessors, (780), 0 states have call successors, (0), 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 05:09:12,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:12,454 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 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 05:09:12,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:09:12,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:09:12,663 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:12,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:12,663 INFO L85 PathProgramCache]: Analyzing trace with hash -466588818, now seen corresponding path program 2 times [2023-11-29 05:09:12,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:12,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797145870] [2023-11-29 05:09:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:12,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:12,955 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 05:09:12,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:12,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797145870] [2023-11-29 05:09:12,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797145870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:12,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632425459] [2023-11-29 05:09:12,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:09:12,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:12,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:12,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:12,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:09:13,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:09:13,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:13,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:09:13,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:13,290 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 15 treesize of output 7 [2023-11-29 05:09:13,301 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 05:09:13,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:13,403 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 05:09:13,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632425459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:13,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:09:13,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-29 05:09:13,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277107547] [2023-11-29 05:09:13,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:13,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:09:13,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:13,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:09:13,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:09:13,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 56 [2023-11-29 05:09:13,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 54 transitions, 366 flow. Second operand has 17 states, 17 states have (on average 35.8235294117647) internal successors, (609), 17 states have internal predecessors, (609), 0 states have call successors, (0), 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 05:09:13,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:13,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 56 [2023-11-29 05:09:13,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:13,879 INFO L124 PetriNetUnfolderBase]: 39/200 cut-off events. [2023-11-29 05:09:13,879 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2023-11-29 05:09:13,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 200 events. 39/200 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 322 event pairs, 20 based on Foata normal form. 2/201 useless extension candidates. Maximal degree in co-relation 645. Up to 83 conditions per place. [2023-11-29 05:09:13,881 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 33 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2023-11-29 05:09:13,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 59 transitions, 450 flow [2023-11-29 05:09:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:09:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:09:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 295 transitions. [2023-11-29 05:09:13,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6584821428571429 [2023-11-29 05:09:13,883 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 295 transitions. [2023-11-29 05:09:13,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 295 transitions. [2023-11-29 05:09:13,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:13,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 295 transitions. [2023-11-29 05:09:13,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 36.875) internal successors, (295), 8 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:13,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 56.0) internal successors, (504), 9 states have internal predecessors, (504), 0 states have call successors, (0), 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 05:09:13,886 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 56.0) internal successors, (504), 9 states have internal predecessors, (504), 0 states have call successors, (0), 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 05:09:13,886 INFO L175 Difference]: Start difference. First operand has 80 places, 54 transitions, 366 flow. Second operand 8 states and 295 transitions. [2023-11-29 05:09:13,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 59 transitions, 450 flow [2023-11-29 05:09:13,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 59 transitions, 443 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:09:13,892 INFO L231 Difference]: Finished difference. Result has 85 places, 54 transitions, 375 flow [2023-11-29 05:09:13,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=375, PETRI_PLACES=85, PETRI_TRANSITIONS=54} [2023-11-29 05:09:13,892 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2023-11-29 05:09:13,893 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 54 transitions, 375 flow [2023-11-29 05:09:13,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 35.8235294117647) internal successors, (609), 17 states have internal predecessors, (609), 0 states have call successors, (0), 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 05:09:13,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:13,893 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:13,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 05:09:14,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:09:14,094 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:14,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1089135776, now seen corresponding path program 2 times [2023-11-29 05:09:14,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:14,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822842605] [2023-11-29 05:09:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:14,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:14,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:14,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822842605] [2023-11-29 05:09:14,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822842605] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:14,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819791514] [2023-11-29 05:09:14,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:09:14,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:14,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:14,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:14,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:09:14,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:09:14,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:14,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 05:09:14,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:14,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:14,494 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 05:09:14,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:14,528 INFO L349 Elim1Store]: treesize reduction 42, result has 25.0 percent of original size [2023-11-29 05:09:14,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 23 [2023-11-29 05:09:14,556 INFO L349 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2023-11-29 05:09:14,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 05:09:14,590 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:09:14,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 05:09:14,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 05:09:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 05:09:15,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 05:09:15,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819791514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:15,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:09:15,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2023-11-29 05:09:15,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747088934] [2023-11-29 05:09:15,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:15,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:09:15,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:09:15,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:09:16,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 56 [2023-11-29 05:09:16,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 54 transitions, 375 flow. Second operand has 16 states, 16 states have (on average 32.8125) internal successors, (525), 16 states have internal predecessors, (525), 0 states have call successors, (0), 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 05:09:16,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:16,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 56 [2023-11-29 05:09:16,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:17,112 INFO L124 PetriNetUnfolderBase]: 60/210 cut-off events. [2023-11-29 05:09:17,112 INFO L125 PetriNetUnfolderBase]: For 697/698 co-relation queries the response was YES. [2023-11-29 05:09:17,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 210 events. 60/210 cut-off events. For 697/698 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 294 event pairs, 2 based on Foata normal form. 11/220 useless extension candidates. Maximal degree in co-relation 709. Up to 48 conditions per place. [2023-11-29 05:09:17,115 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 43 selfloop transitions, 27 changer transitions 0/83 dead transitions. [2023-11-29 05:09:17,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 83 transitions, 597 flow [2023-11-29 05:09:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:09:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 05:09:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 587 transitions. [2023-11-29 05:09:17,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823412698412699 [2023-11-29 05:09:17,117 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 587 transitions. [2023-11-29 05:09:17,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 587 transitions. [2023-11-29 05:09:17,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:17,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 587 transitions. [2023-11-29 05:09:17,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 32.611111111111114) internal successors, (587), 18 states have internal predecessors, (587), 0 states have call successors, (0), 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 05:09:17,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 56.0) internal successors, (1064), 19 states have internal predecessors, (1064), 0 states have call successors, (0), 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 05:09:17,121 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 56.0) internal successors, (1064), 19 states have internal predecessors, (1064), 0 states have call successors, (0), 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 05:09:17,122 INFO L175 Difference]: Start difference. First operand has 85 places, 54 transitions, 375 flow. Second operand 18 states and 587 transitions. [2023-11-29 05:09:17,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 83 transitions, 597 flow [2023-11-29 05:09:17,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 83 transitions, 560 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-11-29 05:09:17,127 INFO L231 Difference]: Finished difference. Result has 91 places, 58 transitions, 409 flow [2023-11-29 05:09:17,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=409, PETRI_PLACES=91, PETRI_TRANSITIONS=58} [2023-11-29 05:09:17,127 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2023-11-29 05:09:17,128 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 58 transitions, 409 flow [2023-11-29 05:09:17,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 32.8125) internal successors, (525), 16 states have internal predecessors, (525), 0 states have call successors, (0), 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 05:09:17,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:17,128 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 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 05:09:17,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:09:17,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:09:17,329 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:17,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:17,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1504628583, now seen corresponding path program 3 times [2023-11-29 05:09:17,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:17,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424148285] [2023-11-29 05:09:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:17,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:17,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:17,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424148285] [2023-11-29 05:09:17,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424148285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:17,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596262362] [2023-11-29 05:09:17,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:09:17,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:17,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:17,569 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:17,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:09:17,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:09:17,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:17,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:09:17,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:18,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:18,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:18,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:18,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:09:18,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 46 [2023-11-29 05:09:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:18,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:18,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596262362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:18,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:09:18,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2023-11-29 05:09:18,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405810765] [2023-11-29 05:09:18,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:18,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:09:18,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:09:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:09:19,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 56 [2023-11-29 05:09:19,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 58 transitions, 409 flow. Second operand has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 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 05:09:19,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:19,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 56 [2023-11-29 05:09:19,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:19,903 INFO L124 PetriNetUnfolderBase]: 36/179 cut-off events. [2023-11-29 05:09:19,903 INFO L125 PetriNetUnfolderBase]: For 612/612 co-relation queries the response was YES. [2023-11-29 05:09:19,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 179 events. 36/179 cut-off events. For 612/612 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 218 event pairs, 9 based on Foata normal form. 8/186 useless extension candidates. Maximal degree in co-relation 560. Up to 42 conditions per place. [2023-11-29 05:09:19,905 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 42 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2023-11-29 05:09:19,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 71 transitions, 531 flow [2023-11-29 05:09:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:09:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:09:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 538 transitions. [2023-11-29 05:09:19,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6404761904761904 [2023-11-29 05:09:19,908 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 538 transitions. [2023-11-29 05:09:19,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 538 transitions. [2023-11-29 05:09:19,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:19,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 538 transitions. [2023-11-29 05:09:19,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 35.86666666666667) internal successors, (538), 15 states have internal predecessors, (538), 0 states have call successors, (0), 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 05:09:19,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 56.0) internal successors, (896), 16 states have internal predecessors, (896), 0 states have call successors, (0), 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 05:09:19,912 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 56.0) internal successors, (896), 16 states have internal predecessors, (896), 0 states have call successors, (0), 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 05:09:19,912 INFO L175 Difference]: Start difference. First operand has 91 places, 58 transitions, 409 flow. Second operand 15 states and 538 transitions. [2023-11-29 05:09:19,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 71 transitions, 531 flow [2023-11-29 05:09:19,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 71 transitions, 469 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-11-29 05:09:19,916 INFO L231 Difference]: Finished difference. Result has 101 places, 56 transitions, 362 flow [2023-11-29 05:09:19,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=362, PETRI_PLACES=101, PETRI_TRANSITIONS=56} [2023-11-29 05:09:19,917 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2023-11-29 05:09:19,917 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 56 transitions, 362 flow [2023-11-29 05:09:19,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 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 05:09:19,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:19,918 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:19,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:09:20,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:09:20,118 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:20,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:20,119 INFO L85 PathProgramCache]: Analyzing trace with hash -119759302, now seen corresponding path program 3 times [2023-11-29 05:09:20,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:20,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809257887] [2023-11-29 05:09:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:20,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 16 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:20,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:20,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809257887] [2023-11-29 05:09:20,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809257887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:20,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657276533] [2023-11-29 05:09:20,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:09:20,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:20,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:20,579 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:20,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:09:20,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:09:20,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:20,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 05:09:20,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:20,745 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 05:09:20,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 05:09:20,753 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 05:09:20,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:20,796 INFO L349 Elim1Store]: treesize reduction 42, result has 25.0 percent of original size [2023-11-29 05:09:20,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 23 [2023-11-29 05:09:20,805 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 05:09:20,931 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-29 05:09:20,931 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 05:09:20,938 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 05:09:21,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:09:21,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 05:09:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-29 05:09:22,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-29 05:09:23,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657276533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:23,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:09:23,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 27 [2023-11-29 05:09:23,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565045751] [2023-11-29 05:09:23,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:23,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:09:23,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:23,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:09:23,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:09:25,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2023-11-29 05:09:25,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 56 transitions, 362 flow. Second operand has 28 states, 28 states have (on average 27.357142857142858) internal successors, (766), 28 states have internal predecessors, (766), 0 states have call successors, (0), 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 05:09:25,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:25,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2023-11-29 05:09:25,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:27,318 INFO L124 PetriNetUnfolderBase]: 45/172 cut-off events. [2023-11-29 05:09:27,318 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2023-11-29 05:09:27,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 172 events. 45/172 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 163 event pairs, 2 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 518. Up to 44 conditions per place. [2023-11-29 05:09:27,319 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 55 selfloop transitions, 21 changer transitions 0/85 dead transitions. [2023-11-29 05:09:27,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 85 transitions, 553 flow [2023-11-29 05:09:27,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:09:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 05:09:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 605 transitions. [2023-11-29 05:09:27,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2023-11-29 05:09:27,322 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 605 transitions. [2023-11-29 05:09:27,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 605 transitions. [2023-11-29 05:09:27,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:27,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 605 transitions. [2023-11-29 05:09:27,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 27.5) internal successors, (605), 22 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:27,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 56.0) internal successors, (1288), 23 states have internal predecessors, (1288), 0 states have call successors, (0), 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 05:09:27,325 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 56.0) internal successors, (1288), 23 states have internal predecessors, (1288), 0 states have call successors, (0), 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 05:09:27,326 INFO L175 Difference]: Start difference. First operand has 101 places, 56 transitions, 362 flow. Second operand 22 states and 605 transitions. [2023-11-29 05:09:27,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 85 transitions, 553 flow [2023-11-29 05:09:27,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 85 transitions, 479 flow, removed 8 selfloop flow, removed 23 redundant places. [2023-11-29 05:09:27,329 INFO L231 Difference]: Finished difference. Result has 97 places, 57 transitions, 301 flow [2023-11-29 05:09:27,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=301, PETRI_PLACES=97, PETRI_TRANSITIONS=57} [2023-11-29 05:09:27,330 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2023-11-29 05:09:27,330 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 57 transitions, 301 flow [2023-11-29 05:09:27,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 27.357142857142858) internal successors, (766), 28 states have internal predecessors, (766), 0 states have call successors, (0), 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 05:09:27,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:27,330 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 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 05:09:27,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:09:27,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:09:27,531 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:27,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:27,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1728948427, now seen corresponding path program 4 times [2023-11-29 05:09:27,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:27,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971945989] [2023-11-29 05:09:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:27,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 05:09:27,559 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 05:09:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 05:09:27,627 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 05:09:27,627 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 05:09:27,628 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (25 of 26 remaining) [2023-11-29 05:09:27,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (24 of 26 remaining) [2023-11-29 05:09:27,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (23 of 26 remaining) [2023-11-29 05:09:27,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (22 of 26 remaining) [2023-11-29 05:09:27,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (21 of 26 remaining) [2023-11-29 05:09:27,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 26 remaining) [2023-11-29 05:09:27,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 26 remaining) [2023-11-29 05:09:27,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 26 remaining) [2023-11-29 05:09:27,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 26 remaining) [2023-11-29 05:09:27,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 26 remaining) [2023-11-29 05:09:27,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 26 remaining) [2023-11-29 05:09:27,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 26 remaining) [2023-11-29 05:09:27,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 26 remaining) [2023-11-29 05:09:27,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 26 remaining) [2023-11-29 05:09:27,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 26 remaining) [2023-11-29 05:09:27,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 26 remaining) [2023-11-29 05:09:27,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 26 remaining) [2023-11-29 05:09:27,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (8 of 26 remaining) [2023-11-29 05:09:27,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 26 remaining) [2023-11-29 05:09:27,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 26 remaining) [2023-11-29 05:09:27,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 26 remaining) [2023-11-29 05:09:27,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 26 remaining) [2023-11-29 05:09:27,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 26 remaining) [2023-11-29 05:09:27,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 26 remaining) [2023-11-29 05:09:27,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 26 remaining) [2023-11-29 05:09:27,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 26 remaining) [2023-11-29 05:09:27,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 05:09:27,634 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:27,641 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 05:09:27,642 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 05:09:27,697 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre5 could not be translated [2023-11-29 05:09:27,699 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem7 could not be translated [2023-11-29 05:09:27,700 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated [2023-11-29 05:09:27,700 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 [2023-11-29 05:09:27,701 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 [2023-11-29 05:09:27,701 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem10 could not be translated [2023-11-29 05:09:27,702 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 [2023-11-29 05:09:27,702 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 [2023-11-29 05:09:27,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 05:09:27 BasicIcfg [2023-11-29 05:09:27,711 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 05:09:27,712 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 05:09:27,712 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 05:09:27,712 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 05:09:27,713 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:08:58" (3/4) ... [2023-11-29 05:09:27,715 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-29 05:09:27,716 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 05:09:27,717 INFO L158 Benchmark]: Toolchain (without parser) took 30321.32ms. Allocated memory was 146.8MB in the beginning and 272.6MB in the end (delta: 125.8MB). Free memory was 107.2MB in the beginning and 93.5MB in the end (delta: 13.7MB). Peak memory consumption was 141.1MB. Max. memory is 16.1GB. [2023-11-29 05:09:27,717 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 146.8MB. Free memory is still 120.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:09:27,718 INFO L158 Benchmark]: CACSL2BoogieTranslator took 642.02ms. Allocated memory is still 146.8MB. Free memory was 106.7MB in the beginning and 74.1MB in the end (delta: 32.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2023-11-29 05:09:27,718 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.79ms. Allocated memory is still 146.8MB. Free memory was 74.1MB in the beginning and 71.5MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 05:09:27,719 INFO L158 Benchmark]: Boogie Preprocessor took 50.79ms. Allocated memory is still 146.8MB. Free memory was 71.5MB in the beginning and 68.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 05:09:27,720 INFO L158 Benchmark]: RCFGBuilder took 647.29ms. Allocated memory was 146.8MB in the beginning and 188.7MB in the end (delta: 41.9MB). Free memory was 68.9MB in the beginning and 143.2MB in the end (delta: -74.2MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. [2023-11-29 05:09:27,720 INFO L158 Benchmark]: TraceAbstraction took 28921.56ms. Allocated memory was 188.7MB in the beginning and 272.6MB in the end (delta: 83.9MB). Free memory was 143.2MB in the beginning and 93.5MB in the end (delta: 49.7MB). Peak memory consumption was 133.6MB. Max. memory is 16.1GB. [2023-11-29 05:09:27,720 INFO L158 Benchmark]: Witness Printer took 4.84ms. Allocated memory is still 272.6MB. Free memory is still 93.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:09:27,723 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 146.8MB. Free memory is still 120.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 642.02ms. Allocated memory is still 146.8MB. Free memory was 106.7MB in the beginning and 74.1MB in the end (delta: 32.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.79ms. Allocated memory is still 146.8MB. Free memory was 74.1MB in the beginning and 71.5MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.79ms. Allocated memory is still 146.8MB. Free memory was 71.5MB in the beginning and 68.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 647.29ms. Allocated memory was 146.8MB in the beginning and 188.7MB in the end (delta: 41.9MB). Free memory was 68.9MB in the beginning and 143.2MB in the end (delta: -74.2MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. * TraceAbstraction took 28921.56ms. Allocated memory was 188.7MB in the beginning and 272.6MB in the end (delta: 83.9MB). Free memory was 143.2MB in the beginning and 93.5MB in the end (delta: 49.7MB). Peak memory consumption was 133.6MB. Max. memory is 16.1GB. * Witness Printer took 4.84ms. Allocated memory is still 272.6MB. Free memory is still 93.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1119]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1119. Possible FailurePath: [L1108] 0 char *v; [L1121] 0 pthread_t t1, t2; [L1122] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, t1={9:0}, t2={10:0}, v={0:0}] [L1123] 0 \read(t1) VAL [arg={0:0}, v={0:0}] [L1111] 1 v = malloc(sizeof(char) * 8) [L1112] 1 return 0; [L1123] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, v={-3:0}] [L1124] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, v={-3:0}] [L1116] COND TRUE 2 \read(*v) [L1116] FCALL 2 strcpy(v, "Bigshot") [L1125] 0 \read(t2) VAL [\result={0:0}, arg={0:0}, arg={0:0}, v={-3:0}] [L1117] 2 return 0; [L1125] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, v={-3:0}] [L1126] EXPR 0 v[0] [L1126] CALL 0 __VERIFIER_assert(v[0] == 'B') [L1107] COND FALSE 0 !(!expression) VAL [\old(expression)=1, \result={0:0}, arg={0:0}, arg={0:0}, expression=1, v={-3:0}] [L1126] RET 0 __VERIFIER_assert(v[0] == 'B') [L1127] 0 return 0; [L1127] 0 return 0; [L1127] 0 return 0; VAL [\result=0, \result={0:0}, arg={0:0}, arg={0:0}, v={-3:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1124]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1122]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 73 locations, 26 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 28.7s, OverallIterations: 19, TraceHistogramMax: 9, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 13.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4323 SdHoareTripleChecker+Valid, 9.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3761 mSDsluCounter, 4769 SdHoareTripleChecker+Invalid, 8.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4708 mSDsCounter, 127 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15324 IncrementalHoareTripleChecker+Invalid, 15451 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 127 mSolverCounterUnsat, 61 mSDtfsCounter, 15324 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 760 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=409occurred in iteration=16, InterpolantAutomatonStates: 137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 11.4s InterpolantComputationTime, 803 NumberOfCodeBlocks, 737 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1001 ConstructedInterpolants, 100 QuantifiedInterpolants, 16039 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1695 ConjunctsInSsa, 179 ConjunctsInUnsatCore, 34 InterpolantComputations, 10 PerfectInterpolantSequences, 398/1038 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-29 05:09:27,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/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_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/bigshot_s2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/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 fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:09:29,708 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:09:29,786 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 05:09:29,791 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:09:29,792 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:09:29,820 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:09:29,820 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:09:29,821 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:09:29,822 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:09:29,822 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:09:29,823 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:09:29,824 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:09:29,825 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:09:29,826 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:09:29,827 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:09:29,827 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:09:29,828 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:09:29,828 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:09:29,829 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:09:29,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:09:29,830 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:09:29,831 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:09:29,831 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:09:29,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:09:29,832 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:09:29,832 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 05:09:29,833 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 05:09:29,833 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:09:29,833 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:09:29,834 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:09:29,835 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:09:29,835 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:09:29,835 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:09:29,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:09:29,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:09:29,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:09:29,836 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:09:29,837 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 05:09:29,837 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 05:09:29,837 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:09:29,837 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:09:29,838 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:09:29,838 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:09:29,838 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 05:09:29,838 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_7967754d-3696-4229-95e1-77f7760653ff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb [2023-11-29 05:09:30,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:09:30,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:09:30,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:09:30,167 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:09:30,167 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:09:30,169 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread/bigshot_s2.i [2023-11-29 05:09:33,123 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:09:33,387 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:09:33,388 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/sv-benchmarks/c/pthread/bigshot_s2.i [2023-11-29 05:09:33,408 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/data/32c52b8e8/7b4bb7b5dd9a4620b5c7d6972ceb32eb/FLAG83e29bd67 [2023-11-29 05:09:33,424 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/data/32c52b8e8/7b4bb7b5dd9a4620b5c7d6972ceb32eb [2023-11-29 05:09:33,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:09:33,429 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:09:33,430 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:09:33,431 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:09:33,436 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:09:33,437 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:09:33" (1/1) ... [2023-11-29 05:09:33,438 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a2a730e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:33, skipping insertion in model container [2023-11-29 05:09:33,438 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:09:33" (1/1) ... [2023-11-29 05:09:33,503 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:09:34,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:09:34,182 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:09:34,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:09:34,335 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:09:34,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34 WrapperNode [2023-11-29 05:09:34,335 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:09:34,337 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:09:34,337 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:09:34,337 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:09:34,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (1/1) ... [2023-11-29 05:09:34,372 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (1/1) ... [2023-11-29 05:09:34,402 INFO L138 Inliner]: procedures = 327, calls = 34, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2023-11-29 05:09:34,402 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:09:34,403 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:09:34,404 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:09:34,404 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:09:34,418 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (1/1) ... [2023-11-29 05:09:34,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (1/1) ... [2023-11-29 05:09:34,423 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (1/1) ... [2023-11-29 05:09:34,444 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 2, 9, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8, 0, 0]. The 3 writes are split as follows [0, 1, 0, 1, 1]. [2023-11-29 05:09:34,444 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (1/1) ... [2023-11-29 05:09:34,445 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (1/1) ... [2023-11-29 05:09:34,457 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (1/1) ... [2023-11-29 05:09:34,462 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (1/1) ... [2023-11-29 05:09:34,465 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (1/1) ... [2023-11-29 05:09:34,468 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (1/1) ... [2023-11-29 05:09:34,473 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:09:34,474 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:09:34,474 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:09:34,475 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:09:34,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (1/1) ... [2023-11-29 05:09:34,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:09:34,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:34,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:09:34,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:09:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2023-11-29 05:09:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2023-11-29 05:09:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2023-11-29 05:09:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#3 [2023-11-29 05:09:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#4 [2023-11-29 05:09:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 05:09:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 05:09:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 05:09:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 05:09:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 05:09:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:09:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:09:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 05:09:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 05:09:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 05:09:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 05:09:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 05:09:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 05:09:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 05:09:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 05:09:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 05:09:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 05:09:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:09:34,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:09:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:09:34,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:09:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2023-11-29 05:09:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2023-11-29 05:09:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#2 [2023-11-29 05:09:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#3 [2023-11-29 05:09:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#4 [2023-11-29 05:09:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:09:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:09:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:09:34,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:09:34,570 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 05:09:34,750 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:09:34,752 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:09:35,046 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:09:35,205 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:09:35,205 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 05:09:35,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:09:35 BoogieIcfgContainer [2023-11-29 05:09:35,206 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:09:35,209 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:09:35,209 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:09:35,212 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:09:35,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:09:33" (1/3) ... [2023-11-29 05:09:35,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d5a956f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:09:35, skipping insertion in model container [2023-11-29 05:09:35,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:34" (2/3) ... [2023-11-29 05:09:35,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d5a956f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:09:35, skipping insertion in model container [2023-11-29 05:09:35,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:09:35" (3/3) ... [2023-11-29 05:09:35,216 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2023-11-29 05:09:35,236 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:09:35,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-29 05:09:35,236 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:09:35,293 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 05:09:35,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 56 transitions, 126 flow [2023-11-29 05:09:35,355 INFO L124 PetriNetUnfolderBase]: 5/54 cut-off events. [2023-11-29 05:09:35,356 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:09:35,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 54 events. 5/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-11-29 05:09:35,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 56 transitions, 126 flow [2023-11-29 05:09:35,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 53 transitions, 118 flow [2023-11-29 05:09:35,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:09:35,383 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;@321adc76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:09:35,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-29 05:09:35,387 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:09:35,387 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 05:09:35,387 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:09:35,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:35,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 05:09:35,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:35,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash 8102, now seen corresponding path program 1 times [2023-11-29 05:09:35,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:35,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847537675] [2023-11-29 05:09:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:35,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:35,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:35,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:35,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 05:09:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:35,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:09:35,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:35,648 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:09:35,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 05:09:35,674 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 05:09:35,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:35,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:35,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847537675] [2023-11-29 05:09:35,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847537675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:35,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:35,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:09:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669335999] [2023-11-29 05:09:35,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:35,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:09:35,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:09:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:09:35,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-29 05:09:35,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 05:09:35,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:35,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-29 05:09:35,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:35,978 INFO L124 PetriNetUnfolderBase]: 9/70 cut-off events. [2023-11-29 05:09:35,978 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-29 05:09:35,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 70 events. 9/70 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 166 event pairs, 5 based on Foata normal form. 4/54 useless extension candidates. Maximal degree in co-relation 80. Up to 31 conditions per place. [2023-11-29 05:09:35,981 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 17 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-11-29 05:09:35,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 144 flow [2023-11-29 05:09:35,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:09:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:09:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-11-29 05:09:35,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2023-11-29 05:09:35,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-11-29 05:09:35,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-11-29 05:09:35,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:35,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-11-29 05:09:36,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:36,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:36,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:36,009 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 118 flow. Second operand 3 states and 114 transitions. [2023-11-29 05:09:36,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 144 flow [2023-11-29 05:09:36,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:09:36,016 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 102 flow [2023-11-29 05:09:36,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-11-29 05:09:36,023 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2023-11-29 05:09:36,024 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 102 flow [2023-11-29 05:09:36,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 05:09:36,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:36,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 05:09:36,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:09:36,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:36,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:36,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:36,227 INFO L85 PathProgramCache]: Analyzing trace with hash 8103, now seen corresponding path program 1 times [2023-11-29 05:09:36,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:36,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339099723] [2023-11-29 05:09:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:36,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:36,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:36,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:36,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 05:09:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:36,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:09:36,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:36,345 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 05:09:36,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-29 05:09:36,373 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 05:09:36,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:36,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:36,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339099723] [2023-11-29 05:09:36,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339099723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:36,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:36,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:09:36,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019220923] [2023-11-29 05:09:36,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:36,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:09:36,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:36,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:09:36,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:09:36,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 56 [2023-11-29 05:09:36,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 05:09:36,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:36,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 56 [2023-11-29 05:09:36,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:36,648 INFO L124 PetriNetUnfolderBase]: 8/66 cut-off events. [2023-11-29 05:09:36,649 INFO L125 PetriNetUnfolderBase]: For 3/4 co-relation queries the response was YES. [2023-11-29 05:09:36,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 66 events. 8/66 cut-off events. For 3/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 3 based on Foata normal form. 3/49 useless extension candidates. Maximal degree in co-relation 92. Up to 27 conditions per place. [2023-11-29 05:09:36,650 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 17 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-11-29 05:09:36,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 140 flow [2023-11-29 05:09:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:09:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:09:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2023-11-29 05:09:36,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2023-11-29 05:09:36,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 117 transitions. [2023-11-29 05:09:36,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 117 transitions. [2023-11-29 05:09:36,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:36,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 117 transitions. [2023-11-29 05:09:36,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 05:09:36,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:36,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:36,659 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 102 flow. Second operand 3 states and 117 transitions. [2023-11-29 05:09:36,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 140 flow [2023-11-29 05:09:36,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:09:36,662 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 104 flow [2023-11-29 05:09:36,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-29 05:09:36,663 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2023-11-29 05:09:36,663 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 104 flow [2023-11-29 05:09:36,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 05:09:36,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:36,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:09:36,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 05:09:36,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:36,867 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:36,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:36,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1100093408, now seen corresponding path program 1 times [2023-11-29 05:09:36,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:36,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092804209] [2023-11-29 05:09:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:36,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:36,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:36,870 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:36,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 05:09:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:36,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:09:36,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:36,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:09:37,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:37,074 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 05:09:37,086 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 05:09:37,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 05:09:37,107 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 05:09:37,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:37,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092804209] [2023-11-29 05:09:37,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092804209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:37,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:37,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:09:37,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78440730] [2023-11-29 05:09:37,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:37,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:09:37,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:09:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:09:37,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 56 [2023-11-29 05:09:37,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 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 05:09:37,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:37,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 56 [2023-11-29 05:09:37,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:37,388 INFO L124 PetriNetUnfolderBase]: 9/67 cut-off events. [2023-11-29 05:09:37,389 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:09:37,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 67 events. 9/67 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 158 event pairs, 5 based on Foata normal form. 1/48 useless extension candidates. Maximal degree in co-relation 84. Up to 31 conditions per place. [2023-11-29 05:09:37,390 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 17 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-29 05:09:37,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 138 flow [2023-11-29 05:09:37,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:09:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:09:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2023-11-29 05:09:37,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-29 05:09:37,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 104 transitions. [2023-11-29 05:09:37,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 104 transitions. [2023-11-29 05:09:37,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:37,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 104 transitions. [2023-11-29 05:09:37,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 05:09:37,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:37,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:37,397 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 104 flow. Second operand 3 states and 104 transitions. [2023-11-29 05:09:37,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 138 flow [2023-11-29 05:09:37,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 132 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:09:37,399 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 98 flow [2023-11-29 05:09:37,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-29 05:09:37,401 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-11-29 05:09:37,401 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 98 flow [2023-11-29 05:09:37,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 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 05:09:37,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:37,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:37,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 05:09:37,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:37,603 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:37,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:37,603 INFO L85 PathProgramCache]: Analyzing trace with hash -979871436, now seen corresponding path program 1 times [2023-11-29 05:09:37,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:37,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873686441] [2023-11-29 05:09:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:37,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:37,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:37,606 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:37,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 05:09:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:37,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:09:37,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:37,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 05:09:37,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:37,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:09:37,748 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:09:37,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 05:09:37,774 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 05:09:37,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:37,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:37,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873686441] [2023-11-29 05:09:37,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873686441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:37,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:37,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:09:37,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704778091] [2023-11-29 05:09:37,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:37,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:09:37,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:09:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:09:37,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-29 05:09:37,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 98 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 05:09:37,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:37,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-29 05:09:37,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:37,908 INFO L124 PetriNetUnfolderBase]: 14/68 cut-off events. [2023-11-29 05:09:37,908 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:09:37,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 68 events. 14/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 8 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 105. Up to 39 conditions per place. [2023-11-29 05:09:37,909 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 17 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-29 05:09:37,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 132 flow [2023-11-29 05:09:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:09:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:09:37,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-29 05:09:37,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2023-11-29 05:09:37,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-29 05:09:37,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-29 05:09:37,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:37,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-29 05:09:37,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 05:09:37,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:37,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:37,916 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 98 flow. Second operand 3 states and 111 transitions. [2023-11-29 05:09:37,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 132 flow [2023-11-29 05:09:37,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:09:37,918 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 94 flow [2023-11-29 05:09:37,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-11-29 05:09:37,919 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -9 predicate places. [2023-11-29 05:09:37,919 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 94 flow [2023-11-29 05:09:37,920 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 05:09:37,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:37,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:37,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 05:09:38,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:38,121 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:38,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:38,121 INFO L85 PathProgramCache]: Analyzing trace with hash -979871435, now seen corresponding path program 1 times [2023-11-29 05:09:38,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:38,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367961947] [2023-11-29 05:09:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:38,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:38,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:38,123 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:38,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 05:09:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:38,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:09:38,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:38,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:09:38,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 05:09:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:38,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:09:38,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:38,307 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 05:09:38,322 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 05:09:38,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 05:09:38,358 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 05:09:38,359 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:38,359 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:38,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367961947] [2023-11-29 05:09:38,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367961947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:38,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:38,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:09:38,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546409216] [2023-11-29 05:09:38,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:38,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:09:38,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:09:38,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:09:38,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 56 [2023-11-29 05:09:38,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 05:09:38,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:38,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 56 [2023-11-29 05:09:38,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:38,545 INFO L124 PetriNetUnfolderBase]: 14/63 cut-off events. [2023-11-29 05:09:38,545 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:09:38,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 63 events. 14/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 139 event pairs, 8 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 100. Up to 39 conditions per place. [2023-11-29 05:09:38,546 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 17 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-11-29 05:09:38,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 128 flow [2023-11-29 05:09:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:09:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:09:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2023-11-29 05:09:38,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-29 05:09:38,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 105 transitions. [2023-11-29 05:09:38,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 105 transitions. [2023-11-29 05:09:38,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:38,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 105 transitions. [2023-11-29 05:09:38,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 05:09:38,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:38,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:09:38,551 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 94 flow. Second operand 3 states and 105 transitions. [2023-11-29 05:09:38,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 128 flow [2023-11-29 05:09:38,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 124 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:09:38,552 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 90 flow [2023-11-29 05:09:38,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-11-29 05:09:38,553 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-11-29 05:09:38,554 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 90 flow [2023-11-29 05:09:38,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 05:09:38,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:38,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:38,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 05:09:38,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:38,757 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:38,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:38,757 INFO L85 PathProgramCache]: Analyzing trace with hash 588412578, now seen corresponding path program 1 times [2023-11-29 05:09:38,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:38,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818636913] [2023-11-29 05:09:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:38,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:38,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:38,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:38,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 05:09:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:38,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:09:38,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:38,876 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 05:09:38,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 05:09:38,913 INFO L349 Elim1Store]: treesize reduction 53, result has 5.4 percent of original size [2023-11-29 05:09:38,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 12 [2023-11-29 05:09:38,962 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-29 05:09:38,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2023-11-29 05:09:39,135 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 05:09:39,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:39,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:39,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818636913] [2023-11-29 05:09:39,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818636913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:39,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:39,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:09:39,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614639737] [2023-11-29 05:09:39,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:39,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:09:39,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:39,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:09:39,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:09:39,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 56 [2023-11-29 05:09:39,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 90 flow. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 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 05:09:39,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:39,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 56 [2023-11-29 05:09:39,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:39,516 INFO L124 PetriNetUnfolderBase]: 19/84 cut-off events. [2023-11-29 05:09:39,516 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 05:09:39,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 84 events. 19/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 236 event pairs, 5 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 135. Up to 30 conditions per place. [2023-11-29 05:09:39,517 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 21 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2023-11-29 05:09:39,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 140 flow [2023-11-29 05:09:39,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:09:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:09:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2023-11-29 05:09:39,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5848214285714286 [2023-11-29 05:09:39,519 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 131 transitions. [2023-11-29 05:09:39,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 131 transitions. [2023-11-29 05:09:39,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:39,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 131 transitions. [2023-11-29 05:09:39,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 05:09:39,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 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 05:09:39,522 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 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 05:09:39,522 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 90 flow. Second operand 4 states and 131 transitions. [2023-11-29 05:09:39,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 140 flow [2023-11-29 05:09:39,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:09:39,524 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 90 flow [2023-11-29 05:09:39,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-11-29 05:09:39,524 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -12 predicate places. [2023-11-29 05:09:39,525 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 90 flow [2023-11-29 05:09:39,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 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 05:09:39,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:39,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:39,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-29 05:09:39,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:39,726 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:39,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:39,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1060921026, now seen corresponding path program 1 times [2023-11-29 05:09:39,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:39,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187042042] [2023-11-29 05:09:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:39,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:39,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:39,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:39,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 05:09:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:39,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:09:39,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:39,867 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-29 05:09:39,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-29 05:09:39,886 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 12 treesize of output 14 [2023-11-29 05:09:39,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:39,930 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-29 05:09:39,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2023-11-29 05:09:39,964 INFO L349 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2023-11-29 05:09:39,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 27 [2023-11-29 05:09:40,290 INFO L349 Elim1Store]: treesize reduction 50, result has 39.0 percent of original size [2023-11-29 05:09:40,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 85 [2023-11-29 05:09:40,421 INFO L349 Elim1Store]: treesize reduction 6, result has 90.2 percent of original size [2023-11-29 05:09:40,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 104 [2023-11-29 05:09:41,662 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 05:09:41,663 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:41,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187042042] [2023-11-29 05:09:41,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187042042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:41,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:41,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:09:41,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179427096] [2023-11-29 05:09:41,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:41,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:09:41,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:41,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:09:41,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:09:42,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 56 [2023-11-29 05:09:42,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 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 05:09:42,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:42,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 56 [2023-11-29 05:09:42,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:42,633 INFO L124 PetriNetUnfolderBase]: 14/81 cut-off events. [2023-11-29 05:09:42,633 INFO L125 PetriNetUnfolderBase]: For 9/10 co-relation queries the response was YES. [2023-11-29 05:09:42,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 81 events. 14/81 cut-off events. For 9/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 191 event pairs, 5 based on Foata normal form. 3/70 useless extension candidates. Maximal degree in co-relation 50. Up to 32 conditions per place. [2023-11-29 05:09:42,634 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 18 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-11-29 05:09:42,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 150 flow [2023-11-29 05:09:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:09:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:09:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 218 transitions. [2023-11-29 05:09:42,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488095238095238 [2023-11-29 05:09:42,637 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 218 transitions. [2023-11-29 05:09:42,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 218 transitions. [2023-11-29 05:09:42,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:42,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 218 transitions. [2023-11-29 05:09:42,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 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 05:09:42,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 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 05:09:42,641 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 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 05:09:42,642 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 90 flow. Second operand 6 states and 218 transitions. [2023-11-29 05:09:42,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 150 flow [2023-11-29 05:09:42,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 140 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:09:42,644 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 109 flow [2023-11-29 05:09:42,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=109, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-11-29 05:09:42,645 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -9 predicate places. [2023-11-29 05:09:42,645 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 109 flow [2023-11-29 05:09:42,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 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 05:09:42,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:42,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:42,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 05:09:42,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:42,846 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:42,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:42,847 INFO L85 PathProgramCache]: Analyzing trace with hash -525633088, now seen corresponding path program 1 times [2023-11-29 05:09:42,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:42,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541845421] [2023-11-29 05:09:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:42,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:42,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:42,848 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:42,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 05:09:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:42,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:09:42,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:42,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 05:09:42,970 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 05:09:42,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:42,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:42,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541845421] [2023-11-29 05:09:42,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541845421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:42,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:42,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:09:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008264025] [2023-11-29 05:09:42,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:42,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:09:42,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:42,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:09:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:09:43,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:09:43,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 05:09:43,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:43,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:09:43,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:43,171 INFO L124 PetriNetUnfolderBase]: 14/79 cut-off events. [2023-11-29 05:09:43,171 INFO L125 PetriNetUnfolderBase]: For 14/15 co-relation queries the response was YES. [2023-11-29 05:09:43,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 79 events. 14/79 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 173 event pairs, 1 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 53. Up to 20 conditions per place. [2023-11-29 05:09:43,172 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 17 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-11-29 05:09:43,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 41 transitions, 153 flow [2023-11-29 05:09:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:09:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:09:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2023-11-29 05:09:43,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6517857142857143 [2023-11-29 05:09:43,174 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 146 transitions. [2023-11-29 05:09:43,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 146 transitions. [2023-11-29 05:09:43,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:43,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 146 transitions. [2023-11-29 05:09:43,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 05:09:43,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 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 05:09:43,176 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 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 05:09:43,176 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 109 flow. Second operand 4 states and 146 transitions. [2023-11-29 05:09:43,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 41 transitions, 153 flow [2023-11-29 05:09:43,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 145 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:09:43,178 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 107 flow [2023-11-29 05:09:43,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-11-29 05:09:43,179 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-11-29 05:09:43,179 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 107 flow [2023-11-29 05:09:43,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 05:09:43,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:43,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:43,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 05:09:43,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:43,383 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:43,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:43,383 INFO L85 PathProgramCache]: Analyzing trace with hash 885243752, now seen corresponding path program 1 times [2023-11-29 05:09:43,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:43,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455587737] [2023-11-29 05:09:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:43,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:43,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:43,385 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:43,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 05:09:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:43,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:09:43,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:43,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:09:43,536 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 05:09:43,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:43,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455587737] [2023-11-29 05:09:43,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455587737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:43,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:43,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:09:43,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949737782] [2023-11-29 05:09:43,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:43,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:09:43,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:43,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:09:43,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:09:43,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 56 [2023-11-29 05:09:43,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 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 05:09:43,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:43,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 56 [2023-11-29 05:09:43,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:43,771 INFO L124 PetriNetUnfolderBase]: 13/71 cut-off events. [2023-11-29 05:09:43,771 INFO L125 PetriNetUnfolderBase]: For 23/24 co-relation queries the response was YES. [2023-11-29 05:09:43,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 71 events. 13/71 cut-off events. For 23/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 4 based on Foata normal form. 3/69 useless extension candidates. Maximal degree in co-relation 52. Up to 30 conditions per place. [2023-11-29 05:09:43,772 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 19 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2023-11-29 05:09:43,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 157 flow [2023-11-29 05:09:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:09:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:09:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2023-11-29 05:09:43,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6830357142857143 [2023-11-29 05:09:43,774 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 153 transitions. [2023-11-29 05:09:43,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 153 transitions. [2023-11-29 05:09:43,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:43,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 153 transitions. [2023-11-29 05:09:43,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.25) internal successors, (153), 4 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 05:09:43,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 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 05:09:43,776 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 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 05:09:43,776 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 107 flow. Second operand 4 states and 153 transitions. [2023-11-29 05:09:43,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 157 flow [2023-11-29 05:09:43,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 147 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:09:43,779 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 108 flow [2023-11-29 05:09:43,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-11-29 05:09:43,780 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-11-29 05:09:43,780 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 108 flow [2023-11-29 05:09:43,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 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 05:09:43,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:43,781 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:43,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 05:09:43,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:43,984 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:09:43,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:43,985 INFO L85 PathProgramCache]: Analyzing trace with hash 597109707, now seen corresponding path program 1 times [2023-11-29 05:09:43,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:43,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492563404] [2023-11-29 05:09:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:43,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:43,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:43,986 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:43,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 05:09:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:44,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:09:44,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:44,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:44,120 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-29 05:09:44,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2023-11-29 05:09:44,147 INFO L349 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2023-11-29 05:09:44,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 27 [2023-11-29 05:09:44,187 INFO L349 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2023-11-29 05:09:44,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 23 [2023-11-29 05:09:44,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:09:44,207 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:09:44,207 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 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-29 05:09:44,471 INFO L349 Elim1Store]: treesize reduction 50, result has 39.0 percent of original size [2023-11-29 05:09:44,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 85 [2023-11-29 05:09:44,591 INFO L349 Elim1Store]: treesize reduction 6, result has 90.2 percent of original size [2023-11-29 05:09:44,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 104 [2023-11-29 05:09:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:46,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:46,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:46,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492563404] [2023-11-29 05:09:46,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492563404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:46,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:09:46,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 05:09:46,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325660138] [2023-11-29 05:09:46,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:46,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:09:46,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:46,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:09:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:09:50,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:09:54,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:09:58,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:02,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:06,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:10,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:14,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:18,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:23,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:27,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:31,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:35,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:39,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:43,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:47,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:10:47,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2023-11-29 05:10:47,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 108 flow. Second operand has 10 states, 10 states have (on average 19.6) internal successors, (196), 10 states have internal predecessors, (196), 0 states have call successors, (0), 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 05:10:47,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:10:47,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2023-11-29 05:10:47,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:10:48,526 INFO L124 PetriNetUnfolderBase]: 66/198 cut-off events. [2023-11-29 05:10:48,526 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-29 05:10:48,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 198 events. 66/198 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 9 based on Foata normal form. 18/213 useless extension candidates. Maximal degree in co-relation 117. Up to 49 conditions per place. [2023-11-29 05:10:48,529 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 43 selfloop transitions, 13 changer transitions 0/65 dead transitions. [2023-11-29 05:10:48,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 280 flow [2023-11-29 05:10:48,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:10:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:10:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2023-11-29 05:10:48,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2023-11-29 05:10:48,531 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 206 transitions. [2023-11-29 05:10:48,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 206 transitions. [2023-11-29 05:10:48,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:10:48,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 206 transitions. [2023-11-29 05:10:48,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 22.88888888888889) internal successors, (206), 9 states have internal predecessors, (206), 0 states have call successors, (0), 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 05:10:48,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 56.0) internal successors, (560), 10 states have internal predecessors, (560), 0 states have call successors, (0), 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 05:10:48,533 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 56.0) internal successors, (560), 10 states have internal predecessors, (560), 0 states have call successors, (0), 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 05:10:48,533 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 108 flow. Second operand 9 states and 206 transitions. [2023-11-29 05:10:48,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 280 flow [2023-11-29 05:10:48,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 272 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:10:48,536 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 167 flow [2023-11-29 05:10:48,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=167, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-11-29 05:10:48,536 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -3 predicate places. [2023-11-29 05:10:48,536 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 167 flow [2023-11-29 05:10:48,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.6) internal successors, (196), 10 states have internal predecessors, (196), 0 states have call successors, (0), 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 05:10:48,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:10:48,537 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] [2023-11-29 05:10:48,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-29 05:10:48,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:10:48,738 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:10:48,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:48,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1844375745, now seen corresponding path program 1 times [2023-11-29 05:10:48,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:10:48,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910377291] [2023-11-29 05:10:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:48,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:10:48,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:10:48,740 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:10:48,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-29 05:10:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:48,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:10:48,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:48,838 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 05:10:48,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:10:48,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:10:48,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910377291] [2023-11-29 05:10:48,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910377291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:10:48,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:10:48,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:10:48,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681717657] [2023-11-29 05:10:48,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:10:48,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:10:48,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:10:48,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:10:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:10:48,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 56 [2023-11-29 05:10:48,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 05:10:48,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:10:48,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 56 [2023-11-29 05:10:48,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:10:48,902 INFO L124 PetriNetUnfolderBase]: 20/113 cut-off events. [2023-11-29 05:10:48,902 INFO L125 PetriNetUnfolderBase]: For 107/108 co-relation queries the response was YES. [2023-11-29 05:10:48,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 113 events. 20/113 cut-off events. For 107/108 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 211 event pairs, 11 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 179. Up to 50 conditions per place. [2023-11-29 05:10:48,903 INFO L140 encePairwiseOnDemand]: 54/56 looper letters, 23 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-29 05:10:48,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 215 flow [2023-11-29 05:10:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:10:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:10:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2023-11-29 05:10:48,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2023-11-29 05:10:48,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 118 transitions. [2023-11-29 05:10:48,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 118 transitions. [2023-11-29 05:10:48,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:10:48,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 118 transitions. [2023-11-29 05:10:48,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 05:10:48,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:10:48,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:10:48,910 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 167 flow. Second operand 3 states and 118 transitions. [2023-11-29 05:10:48,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 215 flow [2023-11-29 05:10:48,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 42 transitions, 197 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-29 05:10:48,913 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 149 flow [2023-11-29 05:10:48,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-11-29 05:10:48,913 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -4 predicate places. [2023-11-29 05:10:48,913 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 149 flow [2023-11-29 05:10:48,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 05:10:48,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:10:48,914 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:48,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-29 05:10:49,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:10:49,114 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:10:49,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:49,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1449983505, now seen corresponding path program 1 times [2023-11-29 05:10:49,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:10:49,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806617306] [2023-11-29 05:10:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:49,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:10:49,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:10:49,116 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:10:49,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-29 05:10:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:49,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:10:49,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:49,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:10:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:49,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:49,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:10:49,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806617306] [2023-11-29 05:10:49,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806617306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:49,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:10:49,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-29 05:10:49,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052786106] [2023-11-29 05:10:49,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:49,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:10:49,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:10:49,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:10:49,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:10:49,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 56 [2023-11-29 05:10:49,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 149 flow. Second operand has 8 states, 8 states have (on average 33.625) internal successors, (269), 8 states have internal predecessors, (269), 0 states have call successors, (0), 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 05:10:49,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:10:49,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 56 [2023-11-29 05:10:49,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:10:50,257 INFO L124 PetriNetUnfolderBase]: 25/119 cut-off events. [2023-11-29 05:10:50,258 INFO L125 PetriNetUnfolderBase]: For 65/66 co-relation queries the response was YES. [2023-11-29 05:10:50,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 119 events. 25/119 cut-off events. For 65/66 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 194 event pairs, 4 based on Foata normal form. 7/123 useless extension candidates. Maximal degree in co-relation 236. Up to 29 conditions per place. [2023-11-29 05:10:50,259 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 26 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2023-11-29 05:10:50,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 247 flow [2023-11-29 05:10:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:10:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:10:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 257 transitions. [2023-11-29 05:10:50,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6556122448979592 [2023-11-29 05:10:50,261 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 257 transitions. [2023-11-29 05:10:50,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 257 transitions. [2023-11-29 05:10:50,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:10:50,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 257 transitions. [2023-11-29 05:10:50,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 0 states have call successors, (0), 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 05:10:50,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 56.0) internal successors, (448), 8 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 05:10:50,264 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 56.0) internal successors, (448), 8 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 05:10:50,264 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 149 flow. Second operand 7 states and 257 transitions. [2023-11-29 05:10:50,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 247 flow [2023-11-29 05:10:50,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:10:50,266 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 198 flow [2023-11-29 05:10:50,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-11-29 05:10:50,267 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-11-29 05:10:50,267 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 198 flow [2023-11-29 05:10:50,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 33.625) internal successors, (269), 8 states have internal predecessors, (269), 0 states have call successors, (0), 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 05:10:50,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:10:50,267 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] [2023-11-29 05:10:50,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-29 05:10:50,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:10:50,468 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:10:50,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:50,468 INFO L85 PathProgramCache]: Analyzing trace with hash -350778876, now seen corresponding path program 1 times [2023-11-29 05:10:50,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:10:50,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162235362] [2023-11-29 05:10:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:50,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:10:50,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:10:50,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:10:50,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-29 05:10:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:50,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:10:50,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:50,631 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 17 treesize of output 9 [2023-11-29 05:10:50,639 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 05:10:50,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:10:50,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:10:50,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162235362] [2023-11-29 05:10:50,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162235362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:10:50,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:10:50,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:10:50,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499829912] [2023-11-29 05:10:50,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:10:50,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:10:50,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:10:50,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:10:50,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:10:50,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 56 [2023-11-29 05:10:50,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 36.2) internal successors, (181), 5 states have internal predecessors, (181), 0 states have call successors, (0), 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 05:10:50,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:10:50,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 56 [2023-11-29 05:10:50,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:10:50,810 INFO L124 PetriNetUnfolderBase]: 21/116 cut-off events. [2023-11-29 05:10:50,811 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2023-11-29 05:10:50,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 116 events. 21/116 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 188 event pairs, 12 based on Foata normal form. 2/117 useless extension candidates. Maximal degree in co-relation 272. Up to 51 conditions per place. [2023-11-29 05:10:50,812 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 23 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-11-29 05:10:50,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 46 transitions, 254 flow [2023-11-29 05:10:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:10:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:10:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2023-11-29 05:10:50,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6636904761904762 [2023-11-29 05:10:50,814 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 223 transitions. [2023-11-29 05:10:50,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 223 transitions. [2023-11-29 05:10:50,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:10:50,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 223 transitions. [2023-11-29 05:10:50,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 37.166666666666664) internal successors, (223), 6 states have internal predecessors, (223), 0 states have call successors, (0), 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 05:10:50,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 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 05:10:50,817 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 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 05:10:50,817 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 198 flow. Second operand 6 states and 223 transitions. [2023-11-29 05:10:50,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 46 transitions, 254 flow [2023-11-29 05:10:50,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 46 transitions, 241 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:10:50,820 INFO L231 Difference]: Finished difference. Result has 61 places, 43 transitions, 195 flow [2023-11-29 05:10:50,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=61, PETRI_TRANSITIONS=43} [2023-11-29 05:10:50,821 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-11-29 05:10:50,821 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 43 transitions, 195 flow [2023-11-29 05:10:50,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.2) internal successors, (181), 5 states have internal predecessors, (181), 0 states have call successors, (0), 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 05:10:50,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:10:50,821 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] [2023-11-29 05:10:50,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-29 05:10:51,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:10:51,022 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:10:51,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:51,022 INFO L85 PathProgramCache]: Analyzing trace with hash -499448345, now seen corresponding path program 1 times [2023-11-29 05:10:51,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:10:51,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404191992] [2023-11-29 05:10:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:51,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:10:51,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:10:51,024 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:10:51,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-29 05:10:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:51,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:10:51,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:51,255 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 17 treesize of output 9 [2023-11-29 05:10:51,265 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 05:10:51,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:51,366 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 05:10:51,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:10:51,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404191992] [2023-11-29 05:10:51,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404191992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:51,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:10:51,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-29 05:10:51,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683950010] [2023-11-29 05:10:51,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:51,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:10:51,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:10:51,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:10:51,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:10:51,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 56 [2023-11-29 05:10:51,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 43 transitions, 195 flow. Second operand has 10 states, 10 states have (on average 36.1) internal successors, (361), 10 states have internal predecessors, (361), 0 states have call successors, (0), 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 05:10:51,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:10:51,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 56 [2023-11-29 05:10:51,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:10:51,781 INFO L124 PetriNetUnfolderBase]: 18/111 cut-off events. [2023-11-29 05:10:51,781 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2023-11-29 05:10:51,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 111 events. 18/111 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 183 event pairs, 7 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 262. Up to 34 conditions per place. [2023-11-29 05:10:51,782 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 21 selfloop transitions, 9 changer transitions 0/48 dead transitions. [2023-11-29 05:10:51,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 48 transitions, 260 flow [2023-11-29 05:10:51,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:10:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:10:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 293 transitions. [2023-11-29 05:10:51,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6540178571428571 [2023-11-29 05:10:51,784 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 293 transitions. [2023-11-29 05:10:51,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 293 transitions. [2023-11-29 05:10:51,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:10:51,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 293 transitions. [2023-11-29 05:10:51,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 36.625) internal successors, (293), 8 states have internal predecessors, (293), 0 states have call successors, (0), 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 05:10:51,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 56.0) internal successors, (504), 9 states have internal predecessors, (504), 0 states have call successors, (0), 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 05:10:51,787 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 56.0) internal successors, (504), 9 states have internal predecessors, (504), 0 states have call successors, (0), 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 05:10:51,787 INFO L175 Difference]: Start difference. First operand has 61 places, 43 transitions, 195 flow. Second operand 8 states and 293 transitions. [2023-11-29 05:10:51,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 48 transitions, 260 flow [2023-11-29 05:10:51,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 48 transitions, 257 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:10:51,790 INFO L231 Difference]: Finished difference. Result has 67 places, 43 transitions, 209 flow [2023-11-29 05:10:51,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=67, PETRI_TRANSITIONS=43} [2023-11-29 05:10:51,790 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2023-11-29 05:10:51,790 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 43 transitions, 209 flow [2023-11-29 05:10:51,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 36.1) internal successors, (361), 10 states have internal predecessors, (361), 0 states have call successors, (0), 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 05:10:51,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:10:51,791 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:51,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-29 05:10:51,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:10:51,992 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:10:51,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash -646151074, now seen corresponding path program 2 times [2023-11-29 05:10:51,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:10:51,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718169626] [2023-11-29 05:10:51,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:10:51,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:10:51,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:10:51,994 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:10:51,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-29 05:10:52,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:10:52,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:52,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:10:52,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:52,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:10:52,171 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-11-29 05:10:52,171 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 18 treesize of output 20 [2023-11-29 05:10:52,175 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 05:10:52,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:10:52,189 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 05:10:52,207 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 05:10:52,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-29 05:10:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:52,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:53,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:10:53,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718169626] [2023-11-29 05:10:53,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718169626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:53,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:10:53,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-29 05:10:53,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748686332] [2023-11-29 05:10:53,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:53,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:10:53,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:10:53,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:10:53,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:10:56,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 56 [2023-11-29 05:10:56,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 43 transitions, 209 flow. Second operand has 18 states, 18 states have (on average 30.77777777777778) internal successors, (554), 18 states have internal predecessors, (554), 0 states have call successors, (0), 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 05:10:56,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:10:56,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 56 [2023-11-29 05:10:56,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:10:57,775 INFO L124 PetriNetUnfolderBase]: 54/203 cut-off events. [2023-11-29 05:10:57,775 INFO L125 PetriNetUnfolderBase]: For 450/451 co-relation queries the response was YES. [2023-11-29 05:10:57,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 203 events. 54/203 cut-off events. For 450/451 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 305 event pairs, 4 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 611. Up to 40 conditions per place. [2023-11-29 05:10:57,777 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 48 selfloop transitions, 20 changer transitions 0/81 dead transitions. [2023-11-29 05:10:57,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 561 flow [2023-11-29 05:10:57,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:10:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:10:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 436 transitions. [2023-11-29 05:10:57,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989010989010989 [2023-11-29 05:10:57,780 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 436 transitions. [2023-11-29 05:10:57,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 436 transitions. [2023-11-29 05:10:57,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:10:57,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 436 transitions. [2023-11-29 05:10:57,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 33.53846153846154) internal successors, (436), 13 states have internal predecessors, (436), 0 states have call successors, (0), 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 05:10:57,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 56.0) internal successors, (784), 14 states have internal predecessors, (784), 0 states have call successors, (0), 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 05:10:57,784 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 56.0) internal successors, (784), 14 states have internal predecessors, (784), 0 states have call successors, (0), 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 05:10:57,784 INFO L175 Difference]: Start difference. First operand has 67 places, 43 transitions, 209 flow. Second operand 13 states and 436 transitions. [2023-11-29 05:10:57,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 561 flow [2023-11-29 05:10:57,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 539 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-29 05:10:57,787 INFO L231 Difference]: Finished difference. Result has 79 places, 54 transitions, 374 flow [2023-11-29 05:10:57,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=374, PETRI_PLACES=79, PETRI_TRANSITIONS=54} [2023-11-29 05:10:57,788 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2023-11-29 05:10:57,788 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 54 transitions, 374 flow [2023-11-29 05:10:57,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 30.77777777777778) internal successors, (554), 18 states have internal predecessors, (554), 0 states have call successors, (0), 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 05:10:57,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:10:57,789 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 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 05:10:57,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-29 05:10:57,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:10:57,989 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:10:57,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:57,990 INFO L85 PathProgramCache]: Analyzing trace with hash -880929488, now seen corresponding path program 2 times [2023-11-29 05:10:57,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:10:57,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099767652] [2023-11-29 05:10:57,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:10:57,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:10:57,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:10:57,992 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:10:57,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-29 05:10:58,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:10:58,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:58,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:10:58,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:10:58,262 INFO L349 Elim1Store]: treesize reduction 48, result has 25.0 percent of original size [2023-11-29 05:10:58,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-11-29 05:10:58,273 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 05:10:58,409 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-11-29 05:10:58,409 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 20 treesize of output 22 [2023-11-29 05:10:58,417 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 05:10:59,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-29 05:10:59,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-11-29 05:10:59,453 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 05:10:59,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:59,542 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 39 treesize of output 35 [2023-11-29 05:11:00,478 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 05:11:00,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:11:00,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099767652] [2023-11-29 05:11:00,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099767652] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:11:00,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:11:00,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2023-11-29 05:11:00,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433291755] [2023-11-29 05:11:00,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:11:00,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:11:00,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:11:00,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:11:00,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:11:06,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:11:10,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:11:14,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:11:15,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 56 [2023-11-29 05:11:15,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 54 transitions, 374 flow. Second operand has 18 states, 18 states have (on average 19.88888888888889) internal successors, (358), 18 states have internal predecessors, (358), 0 states have call successors, (0), 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 05:11:15,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:11:15,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 56 [2023-11-29 05:11:15,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:11:16,895 INFO L124 PetriNetUnfolderBase]: 46/203 cut-off events. [2023-11-29 05:11:16,895 INFO L125 PetriNetUnfolderBase]: For 594/594 co-relation queries the response was YES. [2023-11-29 05:11:16,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 203 events. 46/203 cut-off events. For 594/594 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 354 event pairs, 11 based on Foata normal form. 2/203 useless extension candidates. Maximal degree in co-relation 650. Up to 51 conditions per place. [2023-11-29 05:11:16,897 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 40 selfloop transitions, 20 changer transitions 0/73 dead transitions. [2023-11-29 05:11:16,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 73 transitions, 535 flow [2023-11-29 05:11:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:11:16,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:11:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 344 transitions. [2023-11-29 05:11:16,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36134453781512604 [2023-11-29 05:11:16,900 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 344 transitions. [2023-11-29 05:11:16,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 344 transitions. [2023-11-29 05:11:16,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:11:16,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 344 transitions. [2023-11-29 05:11:16,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 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 05:11:16,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 56.0) internal successors, (1008), 18 states have internal predecessors, (1008), 0 states have call successors, (0), 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 05:11:16,904 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 56.0) internal successors, (1008), 18 states have internal predecessors, (1008), 0 states have call successors, (0), 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 05:11:16,904 INFO L175 Difference]: Start difference. First operand has 79 places, 54 transitions, 374 flow. Second operand 17 states and 344 transitions. [2023-11-29 05:11:16,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 73 transitions, 535 flow [2023-11-29 05:11:16,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 73 transitions, 520 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-29 05:11:16,912 INFO L231 Difference]: Finished difference. Result has 95 places, 57 transitions, 428 flow [2023-11-29 05:11:16,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=428, PETRI_PLACES=95, PETRI_TRANSITIONS=57} [2023-11-29 05:11:16,912 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2023-11-29 05:11:16,913 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 57 transitions, 428 flow [2023-11-29 05:11:16,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.88888888888889) internal successors, (358), 18 states have internal predecessors, (358), 0 states have call successors, (0), 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 05:11:16,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:11:16,913 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:11:16,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-29 05:11:17,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:11:17,114 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:11:17,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:17,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1819085216, now seen corresponding path program 2 times [2023-11-29 05:11:17,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:11:17,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542626370] [2023-11-29 05:11:17,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:11:17,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:11:17,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:11:17,116 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:11:17,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-29 05:11:17,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:11:17,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:11:17,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:11:17,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:17,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:17,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:17,213 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 05:11:17,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:17,223 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 05:11:17,240 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 05:11:17,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-29 05:11:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 05:11:17,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:11:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 05:11:18,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:11:18,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542626370] [2023-11-29 05:11:18,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542626370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:11:18,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:11:18,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 05:11:18,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244938229] [2023-11-29 05:11:18,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:11:18,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:11:18,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:11:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:11:18,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:11:19,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 56 [2023-11-29 05:11:19,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 57 transitions, 428 flow. Second operand has 10 states, 10 states have (on average 32.8) internal successors, (328), 10 states have internal predecessors, (328), 0 states have call successors, (0), 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 05:11:19,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:11:19,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 56 [2023-11-29 05:11:19,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:11:20,162 INFO L124 PetriNetUnfolderBase]: 46/197 cut-off events. [2023-11-29 05:11:20,162 INFO L125 PetriNetUnfolderBase]: For 749/750 co-relation queries the response was YES. [2023-11-29 05:11:20,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 197 events. 46/197 cut-off events. For 749/750 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 333 event pairs, 4 based on Foata normal form. 9/205 useless extension candidates. Maximal degree in co-relation 682. Up to 77 conditions per place. [2023-11-29 05:11:20,164 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 25 selfloop transitions, 19 changer transitions 0/59 dead transitions. [2023-11-29 05:11:20,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 59 transitions, 506 flow [2023-11-29 05:11:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:11:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:11:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2023-11-29 05:11:20,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2023-11-29 05:11:20,166 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 204 transitions. [2023-11-29 05:11:20,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 204 transitions. [2023-11-29 05:11:20,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:11:20,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 204 transitions. [2023-11-29 05:11:20,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 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 05:11:20,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 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 05:11:20,168 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 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 05:11:20,168 INFO L175 Difference]: Start difference. First operand has 95 places, 57 transitions, 428 flow. Second operand 6 states and 204 transitions. [2023-11-29 05:11:20,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 59 transitions, 506 flow [2023-11-29 05:11:20,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 59 transitions, 438 flow, removed 5 selfloop flow, removed 16 redundant places. [2023-11-29 05:11:20,174 INFO L231 Difference]: Finished difference. Result has 84 places, 56 transitions, 395 flow [2023-11-29 05:11:20,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=395, PETRI_PLACES=84, PETRI_TRANSITIONS=56} [2023-11-29 05:11:20,174 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2023-11-29 05:11:20,175 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 56 transitions, 395 flow [2023-11-29 05:11:20,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 32.8) internal successors, (328), 10 states have internal predecessors, (328), 0 states have call successors, (0), 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 05:11:20,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:11:20,175 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 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 05:11:20,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-29 05:11:20,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:11:20,376 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:11:20,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:20,376 INFO L85 PathProgramCache]: Analyzing trace with hash -976178020, now seen corresponding path program 1 times [2023-11-29 05:11:20,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:11:20,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582713705] [2023-11-29 05:11:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:11:20,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:11:20,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:11:20,378 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:11:20,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-29 05:11:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:11:20,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:11:20,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:20,834 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 17 treesize of output 9 [2023-11-29 05:11:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:20,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:11:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:21,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:11:21,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582713705] [2023-11-29 05:11:21,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582713705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:11:21,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:11:21,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 05:11:21,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739186623] [2023-11-29 05:11:21,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:11:21,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:11:21,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:11:21,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:11:21,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:11:21,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 56 [2023-11-29 05:11:21,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 56 transitions, 395 flow. Second operand has 14 states, 14 states have (on average 35.714285714285715) internal successors, (500), 14 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:11:21,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:11:21,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 56 [2023-11-29 05:11:21,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:11:21,985 INFO L124 PetriNetUnfolderBase]: 32/171 cut-off events. [2023-11-29 05:11:21,985 INFO L125 PetriNetUnfolderBase]: For 608/608 co-relation queries the response was YES. [2023-11-29 05:11:21,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 171 events. 32/171 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 243 event pairs, 11 based on Foata normal form. 2/172 useless extension candidates. Maximal degree in co-relation 585. Up to 50 conditions per place. [2023-11-29 05:11:21,986 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 27 selfloop transitions, 15 changer transitions 0/62 dead transitions. [2023-11-29 05:11:21,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 62 transitions, 472 flow [2023-11-29 05:11:21,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:11:21,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 05:11:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 433 transitions. [2023-11-29 05:11:21,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6443452380952381 [2023-11-29 05:11:21,988 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 433 transitions. [2023-11-29 05:11:21,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 433 transitions. [2023-11-29 05:11:21,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:11:21,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 433 transitions. [2023-11-29 05:11:21,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 36.083333333333336) internal successors, (433), 12 states have internal predecessors, (433), 0 states have call successors, (0), 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 05:11:21,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 56.0) internal successors, (728), 13 states have internal predecessors, (728), 0 states have call successors, (0), 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 05:11:21,991 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 56.0) internal successors, (728), 13 states have internal predecessors, (728), 0 states have call successors, (0), 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 05:11:21,991 INFO L175 Difference]: Start difference. First operand has 84 places, 56 transitions, 395 flow. Second operand 12 states and 433 transitions. [2023-11-29 05:11:21,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 62 transitions, 472 flow [2023-11-29 05:11:21,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 62 transitions, 433 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-29 05:11:21,996 INFO L231 Difference]: Finished difference. Result has 85 places, 53 transitions, 361 flow [2023-11-29 05:11:21,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=361, PETRI_PLACES=85, PETRI_TRANSITIONS=53} [2023-11-29 05:11:21,996 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2023-11-29 05:11:21,996 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 53 transitions, 361 flow [2023-11-29 05:11:21,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 35.714285714285715) internal successors, (500), 14 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:11:21,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:11:21,997 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 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 05:11:22,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-29 05:11:22,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:11:22,197 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:11:22,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:22,198 INFO L85 PathProgramCache]: Analyzing trace with hash 836444028, now seen corresponding path program 3 times [2023-11-29 05:11:22,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:11:22,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957790070] [2023-11-29 05:11:22,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:11:22,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:11:22,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:11:22,199 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:11:22,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-29 05:11:22,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 05:11:22,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:11:22,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 05:11:22,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:22,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:22,508 INFO L349 Elim1Store]: treesize reduction 48, result has 25.0 percent of original size [2023-11-29 05:11:22,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-11-29 05:11:22,518 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 05:11:22,656 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 05:11:22,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-29 05:11:22,683 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-11-29 05:11:22,684 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 20 treesize of output 22 [2023-11-29 05:11:24,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-11-29 05:11:24,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2023-11-29 05:11:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:24,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:11:24,725 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 39 treesize of output 35 [2023-11-29 05:11:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:26,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:11:26,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957790070] [2023-11-29 05:11:26,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957790070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:11:26,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:11:26,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2023-11-29 05:11:26,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681059173] [2023-11-29 05:11:26,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:11:26,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:11:26,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:11:26,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:11:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:11:32,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:11:37,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:11:42,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:11:46,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:11:50,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:11:50,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 56 [2023-11-29 05:11:50,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 53 transitions, 361 flow. Second operand has 22 states, 22 states have (on average 19.90909090909091) internal successors, (438), 22 states have internal predecessors, (438), 0 states have call successors, (0), 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 05:11:50,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:11:50,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 56 [2023-11-29 05:11:50,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:11:55,715 INFO L124 PetriNetUnfolderBase]: 58/246 cut-off events. [2023-11-29 05:11:55,715 INFO L125 PetriNetUnfolderBase]: For 922/922 co-relation queries the response was YES. [2023-11-29 05:11:55,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 246 events. 58/246 cut-off events. For 922/922 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 385 event pairs, 5 based on Foata normal form. 3/248 useless extension candidates. Maximal degree in co-relation 870. Up to 46 conditions per place. [2023-11-29 05:11:55,717 INFO L140 encePairwiseOnDemand]: 44/56 looper letters, 59 selfloop transitions, 32 changer transitions 0/102 dead transitions. [2023-11-29 05:11:55,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 843 flow [2023-11-29 05:11:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 05:11:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 05:11:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 552 transitions. [2023-11-29 05:11:55,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2023-11-29 05:11:55,721 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 552 transitions. [2023-11-29 05:11:55,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 552 transitions. [2023-11-29 05:11:55,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:11:55,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 552 transitions. [2023-11-29 05:11:55,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 20.444444444444443) internal successors, (552), 27 states have internal predecessors, (552), 0 states have call successors, (0), 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 05:11:55,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 56.0) internal successors, (1568), 28 states have internal predecessors, (1568), 0 states have call successors, (0), 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 05:11:55,728 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 56.0) internal successors, (1568), 28 states have internal predecessors, (1568), 0 states have call successors, (0), 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 05:11:55,728 INFO L175 Difference]: Start difference. First operand has 85 places, 53 transitions, 361 flow. Second operand 27 states and 552 transitions. [2023-11-29 05:11:55,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 102 transitions, 843 flow [2023-11-29 05:11:55,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 102 transitions, 812 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-11-29 05:11:55,737 INFO L231 Difference]: Finished difference. Result has 109 places, 70 transitions, 611 flow [2023-11-29 05:11:55,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=611, PETRI_PLACES=109, PETRI_TRANSITIONS=70} [2023-11-29 05:11:55,737 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2023-11-29 05:11:55,738 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 70 transitions, 611 flow [2023-11-29 05:11:55,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.90909090909091) internal successors, (438), 22 states have internal predecessors, (438), 0 states have call successors, (0), 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 05:11:55,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:11:55,738 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 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 05:11:55,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-11-29 05:11:55,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:11:55,939 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:11:55,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:55,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1830577731, now seen corresponding path program 4 times [2023-11-29 05:11:55,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:11:55,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314723785] [2023-11-29 05:11:55,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:11:55,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:11:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:11:55,941 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:11:55,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-29 05:11:56,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:11:56,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:11:56,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:11:56,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:56,528 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 17 treesize of output 9 [2023-11-29 05:11:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:56,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:11:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:56,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:11:56,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314723785] [2023-11-29 05:11:56,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314723785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:11:56,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:11:56,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-11-29 05:11:56,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418871340] [2023-11-29 05:11:56,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:11:56,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:11:56,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:11:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:11:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:11:57,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 56 [2023-11-29 05:11:57,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 70 transitions, 611 flow. Second operand has 18 states, 18 states have (on average 35.55555555555556) internal successors, (640), 18 states have internal predecessors, (640), 0 states have call successors, (0), 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 05:11:57,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:11:57,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 56 [2023-11-29 05:11:57,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:11:58,379 INFO L124 PetriNetUnfolderBase]: 42/227 cut-off events. [2023-11-29 05:11:58,379 INFO L125 PetriNetUnfolderBase]: For 1146/1146 co-relation queries the response was YES. [2023-11-29 05:11:58,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 227 events. 42/227 cut-off events. For 1146/1146 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 362 event pairs, 15 based on Foata normal form. 2/228 useless extension candidates. Maximal degree in co-relation 869. Up to 65 conditions per place. [2023-11-29 05:11:58,381 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 36 selfloop transitions, 23 changer transitions 0/82 dead transitions. [2023-11-29 05:11:58,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 82 transitions, 740 flow [2023-11-29 05:11:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:11:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 05:11:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 573 transitions. [2023-11-29 05:11:58,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6395089285714286 [2023-11-29 05:11:58,382 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 573 transitions. [2023-11-29 05:11:58,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 573 transitions. [2023-11-29 05:11:58,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:11:58,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 573 transitions. [2023-11-29 05:11:58,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 35.8125) internal successors, (573), 16 states have internal predecessors, (573), 0 states have call successors, (0), 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 05:11:58,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 56.0) internal successors, (952), 17 states have internal predecessors, (952), 0 states have call successors, (0), 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 05:11:58,385 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 56.0) internal successors, (952), 17 states have internal predecessors, (952), 0 states have call successors, (0), 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 05:11:58,385 INFO L175 Difference]: Start difference. First operand has 109 places, 70 transitions, 611 flow. Second operand 16 states and 573 transitions. [2023-11-29 05:11:58,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 82 transitions, 740 flow [2023-11-29 05:11:58,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 82 transitions, 700 flow, removed 10 selfloop flow, removed 10 redundant places. [2023-11-29 05:11:58,392 INFO L231 Difference]: Finished difference. Result has 115 places, 69 transitions, 606 flow [2023-11-29 05:11:58,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=606, PETRI_PLACES=115, PETRI_TRANSITIONS=69} [2023-11-29 05:11:58,392 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2023-11-29 05:11:58,393 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 69 transitions, 606 flow [2023-11-29 05:11:58,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 35.55555555555556) internal successors, (640), 18 states have internal predecessors, (640), 0 states have call successors, (0), 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 05:11:58,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:11:58,393 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:11:58,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-29 05:11:58,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:11:58,598 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:11:58,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:58,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1011652090, now seen corresponding path program 3 times [2023-11-29 05:11:58,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:11:58,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844821252] [2023-11-29 05:11:58,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:11:58,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:11:58,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:11:58,600 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:11:58,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-29 05:11:58,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:11:58,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:11:58,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:11:58,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:58,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:58,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:58,738 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 05:11:58,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:58,773 INFO L349 Elim1Store]: treesize reduction 48, result has 25.0 percent of original size [2023-11-29 05:11:58,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-11-29 05:11:58,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:58,849 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 05:11:59,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:11:59,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-11-29 05:11:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-29 05:11:59,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:12:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-29 05:12:01,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:12:01,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844821252] [2023-11-29 05:12:01,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844821252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:12:01,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:12:01,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 05:12:01,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742246953] [2023-11-29 05:12:01,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:12:01,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:12:01,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:12:01,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:12:01,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:12:06,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:12:10,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:12:16,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:12:20,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:12:25,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:12:29,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:12:34,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:12:34,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2023-11-29 05:12:34,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 69 transitions, 606 flow. Second operand has 14 states, 14 states have (on average 20.714285714285715) internal successors, (290), 14 states have internal predecessors, (290), 0 states have call successors, (0), 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 05:12:34,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:12:34,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2023-11-29 05:12:34,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:12:35,289 INFO L124 PetriNetUnfolderBase]: 62/244 cut-off events. [2023-11-29 05:12:35,290 INFO L125 PetriNetUnfolderBase]: For 1100/1100 co-relation queries the response was YES. [2023-11-29 05:12:35,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 244 events. 62/244 cut-off events. For 1100/1100 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 368 event pairs, 5 based on Foata normal form. 6/249 useless extension candidates. Maximal degree in co-relation 929. Up to 92 conditions per place. [2023-11-29 05:12:35,291 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 31 selfloop transitions, 29 changer transitions 0/71 dead transitions. [2023-11-29 05:12:35,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 71 transitions, 705 flow [2023-11-29 05:12:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:12:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:12:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2023-11-29 05:12:35,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005102040816326 [2023-11-29 05:12:35,293 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 157 transitions. [2023-11-29 05:12:35,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 157 transitions. [2023-11-29 05:12:35,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:12:35,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 157 transitions. [2023-11-29 05:12:35,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 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 05:12:35,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 56.0) internal successors, (448), 8 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 05:12:35,295 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 56.0) internal successors, (448), 8 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 05:12:35,295 INFO L175 Difference]: Start difference. First operand has 115 places, 69 transitions, 606 flow. Second operand 7 states and 157 transitions. [2023-11-29 05:12:35,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 71 transitions, 705 flow [2023-11-29 05:12:35,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 71 transitions, 615 flow, removed 0 selfloop flow, removed 20 redundant places. [2023-11-29 05:12:35,302 INFO L231 Difference]: Finished difference. Result has 99 places, 67 transitions, 545 flow [2023-11-29 05:12:35,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=545, PETRI_PLACES=99, PETRI_TRANSITIONS=67} [2023-11-29 05:12:35,302 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2023-11-29 05:12:35,302 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 67 transitions, 545 flow [2023-11-29 05:12:35,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.714285714285715) internal successors, (290), 14 states have internal predecessors, (290), 0 states have call successors, (0), 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 05:12:35,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:12:35,303 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 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 05:12:35,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-29 05:12:35,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:12:35,503 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:12:35,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:12:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash -20665590, now seen corresponding path program 5 times [2023-11-29 05:12:35,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:12:35,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294229790] [2023-11-29 05:12:35,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:12:35,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:12:35,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:12:35,505 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:12:35,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-29 05:12:35,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 05:12:35,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:12:35,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:12:35,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:12:36,243 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 17 treesize of output 9 [2023-11-29 05:12:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:12:36,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:12:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:12:36,656 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:12:36,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294229790] [2023-11-29 05:12:36,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294229790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:12:36,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:12:36,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-11-29 05:12:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154438299] [2023-11-29 05:12:36,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:12:36,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:12:36,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:12:36,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:12:36,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:12:37,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 56 [2023-11-29 05:12:37,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 67 transitions, 545 flow. Second operand has 20 states, 20 states have (on average 35.5) internal successors, (710), 20 states have internal predecessors, (710), 0 states have call successors, (0), 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 05:12:37,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:12:37,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 56 [2023-11-29 05:12:37,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:12:38,549 INFO L124 PetriNetUnfolderBase]: 37/216 cut-off events. [2023-11-29 05:12:38,549 INFO L125 PetriNetUnfolderBase]: For 884/884 co-relation queries the response was YES. [2023-11-29 05:12:38,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 216 events. 37/216 cut-off events. For 884/884 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 335 event pairs, 13 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 755. Up to 57 conditions per place. [2023-11-29 05:12:38,552 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 37 selfloop transitions, 23 changer transitions 0/81 dead transitions. [2023-11-29 05:12:38,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 81 transitions, 681 flow [2023-11-29 05:12:38,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:12:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 05:12:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 643 transitions. [2023-11-29 05:12:38,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378968253968254 [2023-11-29 05:12:38,554 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 643 transitions. [2023-11-29 05:12:38,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 643 transitions. [2023-11-29 05:12:38,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:12:38,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 643 transitions. [2023-11-29 05:12:38,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 35.72222222222222) internal successors, (643), 18 states have internal predecessors, (643), 0 states have call successors, (0), 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 05:12:38,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 56.0) internal successors, (1064), 19 states have internal predecessors, (1064), 0 states have call successors, (0), 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 05:12:38,557 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 56.0) internal successors, (1064), 19 states have internal predecessors, (1064), 0 states have call successors, (0), 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 05:12:38,557 INFO L175 Difference]: Start difference. First operand has 99 places, 67 transitions, 545 flow. Second operand 18 states and 643 transitions. [2023-11-29 05:12:38,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 81 transitions, 681 flow [2023-11-29 05:12:38,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 81 transitions, 650 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:12:38,563 INFO L231 Difference]: Finished difference. Result has 113 places, 66 transitions, 550 flow [2023-11-29 05:12:38,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=550, PETRI_PLACES=113, PETRI_TRANSITIONS=66} [2023-11-29 05:12:38,563 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2023-11-29 05:12:38,563 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 66 transitions, 550 flow [2023-11-29 05:12:38,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 35.5) internal successors, (710), 20 states have internal predecessors, (710), 0 states have call successors, (0), 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 05:12:38,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:12:38,564 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 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 05:12:38,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-11-29 05:12:38,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:12:38,765 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-29 05:12:38,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:12:38,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1466041207, now seen corresponding path program 6 times [2023-11-29 05:12:38,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:12:38,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111059705] [2023-11-29 05:12:38,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:12:38,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:12:38,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:12:38,766 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:12:38,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-29 05:12:39,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 05:12:39,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-11-29 05:12:39,162 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 05:12:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 05:12:39,450 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-11-29 05:12:39,450 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 05:12:39,451 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (25 of 26 remaining) [2023-11-29 05:12:39,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (24 of 26 remaining) [2023-11-29 05:12:39,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (23 of 26 remaining) [2023-11-29 05:12:39,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (22 of 26 remaining) [2023-11-29 05:12:39,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (21 of 26 remaining) [2023-11-29 05:12:39,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 26 remaining) [2023-11-29 05:12:39,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 26 remaining) [2023-11-29 05:12:39,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 26 remaining) [2023-11-29 05:12:39,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 26 remaining) [2023-11-29 05:12:39,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 26 remaining) [2023-11-29 05:12:39,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 26 remaining) [2023-11-29 05:12:39,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 26 remaining) [2023-11-29 05:12:39,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 26 remaining) [2023-11-29 05:12:39,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 26 remaining) [2023-11-29 05:12:39,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 26 remaining) [2023-11-29 05:12:39,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 26 remaining) [2023-11-29 05:12:39,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 26 remaining) [2023-11-29 05:12:39,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (8 of 26 remaining) [2023-11-29 05:12:39,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 26 remaining) [2023-11-29 05:12:39,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 26 remaining) [2023-11-29 05:12:39,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 26 remaining) [2023-11-29 05:12:39,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 26 remaining) [2023-11-29 05:12:39,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 26 remaining) [2023-11-29 05:12:39,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 26 remaining) [2023-11-29 05:12:39,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 26 remaining) [2023-11-29 05:12:39,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 26 remaining) [2023-11-29 05:12:39,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-11-29 05:12:39,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:12:39,656 INFO L445 BasicCegarLoop]: Path program histogram: [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:12:39,661 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 05:12:39,662 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 05:12:39,719 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre5 could not be translated [2023-11-29 05:12:39,723 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem7 could not be translated [2023-11-29 05:12:39,723 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated [2023-11-29 05:12:39,724 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 [2023-11-29 05:12:39,724 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 [2023-11-29 05:12:39,725 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem10 could not be translated [2023-11-29 05:12:39,725 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 [2023-11-29 05:12:39,725 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 [2023-11-29 05:12:39,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 05:12:39 BasicIcfg [2023-11-29 05:12:39,734 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 05:12:39,734 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 05:12:39,734 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 05:12:39,735 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 05:12:39,735 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:09:35" (3/4) ... [2023-11-29 05:12:39,737 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-29 05:12:39,738 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 05:12:39,739 INFO L158 Benchmark]: Toolchain (without parser) took 186309.76ms. Allocated memory was 65.0MB in the beginning and 192.9MB in the end (delta: 127.9MB). Free memory was 43.1MB in the beginning and 144.2MB in the end (delta: -101.1MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. [2023-11-29 05:12:39,739 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 65.0MB. Free memory was 41.1MB in the beginning and 41.0MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:12:39,739 INFO L158 Benchmark]: CACSL2BoogieTranslator took 905.34ms. Allocated memory was 65.0MB in the beginning and 90.2MB in the end (delta: 25.2MB). Free memory was 42.9MB in the beginning and 48.0MB in the end (delta: -5.1MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. [2023-11-29 05:12:39,740 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.03ms. Allocated memory is still 90.2MB. Free memory was 48.0MB in the beginning and 45.2MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 05:12:39,740 INFO L158 Benchmark]: Boogie Preprocessor took 70.08ms. Allocated memory is still 90.2MB. Free memory was 45.2MB in the beginning and 42.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 05:12:39,740 INFO L158 Benchmark]: RCFGBuilder took 731.72ms. Allocated memory is still 90.2MB. Free memory was 41.8MB in the beginning and 60.7MB in the end (delta: -18.9MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2023-11-29 05:12:39,741 INFO L158 Benchmark]: TraceAbstraction took 184525.25ms. Allocated memory was 90.2MB in the beginning and 192.9MB in the end (delta: 102.8MB). Free memory was 59.7MB in the beginning and 144.2MB in the end (delta: -84.5MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2023-11-29 05:12:39,741 INFO L158 Benchmark]: Witness Printer took 3.74ms. Allocated memory is still 192.9MB. Free memory is still 144.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:12:39,743 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 65.0MB. Free memory was 41.1MB in the beginning and 41.0MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 905.34ms. Allocated memory was 65.0MB in the beginning and 90.2MB in the end (delta: 25.2MB). Free memory was 42.9MB in the beginning and 48.0MB in the end (delta: -5.1MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.03ms. Allocated memory is still 90.2MB. Free memory was 48.0MB in the beginning and 45.2MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.08ms. Allocated memory is still 90.2MB. Free memory was 45.2MB in the beginning and 42.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 731.72ms. Allocated memory is still 90.2MB. Free memory was 41.8MB in the beginning and 60.7MB in the end (delta: -18.9MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. * TraceAbstraction took 184525.25ms. Allocated memory was 90.2MB in the beginning and 192.9MB in the end (delta: 102.8MB). Free memory was 59.7MB in the beginning and 144.2MB in the end (delta: -84.5MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. * Witness Printer took 3.74ms. Allocated memory is still 192.9MB. Free memory is still 144.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #Ultimate.C_strcpy_#res#1 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1119]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1119. Possible FailurePath: [L1108] 0 char *v; [L1121] 0 pthread_t t1, t2; [L1122] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, t1={15:0}, t2={23:0}, v={0:0}] [L1111] 1 v = malloc(sizeof(char) * 8) [L1112] 1 return 0; [L1123] 0 \read(t1) VAL [\result={0:0}, arg={0:0}, arg={0:0}, v={6:0}] [L1123] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={23:0}, v={6:0}] [L1124] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={23:0}, v={6:0}] [L1116] COND TRUE 2 \read(*v) [L1116] CALL 2 strcpy(v, "Bigshot") [L1116] RET 2 strcpy(v, "Bigshot") [L1117] 2 return 0; [L1125] 0 \read(t2) VAL [\result={0:0}, arg={0:0}, arg={0:0}, v={6:0}] [L1125] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={23:0}, v={6:0}] [L1126] EXPR 0 v[0] [L1126] CALL 0 __VERIFIER_assert(v[0] == 'B') [L1107] COND FALSE 0 !(!expression) VAL [\old(expression)=1, \result={0:0}, arg={0:0}, arg={0:0}, expression=1, v={6:0}] [L1126] RET 0 __VERIFIER_assert(v[0] == 'B') [L1127] 0 return 0; [L1127] 0 return 0; [L1127] 0 return 0; VAL [\result=0, \result={0:0}, arg={0:0}, arg={0:0}, v={6:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1122]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1124]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 73 locations, 26 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 184.3s, OverallIterations: 23, TraceHistogramMax: 9, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 156.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 mSolverCounterUnknown, 3504 SdHoareTripleChecker+Valid, 148.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2897 mSDsluCounter, 1887 SdHoareTripleChecker+Invalid, 145.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1805 mSDsCounter, 121 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12327 IncrementalHoareTripleChecker+Invalid, 12477 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 121 mSolverCounterUnsat, 82 mSDtfsCounter, 12327 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1148 GetRequests, 890 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 11.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=611occurred in iteration=19, InterpolantAutomatonStates: 182, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 19.4s InterpolantComputationTime, 681 NumberOfCodeBlocks, 615 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1054 ConstructedInterpolants, 164 QuantifiedInterpolants, 18131 SizeOfPredicates, 91 NumberOfNonLiveVariables, 2664 ConjunctsInSsa, 248 ConjunctsInUnsatCore, 33 InterpolantComputations, 11 PerfectInterpolantSequences, 389/1244 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-29 05:12:39,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7967754d-3696-4229-95e1-77f7760653ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample