./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:26:04,961 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:26:05,057 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:26:05,064 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:26:05,065 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:26:05,115 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:26:05,116 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:26:05,118 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:26:05,119 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:26:05,120 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:26:05,121 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:26:05,121 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:26:05,122 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:26:05,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:26:05,127 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:26:05,127 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:26:05,127 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:26:05,128 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:26:05,128 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:26:05,128 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:26:05,128 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:26:05,129 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:26:05,129 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:26:05,129 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:26:05,130 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:26:05,130 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:26:05,130 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:26:05,130 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:26:05,131 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:26:05,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:26:05,131 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:26:05,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:26:05,134 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:26:05,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:26:05,135 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:26:05,135 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:26:05,136 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:26:05,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:26:05,136 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:26:05,136 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:26:05,148 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:26:05,148 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:26:05,148 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_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa [2024-11-08 18:26:05,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:26:05,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:26:05,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:26:05,472 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:26:05,473 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:26:05,474 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i Unable to find full path for "g++" [2024-11-08 18:26:07,437 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:26:07,708 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:26:07,709 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i [2024-11-08 18:26:07,728 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/data/eb6811268/ba1bc4ce6985445dadb67f8812856838/FLAG8f9fef02e [2024-11-08 18:26:08,020 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/data/eb6811268/ba1bc4ce6985445dadb67f8812856838 [2024-11-08 18:26:08,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:26:08,027 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:26:08,029 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:26:08,029 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:26:08,039 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:26:08,040 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:26:08" (1/1) ... [2024-11-08 18:26:08,041 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6342e01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:08, skipping insertion in model container [2024-11-08 18:26:08,041 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:26:08" (1/1) ... [2024-11-08 18:26:08,107 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:26:08,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:26:09,039 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:26:09,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:26:09,309 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:26:09,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09 WrapperNode [2024-11-08 18:26:09,310 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:26:09,311 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:26:09,311 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:26:09,311 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:26:09,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (1/1) ... [2024-11-08 18:26:09,383 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (1/1) ... [2024-11-08 18:26:09,505 INFO L138 Inliner]: procedures = 280, calls = 1603, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1769 [2024-11-08 18:26:09,505 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:26:09,506 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:26:09,506 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:26:09,506 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:26:09,519 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (1/1) ... [2024-11-08 18:26:09,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (1/1) ... [2024-11-08 18:26:09,533 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (1/1) ... [2024-11-08 18:26:09,596 INFO L175 MemorySlicer]: Split 1569 memory accesses to 8 slices as follows [2, 5, 259, 5, 1280, 2, 14, 2]. 82 percent of accesses are in the largest equivalence class. The 1548 initializations are split as follows [2, 5, 256, 5, 1280, 0, 0, 0]. The 11 writes are split as follows [0, 0, 1, 0, 0, 1, 8, 1]. [2024-11-08 18:26:09,600 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (1/1) ... [2024-11-08 18:26:09,601 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (1/1) ... [2024-11-08 18:26:09,658 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (1/1) ... [2024-11-08 18:26:09,668 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (1/1) ... [2024-11-08 18:26:09,677 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (1/1) ... [2024-11-08 18:26:09,690 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (1/1) ... [2024-11-08 18:26:09,711 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:26:09,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:26:09,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:26:09,714 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:26:09,715 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (1/1) ... [2024-11-08 18:26:09,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:26:09,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:26:09,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:26:09,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:26:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 18:26:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-08 18:26:09,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-08 18:26:09,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-08 18:26:09,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-08 18:26:09,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-08 18:26:09,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-11-08 18:26:09,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-11-08 18:26:09,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-11-08 18:26:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-11-08 18:26:09,832 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-11-08 18:26:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 18:26:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-08 18:26:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-08 18:26:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-08 18:26:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-08 18:26:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-11-08 18:26:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-11-08 18:26:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-11-08 18:26:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2024-11-08 18:26:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-08 18:26:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:26:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:26:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 18:26:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 18:26:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-08 18:26:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-08 18:26:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-08 18:26:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-08 18:26:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-11-08 18:26:09,837 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-11-08 18:26:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:26:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:26:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 18:26:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 18:26:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-08 18:26:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-08 18:26:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-08 18:26:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-08 18:26:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-08 18:26:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 18:26:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:26:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-08 18:26:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-08 18:26:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-08 18:26:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-08 18:26:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-11-08 18:26:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-11-08 18:26:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-11-08 18:26:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-11-08 18:26:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:26:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:26:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 18:26:09,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 18:26:09,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-08 18:26:09,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-08 18:26:09,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-08 18:26:09,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-08 18:26:09,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:26:09,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:26:09,847 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 18:26:10,125 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:26:10,128 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:26:12,588 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:26:12,589 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:26:57,908 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:26:57,908 INFO L316 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-08 18:26:57,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:26:57 BoogieIcfgContainer [2024-11-08 18:26:57,909 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:26:57,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:26:57,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:26:57,919 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:26:57,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:26:08" (1/3) ... [2024-11-08 18:26:57,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7525c140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:26:57, skipping insertion in model container [2024-11-08 18:26:57,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:26:09" (2/3) ... [2024-11-08 18:26:57,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7525c140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:26:57, skipping insertion in model container [2024-11-08 18:26:57,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:26:57" (3/3) ... [2024-11-08 18:26:57,924 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree-deref.i [2024-11-08 18:26:57,942 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:26:57,942 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2024-11-08 18:26:57,942 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:26:58,101 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-08 18:26:58,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 159 transitions, 338 flow [2024-11-08 18:26:58,356 INFO L124 PetriNetUnfolderBase]: 54/331 cut-off events. [2024-11-08 18:26:58,356 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-08 18:26:58,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 331 events. 54/331 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1721 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2024-11-08 18:26:58,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 159 transitions, 338 flow [2024-11-08 18:26:58,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 159 transitions, 338 flow [2024-11-08 18:26:58,381 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:26:58,388 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@20a5f696, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:26:58,388 INFO L334 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2024-11-08 18:26:58,466 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:26:58,466 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2024-11-08 18:26:58,467 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:26:58,467 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:26:58,467 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:26:58,468 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:26:58,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:26:58,473 INFO L85 PathProgramCache]: Analyzing trace with hash 114536118, now seen corresponding path program 1 times [2024-11-08 18:26:58,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:26:58,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715794311] [2024-11-08 18:26:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:26:58,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:26:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:26:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:26:59,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:26:59,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715794311] [2024-11-08 18:26:59,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715794311] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:26:59,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:26:59,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:26:59,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567753182] [2024-11-08 18:26:59,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:26:59,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:26:59,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:26:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:26:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:27:00,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 159 [2024-11-08 18:27:00,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 159 transitions, 338 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:00,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:27:00,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 159 [2024-11-08 18:27:00,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:27:01,713 INFO L124 PetriNetUnfolderBase]: 3297/7667 cut-off events. [2024-11-08 18:27:01,714 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-08 18:27:01,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12959 conditions, 7667 events. 3297/7667 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 65093 event pairs, 3059 based on Foata normal form. 520/7282 useless extension candidates. Maximal degree in co-relation 11436. Up to 5189 conditions per place. [2024-11-08 18:27:01,790 INFO L140 encePairwiseOnDemand]: 142/159 looper letters, 57 selfloop transitions, 2 changer transitions 0/143 dead transitions. [2024-11-08 18:27:01,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 143 transitions, 424 flow [2024-11-08 18:27:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:27:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:27:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2024-11-08 18:27:01,804 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6834381551362684 [2024-11-08 18:27:01,806 INFO L175 Difference]: Start difference. First operand has 139 places, 159 transitions, 338 flow. Second operand 3 states and 326 transitions. [2024-11-08 18:27:01,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 143 transitions, 424 flow [2024-11-08 18:27:01,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 143 transitions, 424 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 18:27:01,816 INFO L231 Difference]: Finished difference. Result has 138 places, 143 transitions, 310 flow [2024-11-08 18:27:01,818 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=138, PETRI_TRANSITIONS=143} [2024-11-08 18:27:01,821 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, -1 predicate places. [2024-11-08 18:27:01,822 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 143 transitions, 310 flow [2024-11-08 18:27:01,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:01,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:27:01,822 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:27:01,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:27:01,823 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:27:01,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:27:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash 114536119, now seen corresponding path program 1 times [2024-11-08 18:27:01,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:27:01,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616150628] [2024-11-08 18:27:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:01,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:27:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:03,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:27:03,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616150628] [2024-11-08 18:27:03,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616150628] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:27:03,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:27:03,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:27:03,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283036867] [2024-11-08 18:27:03,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:27:03,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:27:03,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:27:03,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:27:03,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:27:03,145 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 159 [2024-11-08 18:27:03,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 143 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:03,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:27:03,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 159 [2024-11-08 18:27:03,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:27:04,547 INFO L124 PetriNetUnfolderBase]: 3297/7665 cut-off events. [2024-11-08 18:27:04,548 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-11-08 18:27:04,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12959 conditions, 7665 events. 3297/7665 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 64911 event pairs, 3059 based on Foata normal form. 2/6758 useless extension candidates. Maximal degree in co-relation 12943. Up to 5189 conditions per place. [2024-11-08 18:27:04,628 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 56 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2024-11-08 18:27:04,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 141 transitions, 422 flow [2024-11-08 18:27:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:27:04,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:27:04,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2024-11-08 18:27:04,631 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.660377358490566 [2024-11-08 18:27:04,631 INFO L175 Difference]: Start difference. First operand has 138 places, 143 transitions, 310 flow. Second operand 3 states and 315 transitions. [2024-11-08 18:27:04,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 141 transitions, 422 flow [2024-11-08 18:27:04,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 141 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:27:04,640 INFO L231 Difference]: Finished difference. Result has 136 places, 141 transitions, 306 flow [2024-11-08 18:27:04,641 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=136, PETRI_TRANSITIONS=141} [2024-11-08 18:27:04,642 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, -3 predicate places. [2024-11-08 18:27:04,642 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 141 transitions, 306 flow [2024-11-08 18:27:04,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:04,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:27:04,643 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:27:04,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:27:04,644 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:27:04,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:27:04,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1598997891, now seen corresponding path program 1 times [2024-11-08 18:27:04,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:27:04,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374305307] [2024-11-08 18:27:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:04,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:27:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:05,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:27:05,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374305307] [2024-11-08 18:27:05,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374305307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:27:05,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:27:05,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:27:05,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169353235] [2024-11-08 18:27:05,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:27:05,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:27:05,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:27:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:27:05,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:27:05,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 159 [2024-11-08 18:27:05,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 141 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:05,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:27:05,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 159 [2024-11-08 18:27:05,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:27:06,517 INFO L124 PetriNetUnfolderBase]: 3297/7672 cut-off events. [2024-11-08 18:27:06,517 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2024-11-08 18:27:06,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12973 conditions, 7672 events. 3297/7672 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 64826 event pairs, 3059 based on Foata normal form. 2/6765 useless extension candidates. Maximal degree in co-relation 12947. Up to 5192 conditions per place. [2024-11-08 18:27:06,580 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 61 selfloop transitions, 2 changer transitions 0/144 dead transitions. [2024-11-08 18:27:06,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 144 transitions, 442 flow [2024-11-08 18:27:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:27:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:27:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2024-11-08 18:27:06,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6708595387840671 [2024-11-08 18:27:06,583 INFO L175 Difference]: Start difference. First operand has 136 places, 141 transitions, 306 flow. Second operand 3 states and 320 transitions. [2024-11-08 18:27:06,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 144 transitions, 442 flow [2024-11-08 18:27:06,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 144 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:27:06,589 INFO L231 Difference]: Finished difference. Result has 137 places, 142 transitions, 316 flow [2024-11-08 18:27:06,590 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=316, PETRI_PLACES=137, PETRI_TRANSITIONS=142} [2024-11-08 18:27:06,590 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, -2 predicate places. [2024-11-08 18:27:06,591 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 142 transitions, 316 flow [2024-11-08 18:27:06,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:06,591 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:27:06,591 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:27:06,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 18:27:06,592 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:27:06,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:27:06,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1599822614, now seen corresponding path program 1 times [2024-11-08 18:27:06,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:27:06,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275284770] [2024-11-08 18:27:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:06,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:27:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:07,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:27:07,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275284770] [2024-11-08 18:27:07,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275284770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:27:07,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:27:07,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:27:07,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253047176] [2024-11-08 18:27:07,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:27:07,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:27:07,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:27:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:27:07,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:27:07,487 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 159 [2024-11-08 18:27:07,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 142 transitions, 316 flow. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:07,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:27:07,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 159 [2024-11-08 18:27:07,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:27:09,020 INFO L124 PetriNetUnfolderBase]: 4083/9595 cut-off events. [2024-11-08 18:27:09,020 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-08 18:27:09,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16351 conditions, 9595 events. 4083/9595 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 85492 event pairs, 2177 based on Foata normal form. 2/8379 useless extension candidates. Maximal degree in co-relation 16331. Up to 3710 conditions per place. [2024-11-08 18:27:09,090 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 130 selfloop transitions, 4 changer transitions 0/214 dead transitions. [2024-11-08 18:27:09,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 214 transitions, 728 flow [2024-11-08 18:27:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:27:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:27:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2024-11-08 18:27:09,092 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7452830188679245 [2024-11-08 18:27:09,093 INFO L175 Difference]: Start difference. First operand has 137 places, 142 transitions, 316 flow. Second operand 4 states and 474 transitions. [2024-11-08 18:27:09,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 214 transitions, 728 flow [2024-11-08 18:27:09,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 214 transitions, 726 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:27:09,100 INFO L231 Difference]: Finished difference. Result has 141 places, 143 transitions, 344 flow [2024-11-08 18:27:09,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=141, PETRI_TRANSITIONS=143} [2024-11-08 18:27:09,101 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2024-11-08 18:27:09,101 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 143 transitions, 344 flow [2024-11-08 18:27:09,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:09,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:27:09,102 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:27:09,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 18:27:09,102 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:27:09,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:27:09,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1599822613, now seen corresponding path program 1 times [2024-11-08 18:27:09,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:27:09,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608565666] [2024-11-08 18:27:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:09,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:27:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:10,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:27:10,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608565666] [2024-11-08 18:27:10,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608565666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:27:10,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:27:10,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:27:10,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627149357] [2024-11-08 18:27:10,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:27:10,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:27:10,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:27:10,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:27:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:27:10,291 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 159 [2024-11-08 18:27:10,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 143 transitions, 344 flow. Second operand has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 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) [2024-11-08 18:27:10,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:27:10,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 159 [2024-11-08 18:27:10,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:27:11,684 INFO L124 PetriNetUnfolderBase]: 4113/9854 cut-off events. [2024-11-08 18:27:11,685 INFO L125 PetriNetUnfolderBase]: For 1621/1621 co-relation queries the response was YES. [2024-11-08 18:27:11,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17749 conditions, 9854 events. 4113/9854 cut-off events. For 1621/1621 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 88481 event pairs, 3767 based on Foata normal form. 1/8713 useless extension candidates. Maximal degree in co-relation 17710. Up to 6647 conditions per place. [2024-11-08 18:27:11,765 INFO L140 encePairwiseOnDemand]: 156/159 looper letters, 66 selfloop transitions, 2 changer transitions 0/145 dead transitions. [2024-11-08 18:27:11,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 145 transitions, 484 flow [2024-11-08 18:27:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:27:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:27:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2024-11-08 18:27:11,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.649895178197065 [2024-11-08 18:27:11,767 INFO L175 Difference]: Start difference. First operand has 141 places, 143 transitions, 344 flow. Second operand 3 states and 310 transitions. [2024-11-08 18:27:11,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 145 transitions, 484 flow [2024-11-08 18:27:11,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 145 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:27:11,776 INFO L231 Difference]: Finished difference. Result has 143 places, 143 transitions, 350 flow [2024-11-08 18:27:11,776 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=143, PETRI_TRANSITIONS=143} [2024-11-08 18:27:11,777 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, 4 predicate places. [2024-11-08 18:27:11,778 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 143 transitions, 350 flow [2024-11-08 18:27:11,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 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) [2024-11-08 18:27:11,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:27:11,779 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1] [2024-11-08 18:27:11,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 18:27:11,780 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:27:11,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:27:11,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1774667174, now seen corresponding path program 1 times [2024-11-08 18:27:11,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:27:11,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910218868] [2024-11-08 18:27:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:11,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:27:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:13,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:27:13,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910218868] [2024-11-08 18:27:13,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910218868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:27:13,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054117461] [2024-11-08 18:27:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:13,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:27:13,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:27:13,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:27:13,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:27:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:14,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 3791 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 18:27:14,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:27:14,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:27:14,514 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 [2024-11-08 18:27:14,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:27:14,650 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 [2024-11-08 18:27:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:14,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:27:14,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:27:14,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-08 18:27:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:15,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054117461] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:27:15,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:27:15,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-08 18:27:15,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742517754] [2024-11-08 18:27:15,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:27:15,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:27:15,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:27:15,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:27:15,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:27:17,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 159 [2024-11-08 18:27:17,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 143 transitions, 350 flow. Second operand has 14 states, 14 states have (on average 82.5) internal successors, (1155), 14 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:17,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:27:17,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 159 [2024-11-08 18:27:17,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:27:19,355 INFO L124 PetriNetUnfolderBase]: 4117/9875 cut-off events. [2024-11-08 18:27:19,355 INFO L125 PetriNetUnfolderBase]: For 1093/1093 co-relation queries the response was YES. [2024-11-08 18:27:19,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17797 conditions, 9875 events. 4117/9875 cut-off events. For 1093/1093 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 88638 event pairs, 3767 based on Foata normal form. 5/8738 useless extension candidates. Maximal degree in co-relation 17771. Up to 6649 conditions per place. [2024-11-08 18:27:19,456 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 75 selfloop transitions, 8 changer transitions 0/160 dead transitions. [2024-11-08 18:27:19,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 160 transitions, 564 flow [2024-11-08 18:27:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:27:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:27:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 653 transitions. [2024-11-08 18:27:19,459 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5867026055705301 [2024-11-08 18:27:19,459 INFO L175 Difference]: Start difference. First operand has 143 places, 143 transitions, 350 flow. Second operand 7 states and 653 transitions. [2024-11-08 18:27:19,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 160 transitions, 564 flow [2024-11-08 18:27:19,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 160 transitions, 560 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:27:19,467 INFO L231 Difference]: Finished difference. Result has 151 places, 149 transitions, 406 flow [2024-11-08 18:27:19,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=151, PETRI_TRANSITIONS=149} [2024-11-08 18:27:19,468 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, 12 predicate places. [2024-11-08 18:27:19,468 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 149 transitions, 406 flow [2024-11-08 18:27:19,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.5) internal successors, (1155), 14 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:19,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:27:19,469 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 18:27:19,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 18:27:19,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 18:27:19,671 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:27:19,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:27:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1282373469, now seen corresponding path program 1 times [2024-11-08 18:27:19,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:27:19,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042615650] [2024-11-08 18:27:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:19,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:27:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 18:27:20,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:27:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042615650] [2024-11-08 18:27:20,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042615650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:27:20,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:27:20,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:27:20,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998665578] [2024-11-08 18:27:20,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:27:20,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:27:20,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:27:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:27:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:27:20,240 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 159 [2024-11-08 18:27:20,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 149 transitions, 406 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:20,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:27:20,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 159 [2024-11-08 18:27:20,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:27:21,504 INFO L124 PetriNetUnfolderBase]: 4465/10520 cut-off events. [2024-11-08 18:27:21,504 INFO L125 PetriNetUnfolderBase]: For 916/916 co-relation queries the response was YES. [2024-11-08 18:27:21,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18991 conditions, 10520 events. 4465/10520 cut-off events. For 916/916 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 96179 event pairs, 2895 based on Foata normal form. 0/9291 useless extension candidates. Maximal degree in co-relation 18954. Up to 4462 conditions per place. [2024-11-08 18:27:21,598 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 101 selfloop transitions, 4 changer transitions 0/183 dead transitions. [2024-11-08 18:27:21,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 183 transitions, 688 flow [2024-11-08 18:27:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:27:21,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:27:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2024-11-08 18:27:21,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7274633123689728 [2024-11-08 18:27:21,606 INFO L175 Difference]: Start difference. First operand has 151 places, 149 transitions, 406 flow. Second operand 3 states and 347 transitions. [2024-11-08 18:27:21,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 183 transitions, 688 flow [2024-11-08 18:27:21,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 183 transitions, 684 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-08 18:27:21,615 INFO L231 Difference]: Finished difference. Result has 150 places, 147 transitions, 406 flow [2024-11-08 18:27:21,616 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=406, PETRI_PLACES=150, PETRI_TRANSITIONS=147} [2024-11-08 18:27:21,616 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, 11 predicate places. [2024-11-08 18:27:21,616 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 147 transitions, 406 flow [2024-11-08 18:27:21,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:21,617 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:27:21,617 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 18:27:21,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 18:27:21,617 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:27:21,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:27:21,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1282373470, now seen corresponding path program 1 times [2024-11-08 18:27:21,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:27:21,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156021345] [2024-11-08 18:27:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:21,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:27:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:22,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:27:22,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156021345] [2024-11-08 18:27:22,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156021345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:27:22,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551012208] [2024-11-08 18:27:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:22,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:27:22,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:27:22,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:27:22,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:27:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:22,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 3830 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 18:27:22,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:27:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:22,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:27:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:22,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551012208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:27:22,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:27:22,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-08 18:27:22,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567653847] [2024-11-08 18:27:22,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:27:22,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 18:27:22,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:27:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 18:27:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-08 18:27:22,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 159 [2024-11-08 18:27:22,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 147 transitions, 406 flow. Second operand has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:22,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:27:22,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 159 [2024-11-08 18:27:22,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:27:24,421 INFO L124 PetriNetUnfolderBase]: 4001/9633 cut-off events. [2024-11-08 18:27:24,421 INFO L125 PetriNetUnfolderBase]: For 1504/1565 co-relation queries the response was YES. [2024-11-08 18:27:24,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17517 conditions, 9633 events. 4001/9633 cut-off events. For 1504/1565 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 86235 event pairs, 3660 based on Foata normal form. 8/8525 useless extension candidates. Maximal degree in co-relation 17474. Up to 6452 conditions per place. [2024-11-08 18:27:24,490 INFO L140 encePairwiseOnDemand]: 154/159 looper letters, 75 selfloop transitions, 8 changer transitions 0/160 dead transitions. [2024-11-08 18:27:24,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 160 transitions, 596 flow [2024-11-08 18:27:24,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 18:27:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 18:27:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 761 transitions. [2024-11-08 18:27:24,494 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5982704402515723 [2024-11-08 18:27:24,494 INFO L175 Difference]: Start difference. First operand has 150 places, 147 transitions, 406 flow. Second operand 8 states and 761 transitions. [2024-11-08 18:27:24,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 160 transitions, 596 flow [2024-11-08 18:27:24,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 160 transitions, 586 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-08 18:27:24,502 INFO L231 Difference]: Finished difference. Result has 160 places, 146 transitions, 422 flow [2024-11-08 18:27:24,502 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=422, PETRI_PLACES=160, PETRI_TRANSITIONS=146} [2024-11-08 18:27:24,506 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, 21 predicate places. [2024-11-08 18:27:24,506 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 146 transitions, 422 flow [2024-11-08 18:27:24,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:24,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:27:24,507 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1] [2024-11-08 18:27:24,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 18:27:24,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:27:24,708 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:27:24,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:27:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash -995981653, now seen corresponding path program 2 times [2024-11-08 18:27:24,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:27:24,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180580294] [2024-11-08 18:27:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:27:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:27,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:27:27,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180580294] [2024-11-08 18:27:27,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180580294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:27:27,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5480638] [2024-11-08 18:27:27,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:27:27,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:27:27,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:27:27,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:27:27,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4b1963-7f90-4294-ba01-1dca669e17e0/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:27:28,399 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:27:28,399 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:27:28,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 4019 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-08 18:27:28,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:27:28,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:27:28,500 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 [2024-11-08 18:27:28,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:27:28,630 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 [2024-11-08 18:27:28,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:27:28,755 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 [2024-11-08 18:27:28,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:27:28,896 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 [2024-11-08 18:27:29,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:27:29,040 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 [2024-11-08 18:27:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:29,096 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:27:29,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:27:29,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-08 18:27:29,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:27:29,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-08 18:27:29,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:27:29,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-08 18:27:30,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:27:30,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-08 18:27:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:27:30,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5480638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:27:30,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:27:30,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2024-11-08 18:27:30,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026817079] [2024-11-08 18:27:30,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:27:30,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 18:27:30,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:27:30,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 18:27:30,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992