./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme --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 c488feb98493d291286969cd9fdbd15fc14c729caece3fe94bd3c70430190936 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:51:18,438 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:51:18,516 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:51:18,521 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:51:18,522 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:51:18,551 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:51:18,552 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:51:18,553 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:51:18,554 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:51:18,554 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:51:18,555 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:51:18,555 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:51:18,556 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:51:18,557 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:51:18,558 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:51:18,558 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:51:18,559 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:51:18,559 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:51:18,560 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:51:18,561 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:51:18,561 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:51:18,562 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:51:18,563 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:51:18,563 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:51:18,564 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:51:18,564 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:51:18,565 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:51:18,565 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:51:18,566 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:51:18,567 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:51:18,567 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:51:18,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:51:18,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:18,568 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:51:18,569 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:51:18,569 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:51:18,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:51:18,570 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:51:18,571 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:51:18,571 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:51:18,572 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:51:18,572 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_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c488feb98493d291286969cd9fdbd15fc14c729caece3fe94bd3c70430190936 [2023-11-26 11:51:18,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:51:18,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:51:18,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:51:18,873 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:51:18,874 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:51:18,875 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr-deref.i [2023-11-26 11:51:22,230 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:51:22,633 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:51:22,635 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr-deref.i [2023-11-26 11:51:22,664 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/data/14235ab53/ddc2ad5d37614638b58d393e94b250fe/FLAGd46572b07 [2023-11-26 11:51:22,683 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/data/14235ab53/ddc2ad5d37614638b58d393e94b250fe [2023-11-26 11:51:22,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:51:22,694 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:51:22,697 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:22,697 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:51:22,703 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:51:22,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:22" (1/1) ... [2023-11-26 11:51:22,707 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d79104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:22, skipping insertion in model container [2023-11-26 11:51:22,707 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:22" (1/1) ... [2023-11-26 11:51:22,778 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:51:23,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:23,494 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:51:23,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:23,702 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:51:23,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23 WrapperNode [2023-11-26 11:51:23,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:23,703 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:23,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:51:23,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:51:23,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (1/1) ... [2023-11-26 11:51:23,736 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (1/1) ... [2023-11-26 11:51:23,769 INFO L138 Inliner]: procedures = 371, calls = 32, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 124 [2023-11-26 11:51:23,770 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:23,771 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:51:23,771 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:51:23,771 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:51:23,781 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (1/1) ... [2023-11-26 11:51:23,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (1/1) ... [2023-11-26 11:51:23,788 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (1/1) ... [2023-11-26 11:51:23,818 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [1, 5, 14, 1]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0, 0]. The 14 writes are split as follows [1, 2, 10, 1]. [2023-11-26 11:51:23,818 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (1/1) ... [2023-11-26 11:51:23,819 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (1/1) ... [2023-11-26 11:51:23,834 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (1/1) ... [2023-11-26 11:51:23,837 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (1/1) ... [2023-11-26 11:51:23,841 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (1/1) ... [2023-11-26 11:51:23,843 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (1/1) ... [2023-11-26 11:51:23,849 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:51:23,850 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:51:23,850 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:51:23,851 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:51:23,852 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (1/1) ... [2023-11-26 11:51:23,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:23,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:23,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:51:23,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:51:23,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:51:23,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:51:23,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:51:23,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 11:51:23,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-26 11:51:23,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:51:23,932 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 11:51:23,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:51:23,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:51:23,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:51:23,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:51:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:51:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:51:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:51:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:51:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 11:51:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:51:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:51:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:51:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:51:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 11:51:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-26 11:51:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-26 11:51:23,935 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-26 11:51:23,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:51:23,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:51:23,937 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:51:24,166 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:51:24,170 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:51:24,738 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:51:24,980 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:51:24,980 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:51:24,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:24 BoogieIcfgContainer [2023-11-26 11:51:24,982 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:51:24,984 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:51:24,984 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:51:24,987 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:51:24,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:51:22" (1/3) ... [2023-11-26 11:51:24,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e31c184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:24, skipping insertion in model container [2023-11-26 11:51:24,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:23" (2/3) ... [2023-11-26 11:51:24,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e31c184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:24, skipping insertion in model container [2023-11-26 11:51:24,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:24" (3/3) ... [2023-11-26 11:51:24,990 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr-deref.i [2023-11-26 11:51:25,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:51:25,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-26 11:51:25,011 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:51:25,069 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 11:51:25,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 74 transitions, 152 flow [2023-11-26 11:51:25,145 INFO L124 PetriNetUnfolderBase]: 1/73 cut-off events. [2023-11-26 11:51:25,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:51:25,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 73 events. 1/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 169 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-26 11:51:25,148 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 74 transitions, 152 flow [2023-11-26 11:51:25,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 73 transitions, 149 flow [2023-11-26 11:51:25,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:51:25,183 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@d08391f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:51:25,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-26 11:51:25,188 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:51:25,188 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-26 11:51:25,189 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:51:25,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:25,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:51:25,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:25,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:25,198 INFO L85 PathProgramCache]: Analyzing trace with hash 392809, now seen corresponding path program 1 times [2023-11-26 11:51:25,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:25,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804498046] [2023-11-26 11:51:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:25,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:25,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804498046] [2023-11-26 11:51:25,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804498046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:25,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:25,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:25,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978355339] [2023-11-26 11:51:25,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:25,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:25,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:25,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:25,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:25,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2023-11-26 11:51:25,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:25,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:25,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2023-11-26 11:51:25,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:25,816 INFO L124 PetriNetUnfolderBase]: 64/270 cut-off events. [2023-11-26 11:51:25,816 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 11:51:25,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 270 events. 64/270 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1246 event pairs, 63 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 377. Up to 153 conditions per place. [2023-11-26 11:51:25,825 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 25 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-11-26 11:51:25,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 205 flow [2023-11-26 11:51:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:51:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-11-26 11:51:25,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7747747747747747 [2023-11-26 11:51:25,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-11-26 11:51:25,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-11-26 11:51:25,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:25,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-11-26 11:51:25,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:25,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:25,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:25,867 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 149 flow. Second operand 3 states and 172 transitions. [2023-11-26 11:51:25,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 205 flow [2023-11-26 11:51:25,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:25,880 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 160 flow [2023-11-26 11:51:25,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-11-26 11:51:25,888 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 2 predicate places. [2023-11-26 11:51:25,888 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 160 flow [2023-11-26 11:51:25,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:25,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:25,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-26 11:51:25,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:51:25,889 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:25,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:25,891 INFO L85 PathProgramCache]: Analyzing trace with hash 12174669, now seen corresponding path program 1 times [2023-11-26 11:51:25,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:25,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787413474] [2023-11-26 11:51:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:25,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:26,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:26,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787413474] [2023-11-26 11:51:26,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787413474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:26,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681008072] [2023-11-26 11:51:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:26,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:26,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:26,078 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:26,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:51:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:26,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:51:26,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:26,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:26,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681008072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:26,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:26,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 11:51:26,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862365130] [2023-11-26 11:51:26,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:26,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:51:26,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:26,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:51:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:26,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2023-11-26 11:51:26,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 49.142857142857146) internal successors, (344), 7 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:26,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:26,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2023-11-26 11:51:26,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:26,481 INFO L124 PetriNetUnfolderBase]: 64/273 cut-off events. [2023-11-26 11:51:26,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:51:26,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 273 events. 64/273 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1243 event pairs, 63 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 432. Up to 153 conditions per place. [2023-11-26 11:51:26,485 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 25 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2023-11-26 11:51:26,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 232 flow [2023-11-26 11:51:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:51:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:51:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 321 transitions. [2023-11-26 11:51:26,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.722972972972973 [2023-11-26 11:51:26,489 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 321 transitions. [2023-11-26 11:51:26,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 321 transitions. [2023-11-26 11:51:26,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:26,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 321 transitions. [2023-11-26 11:51:26,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.5) internal successors, (321), 6 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:26,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:26,495 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:26,495 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 160 flow. Second operand 6 states and 321 transitions. [2023-11-26 11:51:26,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 77 transitions, 232 flow [2023-11-26 11:51:26,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 228 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:26,499 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 192 flow [2023-11-26 11:51:26,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2023-11-26 11:51:26,500 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 9 predicate places. [2023-11-26 11:51:26,500 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 192 flow [2023-11-26 11:51:26,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.142857142857146) internal successors, (344), 7 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:26,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:26,501 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-26 11:51:26,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:26,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:26,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:26,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:26,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1915918185, now seen corresponding path program 2 times [2023-11-26 11:51:26,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:26,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451247952] [2023-11-26 11:51:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:26,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:51:26,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:26,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451247952] [2023-11-26 11:51:26,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451247952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:26,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:26,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:26,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257078041] [2023-11-26 11:51:26,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:26,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:26,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:26,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:26,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:26,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 74 [2023-11-26 11:51:26,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:26,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:26,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 74 [2023-11-26 11:51:26,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:27,032 INFO L124 PetriNetUnfolderBase]: 64/269 cut-off events. [2023-11-26 11:51:27,032 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:51:27,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 269 events. 64/269 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1214 event pairs, 63 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 421. Up to 155 conditions per place. [2023-11-26 11:51:27,039 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 28 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-11-26 11:51:27,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 73 transitions, 248 flow [2023-11-26 11:51:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:51:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-11-26 11:51:27,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2023-11-26 11:51:27,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-11-26 11:51:27,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-11-26 11:51:27,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:27,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-11-26 11:51:27,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:27,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:27,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:27,048 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 192 flow. Second operand 3 states and 158 transitions. [2023-11-26 11:51:27,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 73 transitions, 248 flow [2023-11-26 11:51:27,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 73 transitions, 234 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:27,053 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 178 flow [2023-11-26 11:51:27,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2023-11-26 11:51:27,055 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-11-26 11:51:27,055 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 178 flow [2023-11-26 11:51:27,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:27,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:27,056 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-26 11:51:27,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:51:27,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:27,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:27,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1915918186, now seen corresponding path program 1 times [2023-11-26 11:51:27,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:27,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390258539] [2023-11-26 11:51:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:27,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:27,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:27,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390258539] [2023-11-26 11:51:27,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390258539] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:27,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089201087] [2023-11-26 11:51:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:27,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:27,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:27,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:27,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:51:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:27,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:51:27,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:27,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:27,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089201087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:27,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:27,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-26 11:51:27,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571326505] [2023-11-26 11:51:27,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:27,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:51:27,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:27,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:51:27,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:51:27,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2023-11-26 11:51:27,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 49.07692307692308) internal successors, (638), 13 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:27,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:27,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2023-11-26 11:51:27,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:27,635 INFO L124 PetriNetUnfolderBase]: 64/275 cut-off events. [2023-11-26 11:51:27,635 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-26 11:51:27,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 275 events. 64/275 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1234 event pairs, 63 based on Foata normal form. 6/222 useless extension candidates. Maximal degree in co-relation 423. Up to 153 conditions per place. [2023-11-26 11:51:27,638 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 25 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2023-11-26 11:51:27,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 79 transitions, 286 flow [2023-11-26 11:51:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:51:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:51:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 618 transitions. [2023-11-26 11:51:27,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6959459459459459 [2023-11-26 11:51:27,642 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 618 transitions. [2023-11-26 11:51:27,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 618 transitions. [2023-11-26 11:51:27,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:27,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 618 transitions. [2023-11-26 11:51:27,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 51.5) internal successors, (618), 12 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:27,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:27,649 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:27,650 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 178 flow. Second operand 12 states and 618 transitions. [2023-11-26 11:51:27,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 79 transitions, 286 flow [2023-11-26 11:51:27,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 79 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:51:27,654 INFO L231 Difference]: Finished difference. Result has 97 places, 79 transitions, 254 flow [2023-11-26 11:51:27,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=254, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2023-11-26 11:51:27,656 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 21 predicate places. [2023-11-26 11:51:27,656 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 254 flow [2023-11-26 11:51:27,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 49.07692307692308) internal successors, (638), 13 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:27,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:27,657 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-26 11:51:27,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:27,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:27,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:27,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:27,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1786711274, now seen corresponding path program 2 times [2023-11-26 11:51:27,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:27,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564804704] [2023-11-26 11:51:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:27,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:27,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:27,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564804704] [2023-11-26 11:51:27,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564804704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:27,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:27,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:27,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040723917] [2023-11-26 11:51:27,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:27,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:27,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:27,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:27,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:28,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 74 [2023-11-26 11:51:28,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:28,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 74 [2023-11-26 11:51:28,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:28,228 INFO L124 PetriNetUnfolderBase]: 64/271 cut-off events. [2023-11-26 11:51:28,229 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-26 11:51:28,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 271 events. 64/271 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1206 event pairs, 63 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 421. Up to 161 conditions per place. [2023-11-26 11:51:28,233 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 32 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-26 11:51:28,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 75 transitions, 318 flow [2023-11-26 11:51:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:51:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-26 11:51:28,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7297297297297297 [2023-11-26 11:51:28,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-26 11:51:28,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-26 11:51:28,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:28,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-26 11:51:28,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,238 INFO L175 Difference]: Start difference. First operand has 97 places, 79 transitions, 254 flow. Second operand 3 states and 162 transitions. [2023-11-26 11:51:28,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 75 transitions, 318 flow [2023-11-26 11:51:28,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 75 transitions, 270 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-26 11:51:28,249 INFO L231 Difference]: Finished difference. Result has 90 places, 75 transitions, 206 flow [2023-11-26 11:51:28,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2023-11-26 11:51:28,253 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 14 predicate places. [2023-11-26 11:51:28,253 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 206 flow [2023-11-26 11:51:28,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:28,254 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-26 11:51:28,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:51:28,254 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:28,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:28,255 INFO L85 PathProgramCache]: Analyzing trace with hash -957374000, now seen corresponding path program 1 times [2023-11-26 11:51:28,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:28,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3294106] [2023-11-26 11:51:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:28,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:28,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:28,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3294106] [2023-11-26 11:51:28,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3294106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:28,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:28,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:28,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136799394] [2023-11-26 11:51:28,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:28,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:51:28,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:28,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:51:28,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:51:28,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2023-11-26 11:51:28,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:28,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2023-11-26 11:51:28,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:28,830 INFO L124 PetriNetUnfolderBase]: 77/321 cut-off events. [2023-11-26 11:51:28,830 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-26 11:51:28,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 321 events. 77/321 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1503 event pairs, 55 based on Foata normal form. 1/261 useless extension candidates. Maximal degree in co-relation 512. Up to 145 conditions per place. [2023-11-26 11:51:28,833 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 51 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-11-26 11:51:28,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 336 flow [2023-11-26 11:51:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:51:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 212 transitions. [2023-11-26 11:51:28,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7162162162162162 [2023-11-26 11:51:28,835 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 212 transitions. [2023-11-26 11:51:28,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 212 transitions. [2023-11-26 11:51:28,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:28,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 212 transitions. [2023-11-26 11:51:28,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,838 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,838 INFO L175 Difference]: Start difference. First operand has 90 places, 75 transitions, 206 flow. Second operand 4 states and 212 transitions. [2023-11-26 11:51:28,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 336 flow [2023-11-26 11:51:28,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:51:28,842 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 209 flow [2023-11-26 11:51:28,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2023-11-26 11:51:28,843 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 14 predicate places. [2023-11-26 11:51:28,843 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 209 flow [2023-11-26 11:51:28,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:28,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:28,844 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-26 11:51:28,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:51:28,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:28,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:28,844 INFO L85 PathProgramCache]: Analyzing trace with hash -957373999, now seen corresponding path program 1 times [2023-11-26 11:51:28,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:28,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446894365] [2023-11-26 11:51:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:28,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:29,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:29,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446894365] [2023-11-26 11:51:29,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446894365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:29,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:29,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:29,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926008255] [2023-11-26 11:51:29,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:29,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:29,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:29,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 74 [2023-11-26 11:51:29,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:29,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:29,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 74 [2023-11-26 11:51:29,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:29,507 INFO L124 PetriNetUnfolderBase]: 84/337 cut-off events. [2023-11-26 11:51:29,507 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-11-26 11:51:29,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 337 events. 84/337 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1623 event pairs, 54 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 573. Up to 131 conditions per place. [2023-11-26 11:51:29,510 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 53 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2023-11-26 11:51:29,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 89 transitions, 362 flow [2023-11-26 11:51:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:51:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:51:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 251 transitions. [2023-11-26 11:51:29,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6783783783783783 [2023-11-26 11:51:29,513 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 251 transitions. [2023-11-26 11:51:29,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 251 transitions. [2023-11-26 11:51:29,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:29,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 251 transitions. [2023-11-26 11:51:29,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 50.2) internal successors, (251), 5 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:29,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:29,516 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:29,516 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 209 flow. Second operand 5 states and 251 transitions. [2023-11-26 11:51:29,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 89 transitions, 362 flow [2023-11-26 11:51:29,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 89 transitions, 360 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:29,520 INFO L231 Difference]: Finished difference. Result has 91 places, 72 transitions, 222 flow [2023-11-26 11:51:29,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=91, PETRI_TRANSITIONS=72} [2023-11-26 11:51:29,521 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 15 predicate places. [2023-11-26 11:51:29,522 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 72 transitions, 222 flow [2023-11-26 11:51:29,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:29,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:29,522 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:29,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:51:29,522 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:29,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:29,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1603266961, now seen corresponding path program 1 times [2023-11-26 11:51:29,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:29,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862035035] [2023-11-26 11:51:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:29,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:29,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:29,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862035035] [2023-11-26 11:51:29,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862035035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:29,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:29,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:51:29,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187092860] [2023-11-26 11:51:29,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:29,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:51:29,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:29,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:51:29,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:30,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 74 [2023-11-26 11:51:30,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 72 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 40.42857142857143) internal successors, (283), 7 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:30,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:30,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 74 [2023-11-26 11:51:30,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:30,548 INFO L124 PetriNetUnfolderBase]: 73/312 cut-off events. [2023-11-26 11:51:30,548 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-26 11:51:30,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 312 events. 73/312 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1468 event pairs, 50 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 582. Up to 107 conditions per place. [2023-11-26 11:51:30,551 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 43 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2023-11-26 11:51:30,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 78 transitions, 336 flow [2023-11-26 11:51:30,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:51:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:51:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 313 transitions. [2023-11-26 11:51:30,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6042471042471043 [2023-11-26 11:51:30,554 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 313 transitions. [2023-11-26 11:51:30,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 313 transitions. [2023-11-26 11:51:30,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:30,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 313 transitions. [2023-11-26 11:51:30,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 44.714285714285715) internal successors, (313), 7 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:30,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:30,558 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:30,558 INFO L175 Difference]: Start difference. First operand has 91 places, 72 transitions, 222 flow. Second operand 7 states and 313 transitions. [2023-11-26 11:51:30,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 78 transitions, 336 flow [2023-11-26 11:51:30,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 78 transitions, 329 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:51:30,563 INFO L231 Difference]: Finished difference. Result has 92 places, 70 transitions, 225 flow [2023-11-26 11:51:30,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2023-11-26 11:51:30,564 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 16 predicate places. [2023-11-26 11:51:30,564 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 225 flow [2023-11-26 11:51:30,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.42857142857143) internal successors, (283), 7 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:30,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:30,565 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:30,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:51:30,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:30,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:30,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1603266960, now seen corresponding path program 1 times [2023-11-26 11:51:30,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:30,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579364069] [2023-11-26 11:51:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:30,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:31,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:31,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579364069] [2023-11-26 11:51:31,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579364069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:31,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:31,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:51:31,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100764564] [2023-11-26 11:51:31,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:31,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:51:31,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:31,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:51:31,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:31,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 74 [2023-11-26 11:51:31,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:31,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:31,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 74 [2023-11-26 11:51:31,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:31,851 INFO L124 PetriNetUnfolderBase]: 73/301 cut-off events. [2023-11-26 11:51:31,852 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-11-26 11:51:31,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 301 events. 73/301 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1415 event pairs, 52 based on Foata normal form. 1/249 useless extension candidates. Maximal degree in co-relation 569. Up to 136 conditions per place. [2023-11-26 11:51:31,855 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 39 selfloop transitions, 8 changer transitions 3/77 dead transitions. [2023-11-26 11:51:31,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 77 transitions, 344 flow [2023-11-26 11:51:31,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:51:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:51:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 291 transitions. [2023-11-26 11:51:31,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617760617760618 [2023-11-26 11:51:31,858 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 291 transitions. [2023-11-26 11:51:31,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 291 transitions. [2023-11-26 11:51:31,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:31,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 291 transitions. [2023-11-26 11:51:31,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:31,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:31,861 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:31,861 INFO L175 Difference]: Start difference. First operand has 92 places, 70 transitions, 225 flow. Second operand 7 states and 291 transitions. [2023-11-26 11:51:31,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 77 transitions, 344 flow [2023-11-26 11:51:31,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 77 transitions, 330 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 11:51:31,866 INFO L231 Difference]: Finished difference. Result has 90 places, 68 transitions, 223 flow [2023-11-26 11:51:31,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=223, PETRI_PLACES=90, PETRI_TRANSITIONS=68} [2023-11-26 11:51:31,867 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 14 predicate places. [2023-11-26 11:51:31,867 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 68 transitions, 223 flow [2023-11-26 11:51:31,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:31,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:31,868 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:31,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:51:31,868 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:31,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:31,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1153724429, now seen corresponding path program 1 times [2023-11-26 11:51:31,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:31,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325859823] [2023-11-26 11:51:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:31,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:32,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:32,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325859823] [2023-11-26 11:51:32,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325859823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:32,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:32,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:51:32,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225538268] [2023-11-26 11:51:32,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:32,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:51:32,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:32,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:51:32,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:51:32,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 74 [2023-11-26 11:51:32,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 68 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:32,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:32,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 74 [2023-11-26 11:51:32,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:32,518 INFO L124 PetriNetUnfolderBase]: 73/307 cut-off events. [2023-11-26 11:51:32,518 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-11-26 11:51:32,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 307 events. 73/307 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1449 event pairs, 65 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 585. Up to 184 conditions per place. [2023-11-26 11:51:32,522 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 33 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2023-11-26 11:51:32,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 67 transitions, 299 flow [2023-11-26 11:51:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:51:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:51:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2023-11-26 11:51:32,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7081081081081081 [2023-11-26 11:51:32,525 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 262 transitions. [2023-11-26 11:51:32,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 262 transitions. [2023-11-26 11:51:32,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:32,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 262 transitions. [2023-11-26 11:51:32,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 52.4) internal successors, (262), 5 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:32,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:32,530 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:32,531 INFO L175 Difference]: Start difference. First operand has 90 places, 68 transitions, 223 flow. Second operand 5 states and 262 transitions. [2023-11-26 11:51:32,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 67 transitions, 299 flow [2023-11-26 11:51:32,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 67 transitions, 283 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 11:51:32,535 INFO L231 Difference]: Finished difference. Result has 87 places, 67 transitions, 217 flow [2023-11-26 11:51:32,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=87, PETRI_TRANSITIONS=67} [2023-11-26 11:51:32,537 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 11 predicate places. [2023-11-26 11:51:32,537 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 67 transitions, 217 flow [2023-11-26 11:51:32,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:32,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:32,538 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:32,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:51:32,538 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:32,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:32,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1153724428, now seen corresponding path program 1 times [2023-11-26 11:51:32,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:32,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374321545] [2023-11-26 11:51:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:32,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:32,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:32,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374321545] [2023-11-26 11:51:32,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374321545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:32,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:32,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:51:32,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845807031] [2023-11-26 11:51:32,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:32,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:51:32,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:32,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:51:32,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:51:32,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2023-11-26 11:51:32,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 67 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:32,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:32,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2023-11-26 11:51:32,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:33,048 INFO L124 PetriNetUnfolderBase]: 73/306 cut-off events. [2023-11-26 11:51:33,048 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-11-26 11:51:33,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 306 events. 73/306 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1447 event pairs, 65 based on Foata normal form. 1/251 useless extension candidates. Maximal degree in co-relation 564. Up to 184 conditions per place. [2023-11-26 11:51:33,052 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 35 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2023-11-26 11:51:33,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 66 transitions, 297 flow [2023-11-26 11:51:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:51:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:51:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2023-11-26 11:51:33,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324324324324324 [2023-11-26 11:51:33,054 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 234 transitions. [2023-11-26 11:51:33,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 234 transitions. [2023-11-26 11:51:33,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:33,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 234 transitions. [2023-11-26 11:51:33,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:33,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:33,057 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:33,058 INFO L175 Difference]: Start difference. First operand has 87 places, 67 transitions, 217 flow. Second operand 5 states and 234 transitions. [2023-11-26 11:51:33,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 66 transitions, 297 flow [2023-11-26 11:51:33,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 66 transitions, 285 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:51:33,061 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 215 flow [2023-11-26 11:51:33,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2023-11-26 11:51:33,062 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 10 predicate places. [2023-11-26 11:51:33,063 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 215 flow [2023-11-26 11:51:33,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:33,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:33,063 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:33,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:51:33,064 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:33,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1405719306, now seen corresponding path program 1 times [2023-11-26 11:51:33,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:33,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650778013] [2023-11-26 11:51:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:33,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:33,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:33,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650778013] [2023-11-26 11:51:33,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650778013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:33,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:33,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:51:33,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947350838] [2023-11-26 11:51:33,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:33,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:51:33,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:51:33,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:51:33,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 74 [2023-11-26 11:51:33,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:33,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:33,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 74 [2023-11-26 11:51:33,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:33,744 INFO L124 PetriNetUnfolderBase]: 73/307 cut-off events. [2023-11-26 11:51:33,744 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-11-26 11:51:33,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 307 events. 73/307 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1466 event pairs, 50 based on Foata normal form. 1/253 useless extension candidates. Maximal degree in co-relation 563. Up to 110 conditions per place. [2023-11-26 11:51:33,747 INFO L140 encePairwiseOnDemand]: 68/74 looper letters, 42 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-11-26 11:51:33,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 73 transitions, 325 flow [2023-11-26 11:51:33,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:51:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 224 transitions. [2023-11-26 11:51:33,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7567567567567568 [2023-11-26 11:51:33,750 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 224 transitions. [2023-11-26 11:51:33,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 224 transitions. [2023-11-26 11:51:33,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:33,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 224 transitions. [2023-11-26 11:51:33,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:33,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:33,752 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:33,753 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 215 flow. Second operand 4 states and 224 transitions. [2023-11-26 11:51:33,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 73 transitions, 325 flow [2023-11-26 11:51:33,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 313 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:51:33,756 INFO L231 Difference]: Finished difference. Result has 84 places, 65 transitions, 211 flow [2023-11-26 11:51:33,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=211, PETRI_PLACES=84, PETRI_TRANSITIONS=65} [2023-11-26 11:51:33,758 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2023-11-26 11:51:33,758 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 65 transitions, 211 flow [2023-11-26 11:51:33,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:33,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:33,759 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:33,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:51:33,759 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:33,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:33,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1405719305, now seen corresponding path program 1 times [2023-11-26 11:51:33,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:33,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694029742] [2023-11-26 11:51:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:33,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:34,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:34,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694029742] [2023-11-26 11:51:34,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694029742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:34,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:34,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:51:34,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499031529] [2023-11-26 11:51:34,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:34,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:51:34,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:51:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:51:34,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2023-11-26 11:51:34,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 65 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 44.625) internal successors, (357), 8 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:34,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:34,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2023-11-26 11:51:34,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:34,832 INFO L124 PetriNetUnfolderBase]: 73/306 cut-off events. [2023-11-26 11:51:34,832 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-26 11:51:34,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 306 events. 73/306 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1468 event pairs, 50 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 574. Up to 116 conditions per place. [2023-11-26 11:51:34,836 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 49 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-26 11:51:34,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 72 transitions, 329 flow [2023-11-26 11:51:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:51:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2023-11-26 11:51:34,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7612612612612613 [2023-11-26 11:51:34,838 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2023-11-26 11:51:34,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2023-11-26 11:51:34,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:34,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2023-11-26 11:51:34,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:34,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:34,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:34,840 INFO L175 Difference]: Start difference. First operand has 84 places, 65 transitions, 211 flow. Second operand 3 states and 169 transitions. [2023-11-26 11:51:34,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 72 transitions, 329 flow [2023-11-26 11:51:34,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 72 transitions, 319 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:51:34,844 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 203 flow [2023-11-26 11:51:34,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2023-11-26 11:51:34,846 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-11-26 11:51:34,846 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 203 flow [2023-11-26 11:51:34,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 44.625) internal successors, (357), 8 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:34,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:34,847 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:34,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:51:34,847 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:34,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:34,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1598045135, now seen corresponding path program 1 times [2023-11-26 11:51:34,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:34,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607540001] [2023-11-26 11:51:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:34,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:34,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:34,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607540001] [2023-11-26 11:51:34,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607540001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:34,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:34,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:34,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489183809] [2023-11-26 11:51:34,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:34,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:34,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:34,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:34,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:35,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 74 [2023-11-26 11:51:35,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 64 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:35,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 74 [2023-11-26 11:51:35,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:35,138 INFO L124 PetriNetUnfolderBase]: 84/324 cut-off events. [2023-11-26 11:51:35,139 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2023-11-26 11:51:35,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 324 events. 84/324 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1550 event pairs, 60 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 621. Up to 185 conditions per place. [2023-11-26 11:51:35,142 INFO L140 encePairwiseOnDemand]: 68/74 looper letters, 47 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-11-26 11:51:35,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 74 transitions, 338 flow [2023-11-26 11:51:35,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:51:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2023-11-26 11:51:35,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7882882882882883 [2023-11-26 11:51:35,144 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2023-11-26 11:51:35,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2023-11-26 11:51:35,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:35,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2023-11-26 11:51:35,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,147 INFO L175 Difference]: Start difference. First operand has 82 places, 64 transitions, 203 flow. Second operand 3 states and 175 transitions. [2023-11-26 11:51:35,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 74 transitions, 338 flow [2023-11-26 11:51:35,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 74 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:51:35,150 INFO L231 Difference]: Finished difference. Result has 84 places, 67 transitions, 240 flow [2023-11-26 11:51:35,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2023-11-26 11:51:35,151 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2023-11-26 11:51:35,152 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 240 flow [2023-11-26 11:51:35,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:35,152 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:35,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:51:35,153 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:35,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:35,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1598045134, now seen corresponding path program 1 times [2023-11-26 11:51:35,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:35,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456439202] [2023-11-26 11:51:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:35,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:35,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:35,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456439202] [2023-11-26 11:51:35,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456439202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:35,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:35,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:35,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938745878] [2023-11-26 11:51:35,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:35,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:35,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:35,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:35,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:35,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 74 [2023-11-26 11:51:35,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 67 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:35,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 74 [2023-11-26 11:51:35,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:35,498 INFO L124 PetriNetUnfolderBase]: 75/296 cut-off events. [2023-11-26 11:51:35,499 INFO L125 PetriNetUnfolderBase]: For 152/153 co-relation queries the response was YES. [2023-11-26 11:51:35,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 296 events. 75/296 cut-off events. For 152/153 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1360 event pairs, 58 based on Foata normal form. 23/281 useless extension candidates. Maximal degree in co-relation 618. Up to 176 conditions per place. [2023-11-26 11:51:35,502 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 44 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2023-11-26 11:51:35,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 72 transitions, 350 flow [2023-11-26 11:51:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:51:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-11-26 11:51:35,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7792792792792793 [2023-11-26 11:51:35,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-11-26 11:51:35,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-11-26 11:51:35,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:35,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-11-26 11:51:35,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,506 INFO L175 Difference]: Start difference. First operand has 84 places, 67 transitions, 240 flow. Second operand 3 states and 173 transitions. [2023-11-26 11:51:35,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 72 transitions, 350 flow [2023-11-26 11:51:35,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 72 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:51:35,510 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 234 flow [2023-11-26 11:51:35,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2023-11-26 11:51:35,511 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-11-26 11:51:35,511 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 234 flow [2023-11-26 11:51:35,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:35,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:35,512 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:35,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:51:35,512 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:35,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:35,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1971185618, now seen corresponding path program 1 times [2023-11-26 11:51:35,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:35,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478776534] [2023-11-26 11:51:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:35,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:35,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:35,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478776534] [2023-11-26 11:51:35,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478776534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:35,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:35,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:51:35,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668065970] [2023-11-26 11:51:35,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:35,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:51:35,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:35,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:51:35,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:51:35,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2023-11-26 11:51:36,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 234 flow. Second operand has 6 states, 6 states have (on average 45.5) internal successors, (273), 6 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:36,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:36,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2023-11-26 11:51:36,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:36,214 INFO L124 PetriNetUnfolderBase]: 84/316 cut-off events. [2023-11-26 11:51:36,214 INFO L125 PetriNetUnfolderBase]: For 161/164 co-relation queries the response was YES. [2023-11-26 11:51:36,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 316 events. 84/316 cut-off events. For 161/164 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1459 event pairs, 50 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 661. Up to 106 conditions per place. [2023-11-26 11:51:36,218 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 53 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2023-11-26 11:51:36,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 81 transitions, 408 flow [2023-11-26 11:51:36,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:51:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:51:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 305 transitions. [2023-11-26 11:51:36,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6869369369369369 [2023-11-26 11:51:36,220 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 305 transitions. [2023-11-26 11:51:36,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 305 transitions. [2023-11-26 11:51:36,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:36,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 305 transitions. [2023-11-26 11:51:36,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:36,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:36,223 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:36,224 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 234 flow. Second operand 6 states and 305 transitions. [2023-11-26 11:51:36,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 81 transitions, 408 flow [2023-11-26 11:51:36,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:51:36,229 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 238 flow [2023-11-26 11:51:36,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2023-11-26 11:51:36,230 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2023-11-26 11:51:36,230 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 238 flow [2023-11-26 11:51:36,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.5) internal successors, (273), 6 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:36,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:36,231 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:36,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 11:51:36,231 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:36,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1971185619, now seen corresponding path program 1 times [2023-11-26 11:51:36,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:36,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429318347] [2023-11-26 11:51:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:36,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:36,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:36,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429318347] [2023-11-26 11:51:36,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429318347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:36,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:36,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:51:36,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919828400] [2023-11-26 11:51:36,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:36,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:51:36,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:36,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:51:36,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:51:37,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2023-11-26 11:51:37,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 238 flow. Second operand has 9 states, 9 states have (on average 44.666666666666664) internal successors, (402), 9 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:37,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:37,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2023-11-26 11:51:37,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:37,595 INFO L124 PetriNetUnfolderBase]: 96/332 cut-off events. [2023-11-26 11:51:37,595 INFO L125 PetriNetUnfolderBase]: For 178/182 co-relation queries the response was YES. [2023-11-26 11:51:37,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 332 events. 96/332 cut-off events. For 178/182 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1564 event pairs, 57 based on Foata normal form. 10/303 useless extension candidates. Maximal degree in co-relation 727. Up to 164 conditions per place. [2023-11-26 11:51:37,599 INFO L140 encePairwiseOnDemand]: 61/74 looper letters, 48 selfloop transitions, 13 changer transitions 3/84 dead transitions. [2023-11-26 11:51:37,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 427 flow [2023-11-26 11:51:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:51:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:51:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 479 transitions. [2023-11-26 11:51:37,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472972972972973 [2023-11-26 11:51:37,603 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 479 transitions. [2023-11-26 11:51:37,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 479 transitions. [2023-11-26 11:51:37,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:37,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 479 transitions. [2023-11-26 11:51:37,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 47.9) internal successors, (479), 10 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:37,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 74.0) internal successors, (814), 11 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:37,608 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 74.0) internal successors, (814), 11 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:37,608 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 238 flow. Second operand 10 states and 479 transitions. [2023-11-26 11:51:37,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 427 flow [2023-11-26 11:51:37,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 411 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-26 11:51:37,612 INFO L231 Difference]: Finished difference. Result has 89 places, 66 transitions, 267 flow [2023-11-26 11:51:37,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=267, PETRI_PLACES=89, PETRI_TRANSITIONS=66} [2023-11-26 11:51:37,613 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 13 predicate places. [2023-11-26 11:51:37,614 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 66 transitions, 267 flow [2023-11-26 11:51:37,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 44.666666666666664) internal successors, (402), 9 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:37,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:37,614 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:37,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 11:51:37,615 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:37,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:37,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1876929778, now seen corresponding path program 1 times [2023-11-26 11:51:37,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:37,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730373100] [2023-11-26 11:51:37,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:37,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:38,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:38,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730373100] [2023-11-26 11:51:38,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730373100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:38,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:38,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:51:38,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661007672] [2023-11-26 11:51:38,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:38,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:51:38,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:38,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:51:38,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:51:38,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2023-11-26 11:51:38,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 66 transitions, 267 flow. Second operand has 10 states, 10 states have (on average 42.6) internal successors, (426), 10 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:38,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:38,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2023-11-26 11:51:38,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:39,281 INFO L124 PetriNetUnfolderBase]: 90/333 cut-off events. [2023-11-26 11:51:39,281 INFO L125 PetriNetUnfolderBase]: For 215/222 co-relation queries the response was YES. [2023-11-26 11:51:39,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 333 events. 90/333 cut-off events. For 215/222 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1635 event pairs, 11 based on Foata normal form. 14/300 useless extension candidates. Maximal degree in co-relation 748. Up to 130 conditions per place. [2023-11-26 11:51:39,285 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 50 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2023-11-26 11:51:39,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 80 transitions, 438 flow [2023-11-26 11:51:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:51:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:51:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 334 transitions. [2023-11-26 11:51:39,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6447876447876448 [2023-11-26 11:51:39,287 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 334 transitions. [2023-11-26 11:51:39,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 334 transitions. [2023-11-26 11:51:39,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:39,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 334 transitions. [2023-11-26 11:51:39,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 47.714285714285715) internal successors, (334), 7 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:39,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:39,291 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:39,291 INFO L175 Difference]: Start difference. First operand has 89 places, 66 transitions, 267 flow. Second operand 7 states and 334 transitions. [2023-11-26 11:51:39,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 80 transitions, 438 flow [2023-11-26 11:51:39,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 80 transitions, 405 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-11-26 11:51:39,296 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 263 flow [2023-11-26 11:51:39,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=263, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2023-11-26 11:51:39,296 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2023-11-26 11:51:39,297 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 263 flow [2023-11-26 11:51:39,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.6) internal successors, (426), 10 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:39,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:39,297 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:39,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 11:51:39,298 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:39,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:39,298 INFO L85 PathProgramCache]: Analyzing trace with hash 977212461, now seen corresponding path program 1 times [2023-11-26 11:51:39,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:39,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917754831] [2023-11-26 11:51:39,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:39,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:40,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:40,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917754831] [2023-11-26 11:51:40,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917754831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:40,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:40,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-26 11:51:40,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965442013] [2023-11-26 11:51:40,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:40,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:51:40,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:40,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:51:40,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:51:41,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 74 [2023-11-26 11:51:41,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 263 flow. Second operand has 13 states, 13 states have (on average 37.38461538461539) internal successors, (486), 13 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:41,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:41,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 74 [2023-11-26 11:51:41,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:42,319 INFO L124 PetriNetUnfolderBase]: 124/380 cut-off events. [2023-11-26 11:51:42,320 INFO L125 PetriNetUnfolderBase]: For 225/234 co-relation queries the response was YES. [2023-11-26 11:51:42,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 380 events. 124/380 cut-off events. For 225/234 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1743 event pairs, 44 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 863. Up to 198 conditions per place. [2023-11-26 11:51:42,324 INFO L140 encePairwiseOnDemand]: 61/74 looper letters, 61 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2023-11-26 11:51:42,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 93 transitions, 525 flow [2023-11-26 11:51:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:51:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:51:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 494 transitions. [2023-11-26 11:51:42,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5563063063063063 [2023-11-26 11:51:42,331 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 494 transitions. [2023-11-26 11:51:42,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 494 transitions. [2023-11-26 11:51:42,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:42,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 494 transitions. [2023-11-26 11:51:42,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 41.166666666666664) internal successors, (494), 12 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:42,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:42,339 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:42,339 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 263 flow. Second operand 12 states and 494 transitions. [2023-11-26 11:51:42,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 93 transitions, 525 flow [2023-11-26 11:51:42,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 93 transitions, 518 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-26 11:51:42,347 INFO L231 Difference]: Finished difference. Result has 98 places, 75 transitions, 380 flow [2023-11-26 11:51:42,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=380, PETRI_PLACES=98, PETRI_TRANSITIONS=75} [2023-11-26 11:51:42,348 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 22 predicate places. [2023-11-26 11:51:42,348 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 75 transitions, 380 flow [2023-11-26 11:51:42,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.38461538461539) internal successors, (486), 13 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:42,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:42,349 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:42,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 11:51:42,349 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:42,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:42,350 INFO L85 PathProgramCache]: Analyzing trace with hash 977212462, now seen corresponding path program 1 times [2023-11-26 11:51:42,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:42,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531230099] [2023-11-26 11:51:42,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:42,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:51:43,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:43,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531230099] [2023-11-26 11:51:43,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531230099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:43,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:43,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-26 11:51:43,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419701787] [2023-11-26 11:51:43,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:43,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:51:43,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:43,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:51:43,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:51:45,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 74 [2023-11-26 11:51:45,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 75 transitions, 380 flow. Second operand has 12 states, 12 states have (on average 33.5) internal successors, (402), 12 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:45,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:45,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 74 [2023-11-26 11:51:45,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:45,841 INFO L124 PetriNetUnfolderBase]: 150/459 cut-off events. [2023-11-26 11:51:45,841 INFO L125 PetriNetUnfolderBase]: For 604/616 co-relation queries the response was YES. [2023-11-26 11:51:45,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 459 events. 150/459 cut-off events. For 604/616 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2310 event pairs, 62 based on Foata normal form. 12/434 useless extension candidates. Maximal degree in co-relation 1195. Up to 225 conditions per place. [2023-11-26 11:51:45,847 INFO L140 encePairwiseOnDemand]: 62/74 looper letters, 72 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2023-11-26 11:51:45,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 104 transitions, 685 flow [2023-11-26 11:51:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:51:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:51:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 450 transitions. [2023-11-26 11:51:45,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067567567567568 [2023-11-26 11:51:45,850 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 450 transitions. [2023-11-26 11:51:45,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 450 transitions. [2023-11-26 11:51:45,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:45,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 450 transitions. [2023-11-26 11:51:45,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 37.5) internal successors, (450), 12 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:45,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:45,858 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:45,858 INFO L175 Difference]: Start difference. First operand has 98 places, 75 transitions, 380 flow. Second operand 12 states and 450 transitions. [2023-11-26 11:51:45,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 104 transitions, 685 flow [2023-11-26 11:51:45,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 104 transitions, 673 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 11:51:45,872 INFO L231 Difference]: Finished difference. Result has 105 places, 80 transitions, 450 flow [2023-11-26 11:51:45,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=450, PETRI_PLACES=105, PETRI_TRANSITIONS=80} [2023-11-26 11:51:45,873 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 29 predicate places. [2023-11-26 11:51:45,873 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 80 transitions, 450 flow [2023-11-26 11:51:45,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 33.5) internal successors, (402), 12 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:45,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:45,874 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:45,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 11:51:45,874 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-26 11:51:45,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:45,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1944718568, now seen corresponding path program 1 times [2023-11-26 11:51:45,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:45,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985030773] [2023-11-26 11:51:45,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:45,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:51:45,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:51:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:51:46,090 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:51:46,091 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 11:51:46,092 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 52 remaining) [2023-11-26 11:51:46,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 52 remaining) [2023-11-26 11:51:46,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 52 remaining) [2023-11-26 11:51:46,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 52 remaining) [2023-11-26 11:51:46,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 52 remaining) [2023-11-26 11:51:46,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 52 remaining) [2023-11-26 11:51:46,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 52 remaining) [2023-11-26 11:51:46,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 52 remaining) [2023-11-26 11:51:46,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 52 remaining) [2023-11-26 11:51:46,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 52 remaining) [2023-11-26 11:51:46,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 52 remaining) [2023-11-26 11:51:46,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 52 remaining) [2023-11-26 11:51:46,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 52 remaining) [2023-11-26 11:51:46,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 52 remaining) [2023-11-26 11:51:46,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 52 remaining) [2023-11-26 11:51:46,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 52 remaining) [2023-11-26 11:51:46,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 52 remaining) [2023-11-26 11:51:46,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 52 remaining) [2023-11-26 11:51:46,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 52 remaining) [2023-11-26 11:51:46,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 52 remaining) [2023-11-26 11:51:46,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 52 remaining) [2023-11-26 11:51:46,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 52 remaining) [2023-11-26 11:51:46,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 52 remaining) [2023-11-26 11:51:46,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 52 remaining) [2023-11-26 11:51:46,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 52 remaining) [2023-11-26 11:51:46,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 52 remaining) [2023-11-26 11:51:46,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 52 remaining) [2023-11-26 11:51:46,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (24 of 52 remaining) [2023-11-26 11:51:46,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 52 remaining) [2023-11-26 11:51:46,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 52 remaining) [2023-11-26 11:51:46,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 52 remaining) [2023-11-26 11:51:46,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 52 remaining) [2023-11-26 11:51:46,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 52 remaining) [2023-11-26 11:51:46,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 52 remaining) [2023-11-26 11:51:46,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 52 remaining) [2023-11-26 11:51:46,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 52 remaining) [2023-11-26 11:51:46,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 52 remaining) [2023-11-26 11:51:46,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 52 remaining) [2023-11-26 11:51:46,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 52 remaining) [2023-11-26 11:51:46,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 52 remaining) [2023-11-26 11:51:46,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 52 remaining) [2023-11-26 11:51:46,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 52 remaining) [2023-11-26 11:51:46,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 52 remaining) [2023-11-26 11:51:46,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 52 remaining) [2023-11-26 11:51:46,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 52 remaining) [2023-11-26 11:51:46,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 52 remaining) [2023-11-26 11:51:46,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 52 remaining) [2023-11-26 11:51:46,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 52 remaining) [2023-11-26 11:51:46,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 52 remaining) [2023-11-26 11:51:46,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 52 remaining) [2023-11-26 11:51:46,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 52 remaining) [2023-11-26 11:51:46,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 52 remaining) [2023-11-26 11:51:46,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 11:51:46,105 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:46,114 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-26 11:51:46,114 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 11:51:46,170 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-26 11:51:46,173 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated [2023-11-26 11:51:46,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 11:51:46 BasicIcfg [2023-11-26 11:51:46,188 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 11:51:46,188 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 11:51:46,188 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 11:51:46,189 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 11:51:46,189 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:24" (3/4) ... [2023-11-26 11:51:46,190 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-26 11:51:46,217 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-26 11:51:46,221 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated [2023-11-26 11:51:46,257 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 11:51:46,257 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 11:51:46,258 INFO L158 Benchmark]: Toolchain (without parser) took 23564.32ms. Allocated memory was 140.5MB in the beginning and 453.0MB in the end (delta: 312.5MB). Free memory was 100.4MB in the beginning and 392.6MB in the end (delta: -292.3MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. [2023-11-26 11:51:46,258 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 140.5MB. Free memory is still 88.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:51:46,258 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1005.47ms. Allocated memory was 140.5MB in the beginning and 201.3MB in the end (delta: 60.8MB). Free memory was 100.1MB in the beginning and 161.1MB in the end (delta: -61.0MB). Peak memory consumption was 44.5MB. Max. memory is 16.1GB. [2023-11-26 11:51:46,259 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.41ms. Allocated memory is still 201.3MB. Free memory was 161.1MB in the beginning and 158.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:51:46,259 INFO L158 Benchmark]: Boogie Preprocessor took 79.01ms. Allocated memory is still 201.3MB. Free memory was 158.6MB in the beginning and 154.8MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 11:51:46,260 INFO L158 Benchmark]: RCFGBuilder took 1131.99ms. Allocated memory is still 201.3MB. Free memory was 154.8MB in the beginning and 162.1MB in the end (delta: -7.4MB). Peak memory consumption was 56.6MB. Max. memory is 16.1GB. [2023-11-26 11:51:46,260 INFO L158 Benchmark]: TraceAbstraction took 21203.68ms. Allocated memory was 201.3MB in the beginning and 453.0MB in the end (delta: 251.7MB). Free memory was 162.1MB in the beginning and 397.9MB in the end (delta: -235.7MB). Peak memory consumption was 271.8MB. Max. memory is 16.1GB. [2023-11-26 11:51:46,260 INFO L158 Benchmark]: Witness Printer took 69.01ms. Allocated memory is still 453.0MB. Free memory was 397.9MB in the beginning and 392.6MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 11:51:46,262 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 140.5MB. Free memory is still 88.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1005.47ms. Allocated memory was 140.5MB in the beginning and 201.3MB in the end (delta: 60.8MB). Free memory was 100.1MB in the beginning and 161.1MB in the end (delta: -61.0MB). Peak memory consumption was 44.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.41ms. Allocated memory is still 201.3MB. Free memory was 161.1MB in the beginning and 158.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 79.01ms. Allocated memory is still 201.3MB. Free memory was 158.6MB in the beginning and 154.8MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1131.99ms. Allocated memory is still 201.3MB. Free memory was 154.8MB in the beginning and 162.1MB in the end (delta: -7.4MB). Peak memory consumption was 56.6MB. Max. memory is 16.1GB. * TraceAbstraction took 21203.68ms. Allocated memory was 201.3MB in the beginning and 453.0MB in the end (delta: 251.7MB). Free memory was 162.1MB in the beginning and 397.9MB in the end (delta: -235.7MB). Peak memory consumption was 271.8MB. Max. memory is 16.1GB. * Witness Printer took 69.01ms. Allocated memory is still 453.0MB. Free memory was 397.9MB in the beginning and 392.6MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1243] 0 pthread_mutex_t mutex[10]; [L1243] 0 pthread_mutex_t mutex[10]; [L1244] 0 struct s *slot[10]; [L1244] 0 struct s *slot[10]; [L1254] 0 int i = 0; VAL [i=0, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=1, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=2, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=3, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=4, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=5, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=6, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=7, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=8, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=9, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=10, mutex={1:0}, slot={2:0}] [L1254] COND FALSE 0 !(i < 10) [L1256] 0 int j = __VERIFIER_nondet_int(); [L1257] CALL 0 assume_abort_if_not(0 <= j && j < 10) [L11] COND FALSE 0 !(!cond) [L1257] RET 0 assume_abort_if_not(0 <= j && j < 10) [L1258] 0 struct s *p; [L1259] 0 pthread_t t1; [L1260] CALL, EXPR 0 new(1) [L1233] 0 struct s *p = malloc(sizeof(struct s)); [L1234] 0 p->datum = x VAL [mutex={1:0}, slot={2:0}] [L1235] 0 p->next = ((void *)0) [L1236] 0 return p; [L1260] RET, EXPR 0 new(1) [L1260] 0 slot[j] = new(1) [L1261] CALL, EXPR 0 new(2) [L1233] 0 struct s *p = malloc(sizeof(struct s)); [L1234] 0 p->datum = x VAL [mutex={1:0}, slot={2:0}] [L1235] 0 p->next = ((void *)0) [L1236] 0 return p; [L1261] RET, EXPR 0 new(2) [L1261] EXPR 0 slot[j] [L1261] CALL 0 list_add(new(2), slot[j]) [L1239] EXPR 0 list->next [L1239] 0 struct s *temp = list->next; [L1240] 0 list->next = node VAL [mutex={1:0}, slot={2:0}] [L1241] 0 node->next = temp [L1261] RET 0 list_add(new(2), slot[j]) [L1262] FCALL, FORK 0 pthread_create(&t1, ((void *)0), t_fun, ((void *)0)) VAL [j=9, mutex={1:0}, slot={2:0}, t1={9:0}] [L1246] 1 int i = __VERIFIER_nondet_int(); [L1247] CALL 1 assume_abort_if_not(0 <= i && i < 10) [L11] COND FALSE 1 !(!cond) [L1247] RET 1 assume_abort_if_not(0 <= i && i < 10) [L1249] CALL, EXPR 1 new(3) [L1233] 1 struct s *p = malloc(sizeof(struct s)); [L1234] 1 p->datum = x VAL [arg={0:0}, arg={0:0}, i=8, mutex={1:0}, slot={2:0}] [L1235] 1 p->next = ((void *)0) [L1236] 1 return p; [L1249] RET, EXPR 1 new(3) [L1249] EXPR 1 slot[i] [L1249] CALL 1 list_add(new(3), slot[i]) [L1239] 1 list->next - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1253]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1262]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 99 locations, 52 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 21.0s, OverallIterations: 21, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 12.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3970 SdHoareTripleChecker+Valid, 9.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2891 mSDsluCounter, 1704 SdHoareTripleChecker+Invalid, 7.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1642 mSDsCounter, 145 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11320 IncrementalHoareTripleChecker+Invalid, 11465 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 145 mSolverCounterUnsat, 62 mSDtfsCounter, 11320 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 149 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=450occurred in iteration=20, InterpolantAutomatonStates: 120, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 426 NumberOfCodeBlocks, 426 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 3044 SizeOfPredicates, 0 NumberOfNonLiveVariables, 157 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 890/923 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-26 11:51:46,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07bf23e4-1990-4884-8319-d50a6bdbc02f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)