./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx --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 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:10:12,905 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:10:13,031 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:10:13,037 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:10:13,038 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:10:13,076 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:10:13,078 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:10:13,079 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:10:13,080 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:10:13,085 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:10:13,087 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:10:13,088 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:10:13,088 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:10:13,090 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:10:13,091 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:10:13,091 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:10:13,092 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:10:13,092 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:10:13,093 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:10:13,093 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:10:13,094 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:10:13,095 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:10:13,095 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:10:13,096 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:10:13,096 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:10:13,096 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:10:13,097 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:10:13,098 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:10:13,098 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:10:13,099 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:10:13,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:10:13,101 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:10:13,101 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:10:13,101 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:10:13,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:10:13,102 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:10:13,102 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:10:13,102 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:10:13,103 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:10:13,103 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_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a [2023-11-21 22:10:13,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:10:13,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:10:13,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:10:13,472 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:10:13,473 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:10:13,475 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-11-21 22:10:16,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:10:16,952 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:10:16,953 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-11-21 22:10:16,984 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/data/a5d08eb53/013b9217a3ea4b84895f9a5cbaaf91d5/FLAG39299e236 [2023-11-21 22:10:17,000 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/data/a5d08eb53/013b9217a3ea4b84895f9a5cbaaf91d5 [2023-11-21 22:10:17,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:10:17,005 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:10:17,007 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:10:17,007 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:10:17,013 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:10:17,014 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:17,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f8c890d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17, skipping insertion in model container [2023-11-21 22:10:17,016 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:17,069 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:10:17,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:10:17,710 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:10:17,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:10:17,872 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:10:17,873 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17 WrapperNode [2023-11-21 22:10:17,873 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:10:17,876 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:10:17,876 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:10:17,876 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:10:17,885 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:17,917 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:17,968 INFO L138 Inliner]: procedures = 263, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2023-11-21 22:10:17,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:10:17,970 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:10:17,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:10:17,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:10:17,982 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:17,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:17,997 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:17,998 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:18,011 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:18,025 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:18,027 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:18,040 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:18,043 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:10:18,045 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:10:18,045 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:10:18,045 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:10:18,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17" (1/1) ... [2023-11-21 22:10:18,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:10:18,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:18,087 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:10:18,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:10:18,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:10:18,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:10:18,123 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-21 22:10:18,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:10:18,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:10:18,123 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-21 22:10:18,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:10:18,124 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-21 22:10:18,124 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-21 22:10:18,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:10:18,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:10:18,126 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:10:18,293 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:10:18,295 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:10:18,511 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:10:18,678 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:10:18,680 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 22:10:18,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:10:18 BoogieIcfgContainer [2023-11-21 22:10:18,682 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:10:18,687 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:10:18,687 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:10:18,691 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:10:18,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:10:17" (1/3) ... [2023-11-21 22:10:18,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121d2f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:10:18, skipping insertion in model container [2023-11-21 22:10:18,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:10:17" (2/3) ... [2023-11-21 22:10:18,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121d2f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:10:18, skipping insertion in model container [2023-11-21 22:10:18,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:10:18" (3/3) ... [2023-11-21 22:10:18,697 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_05-funloop_hard2.i [2023-11-21 22:10:18,717 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:10:18,718 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-21 22:10:18,718 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:10:18,790 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:10:18,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 96 flow [2023-11-21 22:10:18,880 INFO L124 PetriNetUnfolderBase]: 3/45 cut-off events. [2023-11-21 22:10:18,881 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:10:18,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 45 events. 3/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 127 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-11-21 22:10:18,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 46 transitions, 96 flow [2023-11-21 22:10:18,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 93 flow [2023-11-21 22:10:18,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:10:18,917 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;@fc025ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:10:18,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-21 22:10:18,921 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:10:18,922 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-21 22:10:18,922 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:10:18,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:18,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:10:18,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:18,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash 279294, now seen corresponding path program 1 times [2023-11-21 22:10:18,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:18,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959649310] [2023-11-21 22:10:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:18,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:19,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:19,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959649310] [2023-11-21 22:10:19,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959649310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:19,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:19,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:10:19,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567876864] [2023-11-21 22:10:19,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:19,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:10:19,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:19,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:10:19,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:10:19,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-21 22:10:19,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:19,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:19,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-21 22:10:19,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:19,424 INFO L124 PetriNetUnfolderBase]: 114/320 cut-off events. [2023-11-21 22:10:19,424 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 22:10:19,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 320 events. 114/320 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1625 event pairs, 91 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 536. Up to 229 conditions per place. [2023-11-21 22:10:19,435 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 25 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-21 22:10:19,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 149 flow [2023-11-21 22:10:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:10:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:10:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-21 22:10:19,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2023-11-21 22:10:19,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-21 22:10:19,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-21 22:10:19,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:19,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-21 22:10:19,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:19,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:19,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:19,460 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 93 flow. Second operand 3 states and 88 transitions. [2023-11-21 22:10:19,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 149 flow [2023-11-21 22:10:19,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:10:19,466 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 104 flow [2023-11-21 22:10:19,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-11-21 22:10:19,475 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-11-21 22:10:19,476 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 104 flow [2023-11-21 22:10:19,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:19,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:19,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-21 22:10:19,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:10:19,477 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:19,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:19,479 INFO L85 PathProgramCache]: Analyzing trace with hash 8657292, now seen corresponding path program 1 times [2023-11-21 22:10:19,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:19,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440009298] [2023-11-21 22:10:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:19,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:19,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:19,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440009298] [2023-11-21 22:10:19,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440009298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576883154] [2023-11-21 22:10:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:19,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:19,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:19,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:19,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:10:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:19,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:10:19,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:19,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:19,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576883154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:19,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:19,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-21 22:10:19,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338556967] [2023-11-21 22:10:19,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:19,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:10:19,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:10:19,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:10:19,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-21 22:10:19,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:19,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:19,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-21 22:10:19,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:20,034 INFO L124 PetriNetUnfolderBase]: 114/323 cut-off events. [2023-11-21 22:10:20,034 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:10:20,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 323 events. 114/323 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1625 event pairs, 91 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 558. Up to 229 conditions per place. [2023-11-21 22:10:20,039 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 25 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-21 22:10:20,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 176 flow [2023-11-21 22:10:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:10:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:10:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2023-11-21 22:10:20,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2023-11-21 22:10:20,042 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 153 transitions. [2023-11-21 22:10:20,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 153 transitions. [2023-11-21 22:10:20,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:20,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 153 transitions. [2023-11-21 22:10:20,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,047 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,047 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 6 states and 153 transitions. [2023-11-21 22:10:20,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 176 flow [2023-11-21 22:10:20,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 172 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-21 22:10:20,051 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 136 flow [2023-11-21 22:10:20,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=136, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-11-21 22:10:20,052 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2023-11-21 22:10:20,052 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 136 flow [2023-11-21 22:10:20,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:20,053 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-21 22:10:20,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 22:10:20,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-21 22:10:20,260 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:20,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash 210531966, now seen corresponding path program 2 times [2023-11-21 22:10:20,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:20,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046576226] [2023-11-21 22:10:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:20,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 22:10:20,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:20,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046576226] [2023-11-21 22:10:20,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046576226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:20,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:20,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:10:20,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444347778] [2023-11-21 22:10:20,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:20,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:10:20,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:10:20,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:10:20,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2023-11-21 22:10:20,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:20,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2023-11-21 22:10:20,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:20,535 INFO L124 PetriNetUnfolderBase]: 114/322 cut-off events. [2023-11-21 22:10:20,536 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:10:20,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 322 events. 114/322 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1627 event pairs, 77 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 549. Up to 195 conditions per place. [2023-11-21 22:10:20,542 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 37 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-11-21 22:10:20,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 56 transitions, 228 flow [2023-11-21 22:10:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:10:20,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:10:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-11-21 22:10:20,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2023-11-21 22:10:20,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-11-21 22:10:20,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-11-21 22:10:20,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:20,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-11-21 22:10:20,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,556 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 136 flow. Second operand 3 states and 90 transitions. [2023-11-21 22:10:20,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 56 transitions, 228 flow [2023-11-21 22:10:20,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 214 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-21 22:10:20,561 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 124 flow [2023-11-21 22:10:20,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-11-21 22:10:20,562 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2023-11-21 22:10:20,562 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 124 flow [2023-11-21 22:10:20,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:20,563 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-21 22:10:20,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:10:20,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:20,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash 210531967, now seen corresponding path program 1 times [2023-11-21 22:10:20,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:20,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415463853] [2023-11-21 22:10:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:20,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:20,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415463853] [2023-11-21 22:10:20,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415463853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:20,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763513162] [2023-11-21 22:10:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:20,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:20,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:20,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:20,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:10:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:20,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:10:20,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:20,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:10:20,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763513162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:20,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:20,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-21 22:10:20,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194289216] [2023-11-21 22:10:20,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:20,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:10:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:20,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:10:20,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:10:20,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-21 22:10:20,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 124 flow. Second operand has 13 states, 13 states have (on average 21.076923076923077) internal successors, (274), 13 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:20,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-21 22:10:20,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:20,984 INFO L124 PetriNetUnfolderBase]: 114/328 cut-off events. [2023-11-21 22:10:20,984 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-21 22:10:20,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 328 events. 114/328 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1630 event pairs, 91 based on Foata normal form. 6/277 useless extension candidates. Maximal degree in co-relation 557. Up to 229 conditions per place. [2023-11-21 22:10:20,988 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 25 selfloop transitions, 11 changer transitions 0/54 dead transitions. [2023-11-21 22:10:20,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 232 flow [2023-11-21 22:10:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:10:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 22:10:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2023-11-21 22:10:20,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2023-11-21 22:10:20,991 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 282 transitions. [2023-11-21 22:10:20,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 282 transitions. [2023-11-21 22:10:20,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:20,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 282 transitions. [2023-11-21 22:10:20,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 23.5) internal successors, (282), 12 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,995 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:20,995 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 124 flow. Second operand 12 states and 282 transitions. [2023-11-21 22:10:20,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 232 flow [2023-11-21 22:10:20,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:10:21,000 INFO L231 Difference]: Finished difference. Result has 70 places, 54 transitions, 204 flow [2023-11-21 22:10:21,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=204, PETRI_PLACES=70, PETRI_TRANSITIONS=54} [2023-11-21 22:10:21,001 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2023-11-21 22:10:21,001 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 54 transitions, 204 flow [2023-11-21 22:10:21,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.076923076923077) internal successors, (274), 13 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:21,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:21,002 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-21 22:10:21,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:21,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:21,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:21,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:21,217 INFO L85 PathProgramCache]: Analyzing trace with hash -222561345, now seen corresponding path program 2 times [2023-11-21 22:10:21,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:21,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460863869] [2023-11-21 22:10:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:21,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:21,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:21,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460863869] [2023-11-21 22:10:21,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460863869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:21,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:21,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:10:21,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57567063] [2023-11-21 22:10:21,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:21,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:10:21,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:21,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:10:21,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:10:21,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2023-11-21 22:10:21,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 54 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:21,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:21,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2023-11-21 22:10:21,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:21,521 INFO L124 PetriNetUnfolderBase]: 114/327 cut-off events. [2023-11-21 22:10:21,521 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-21 22:10:21,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 327 events. 114/327 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1631 event pairs, 77 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 553. Up to 194 conditions per place. [2023-11-21 22:10:21,524 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 42 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-21 22:10:21,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 61 transitions, 306 flow [2023-11-21 22:10:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:10:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:10:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-21 22:10:21,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-21 22:10:21,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-21 22:10:21,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-21 22:10:21,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:21,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-21 22:10:21,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:21,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:21,528 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:21,528 INFO L175 Difference]: Start difference. First operand has 70 places, 54 transitions, 204 flow. Second operand 3 states and 92 transitions. [2023-11-21 22:10:21,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 61 transitions, 306 flow [2023-11-21 22:10:21,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 258 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-21 22:10:21,534 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 158 flow [2023-11-21 22:10:21,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2023-11-21 22:10:21,535 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2023-11-21 22:10:21,535 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 158 flow [2023-11-21 22:10:21,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:21,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:21,536 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:21,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:10:21,537 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:21,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:21,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1756052659, now seen corresponding path program 1 times [2023-11-21 22:10:21,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:21,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417120917] [2023-11-21 22:10:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:21,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:21,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:21,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417120917] [2023-11-21 22:10:21,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417120917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:21,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:21,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:10:21,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912635145] [2023-11-21 22:10:21,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:21,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:10:21,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:21,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:10:21,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:10:22,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2023-11-21 22:10:22,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:22,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:22,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2023-11-21 22:10:22,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:22,502 INFO L124 PetriNetUnfolderBase]: 226/567 cut-off events. [2023-11-21 22:10:22,502 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-21 22:10:22,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 567 events. 226/567 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2860 event pairs, 77 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 1034. Up to 242 conditions per place. [2023-11-21 22:10:22,509 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 77 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2023-11-21 22:10:22,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 434 flow [2023-11-21 22:10:22,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:10:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:10:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2023-11-21 22:10:22,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2023-11-21 22:10:22,511 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 218 transitions. [2023-11-21 22:10:22,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 218 transitions. [2023-11-21 22:10:22,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:22,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 218 transitions. [2023-11-21 22:10:22,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 27.25) internal successors, (218), 8 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:22,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:22,515 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:22,515 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 158 flow. Second operand 8 states and 218 transitions. [2023-11-21 22:10:22,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 434 flow [2023-11-21 22:10:22,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 101 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:10:22,524 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 218 flow [2023-11-21 22:10:22,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=218, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2023-11-21 22:10:22,527 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2023-11-21 22:10:22,527 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 218 flow [2023-11-21 22:10:22,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:22,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:22,528 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:22,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:10:22,529 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:22,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:22,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1756052658, now seen corresponding path program 1 times [2023-11-21 22:10:22,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:22,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991949344] [2023-11-21 22:10:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:22,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:22,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:22,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991949344] [2023-11-21 22:10:22,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991949344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:22,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:22,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:10:22,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673997814] [2023-11-21 22:10:22,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:22,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:10:22,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:10:22,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:10:22,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2023-11-21 22:10:22,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:22,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:22,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2023-11-21 22:10:22,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:23,048 INFO L124 PetriNetUnfolderBase]: 212/537 cut-off events. [2023-11-21 22:10:23,049 INFO L125 PetriNetUnfolderBase]: For 238/238 co-relation queries the response was YES. [2023-11-21 22:10:23,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 537 events. 212/537 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2643 event pairs, 37 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 1212. Up to 240 conditions per place. [2023-11-21 22:10:23,055 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 56 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2023-11-21 22:10:23,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 433 flow [2023-11-21 22:10:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:10:23,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:10:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2023-11-21 22:10:23,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2023-11-21 22:10:23,059 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 153 transitions. [2023-11-21 22:10:23,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 153 transitions. [2023-11-21 22:10:23,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:23,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 153 transitions. [2023-11-21 22:10:23,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:23,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:23,062 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:23,062 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 218 flow. Second operand 6 states and 153 transitions. [2023-11-21 22:10:23,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 433 flow [2023-11-21 22:10:23,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 432 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:10:23,070 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 316 flow [2023-11-21 22:10:23,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2023-11-21 22:10:23,071 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 32 predicate places. [2023-11-21 22:10:23,071 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 316 flow [2023-11-21 22:10:23,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:23,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:23,071 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:23,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:10:23,072 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:23,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:23,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1729905909, now seen corresponding path program 1 times [2023-11-21 22:10:23,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:23,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117732113] [2023-11-21 22:10:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:23,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:23,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:23,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117732113] [2023-11-21 22:10:23,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117732113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:23,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:23,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:10:23,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677468473] [2023-11-21 22:10:23,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:23,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:10:23,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:23,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:10:23,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:10:23,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2023-11-21 22:10:23,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 316 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:23,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:23,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2023-11-21 22:10:23,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:23,533 INFO L124 PetriNetUnfolderBase]: 208/534 cut-off events. [2023-11-21 22:10:23,533 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2023-11-21 22:10:23,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1435 conditions, 534 events. 208/534 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2637 event pairs, 88 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 1375. Up to 198 conditions per place. [2023-11-21 22:10:23,540 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 57 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2023-11-21 22:10:23,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 76 transitions, 518 flow [2023-11-21 22:10:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:10:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:10:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2023-11-21 22:10:23,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173913043478261 [2023-11-21 22:10:23,542 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 119 transitions. [2023-11-21 22:10:23,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 119 transitions. [2023-11-21 22:10:23,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:23,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 119 transitions. [2023-11-21 22:10:23,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:23,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:23,544 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:23,545 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 316 flow. Second operand 5 states and 119 transitions. [2023-11-21 22:10:23,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 76 transitions, 518 flow [2023-11-21 22:10:23,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 517 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:10:23,555 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 327 flow [2023-11-21 22:10:23,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=327, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2023-11-21 22:10:23,559 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2023-11-21 22:10:23,559 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 327 flow [2023-11-21 22:10:23,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:23,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:23,559 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:23,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:10:23,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:23,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1729905910, now seen corresponding path program 1 times [2023-11-21 22:10:23,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:23,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147701658] [2023-11-21 22:10:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:23,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:23,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:23,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147701658] [2023-11-21 22:10:23,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147701658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:23,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:23,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:10:23,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377710934] [2023-11-21 22:10:23,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:23,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:10:23,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:23,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:10:23,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:10:23,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2023-11-21 22:10:23,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:23,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:23,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2023-11-21 22:10:23,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:24,273 INFO L124 PetriNetUnfolderBase]: 320/737 cut-off events. [2023-11-21 22:10:24,274 INFO L125 PetriNetUnfolderBase]: For 1027/1027 co-relation queries the response was YES. [2023-11-21 22:10:24,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2082 conditions, 737 events. 320/737 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3475 event pairs, 158 based on Foata normal form. 14/723 useless extension candidates. Maximal degree in co-relation 2021. Up to 394 conditions per place. [2023-11-21 22:10:24,282 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 74 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2023-11-21 22:10:24,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 92 transitions, 643 flow [2023-11-21 22:10:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:10:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:10:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2023-11-21 22:10:24,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5688405797101449 [2023-11-21 22:10:24,285 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 157 transitions. [2023-11-21 22:10:24,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 157 transitions. [2023-11-21 22:10:24,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:24,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 157 transitions. [2023-11-21 22:10:24,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:24,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:24,289 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:24,289 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 327 flow. Second operand 6 states and 157 transitions. [2023-11-21 22:10:24,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 92 transitions, 643 flow [2023-11-21 22:10:24,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 92 transitions, 623 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:10:24,298 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 347 flow [2023-11-21 22:10:24,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2023-11-21 22:10:24,300 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 36 predicate places. [2023-11-21 22:10:24,300 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 347 flow [2023-11-21 22:10:24,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:24,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:24,301 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:24,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:10:24,301 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:24,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1093524864, now seen corresponding path program 1 times [2023-11-21 22:10:24,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:24,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552213565] [2023-11-21 22:10:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:24,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:24,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:24,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552213565] [2023-11-21 22:10:24,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552213565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:24,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378994368] [2023-11-21 22:10:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:24,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:24,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:24,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:24,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:10:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:24,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 22:10:24,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:25,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:10:25,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:10:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:25,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:25,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378994368] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:25,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:25,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2023-11-21 22:10:25,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700804805] [2023-11-21 22:10:25,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:25,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-21 22:10:25,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:25,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-21 22:10:25,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:10:26,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2023-11-21 22:10:26,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 347 flow. Second operand has 20 states, 20 states have (on average 18.15) internal successors, (363), 20 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:26,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:26,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2023-11-21 22:10:26,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:27,679 INFO L124 PetriNetUnfolderBase]: 688/1567 cut-off events. [2023-11-21 22:10:27,679 INFO L125 PetriNetUnfolderBase]: For 2085/2089 co-relation queries the response was YES. [2023-11-21 22:10:27,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1567 events. 688/1567 cut-off events. For 2085/2089 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7983 event pairs, 83 based on Foata normal form. 214/1748 useless extension candidates. Maximal degree in co-relation 4474. Up to 232 conditions per place. [2023-11-21 22:10:27,697 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 215 selfloop transitions, 41 changer transitions 0/265 dead transitions. [2023-11-21 22:10:27,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 265 transitions, 1640 flow [2023-11-21 22:10:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 22:10:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-21 22:10:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 582 transitions. [2023-11-21 22:10:27,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575098814229249 [2023-11-21 22:10:27,701 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 582 transitions. [2023-11-21 22:10:27,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 582 transitions. [2023-11-21 22:10:27,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:27,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 582 transitions. [2023-11-21 22:10:27,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 26.454545454545453) internal successors, (582), 22 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:27,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 46.0) internal successors, (1058), 23 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:27,707 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 46.0) internal successors, (1058), 23 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:27,707 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 347 flow. Second operand 22 states and 582 transitions. [2023-11-21 22:10:27,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 265 transitions, 1640 flow [2023-11-21 22:10:27,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 265 transitions, 1594 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:10:27,724 INFO L231 Difference]: Finished difference. Result has 113 places, 87 transitions, 708 flow [2023-11-21 22:10:27,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=708, PETRI_PLACES=113, PETRI_TRANSITIONS=87} [2023-11-21 22:10:27,726 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 67 predicate places. [2023-11-21 22:10:27,726 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 87 transitions, 708 flow [2023-11-21 22:10:27,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.15) internal successors, (363), 20 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:27,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:27,726 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:27,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:27,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:27,946 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:27,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash -657382973, now seen corresponding path program 1 times [2023-11-21 22:10:27,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:27,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857238222] [2023-11-21 22:10:27,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:27,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:28,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:28,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857238222] [2023-11-21 22:10:28,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857238222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:28,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326813256] [2023-11-21 22:10:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:28,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:28,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:28,375 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:28,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:10:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:28,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 22:10:28,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:28,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:10:28,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:10:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:28,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:29,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326813256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:29,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:29,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2023-11-21 22:10:29,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008764265] [2023-11-21 22:10:29,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:29,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-21 22:10:29,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-21 22:10:29,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:10:29,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2023-11-21 22:10:29,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 87 transitions, 708 flow. Second operand has 20 states, 20 states have (on average 18.15) internal successors, (363), 20 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:29,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:29,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2023-11-21 22:10:29,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:31,066 INFO L124 PetriNetUnfolderBase]: 1275/2844 cut-off events. [2023-11-21 22:10:31,066 INFO L125 PetriNetUnfolderBase]: For 9786/9786 co-relation queries the response was YES. [2023-11-21 22:10:31,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 2844 events. 1275/2844 cut-off events. For 9786/9786 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 15771 event pairs, 271 based on Foata normal form. 224/3036 useless extension candidates. Maximal degree in co-relation 9378. Up to 642 conditions per place. [2023-11-21 22:10:31,105 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 234 selfloop transitions, 24 changer transitions 0/266 dead transitions. [2023-11-21 22:10:31,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 266 transitions, 2858 flow [2023-11-21 22:10:31,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 22:10:31,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-21 22:10:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 349 transitions. [2023-11-21 22:10:31,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836120401337793 [2023-11-21 22:10:31,107 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 349 transitions. [2023-11-21 22:10:31,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 349 transitions. [2023-11-21 22:10:31,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:31,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 349 transitions. [2023-11-21 22:10:31,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 26.846153846153847) internal successors, (349), 13 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:31,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:31,111 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:31,112 INFO L175 Difference]: Start difference. First operand has 113 places, 87 transitions, 708 flow. Second operand 13 states and 349 transitions. [2023-11-21 22:10:31,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 266 transitions, 2858 flow [2023-11-21 22:10:31,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 266 transitions, 2420 flow, removed 172 selfloop flow, removed 7 redundant places. [2023-11-21 22:10:31,146 INFO L231 Difference]: Finished difference. Result has 124 places, 93 transitions, 708 flow [2023-11-21 22:10:31,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=708, PETRI_PLACES=124, PETRI_TRANSITIONS=93} [2023-11-21 22:10:31,147 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 78 predicate places. [2023-11-21 22:10:31,147 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 93 transitions, 708 flow [2023-11-21 22:10:31,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.15) internal successors, (363), 20 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:31,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:31,148 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:31,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:31,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:31,364 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:31,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1012839283, now seen corresponding path program 2 times [2023-11-21 22:10:31,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:31,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332494210] [2023-11-21 22:10:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:31,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:32,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:32,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332494210] [2023-11-21 22:10:32,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332494210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:32,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087609113] [2023-11-21 22:10:32,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:10:32,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:32,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:32,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:32,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:10:32,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:10:32,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:10:32,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 22:10:32,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:32,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:10:32,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:10:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:33,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:33,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087609113] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:33,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:33,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 29 [2023-11-21 22:10:33,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369744251] [2023-11-21 22:10:33,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:33,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-21 22:10:33,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:33,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-21 22:10:33,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2023-11-21 22:10:34,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2023-11-21 22:10:34,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 93 transitions, 708 flow. Second operand has 31 states, 31 states have (on average 19.129032258064516) internal successors, (593), 31 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:34,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:34,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2023-11-21 22:10:34,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:37,699 INFO L124 PetriNetUnfolderBase]: 1476/3278 cut-off events. [2023-11-21 22:10:37,699 INFO L125 PetriNetUnfolderBase]: For 10567/10572 co-relation queries the response was YES. [2023-11-21 22:10:37,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11033 conditions, 3278 events. 1476/3278 cut-off events. For 10567/10572 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 18546 event pairs, 18 based on Foata normal form. 118/3396 useless extension candidates. Maximal degree in co-relation 10949. Up to 422 conditions per place. [2023-11-21 22:10:37,747 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 353 selfloop transitions, 49 changer transitions 7/417 dead transitions. [2023-11-21 22:10:37,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 417 transitions, 3256 flow [2023-11-21 22:10:37,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-21 22:10:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-21 22:10:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 716 transitions. [2023-11-21 22:10:37,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559006211180124 [2023-11-21 22:10:37,752 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 716 transitions. [2023-11-21 22:10:37,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 716 transitions. [2023-11-21 22:10:37,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:37,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 716 transitions. [2023-11-21 22:10:37,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 25.571428571428573) internal successors, (716), 28 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:37,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 46.0) internal successors, (1334), 29 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:37,760 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 46.0) internal successors, (1334), 29 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:37,760 INFO L175 Difference]: Start difference. First operand has 124 places, 93 transitions, 708 flow. Second operand 28 states and 716 transitions. [2023-11-21 22:10:37,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 417 transitions, 3256 flow [2023-11-21 22:10:37,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 417 transitions, 2976 flow, removed 91 selfloop flow, removed 12 redundant places. [2023-11-21 22:10:37,826 INFO L231 Difference]: Finished difference. Result has 140 places, 101 transitions, 830 flow [2023-11-21 22:10:37,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=830, PETRI_PLACES=140, PETRI_TRANSITIONS=101} [2023-11-21 22:10:37,828 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 94 predicate places. [2023-11-21 22:10:37,828 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 101 transitions, 830 flow [2023-11-21 22:10:37,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 19.129032258064516) internal successors, (593), 31 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:37,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:37,829 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:37,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-21 22:10:38,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 22:10:38,049 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:38,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:38,050 INFO L85 PathProgramCache]: Analyzing trace with hash 2105064374, now seen corresponding path program 2 times [2023-11-21 22:10:38,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:38,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561681533] [2023-11-21 22:10:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:38,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:38,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:38,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561681533] [2023-11-21 22:10:38,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561681533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:38,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535931737] [2023-11-21 22:10:38,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:10:38,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:38,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:38,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:38,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:10:38,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:10:38,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:10:38,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 22:10:38,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:39,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:10:39,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:10:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:39,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:40,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535931737] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:40,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:40,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 29 [2023-11-21 22:10:40,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752050046] [2023-11-21 22:10:40,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:40,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-21 22:10:40,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:40,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-21 22:10:40,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2023-11-21 22:10:41,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2023-11-21 22:10:41,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 101 transitions, 830 flow. Second operand has 31 states, 31 states have (on average 19.129032258064516) internal successors, (593), 31 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:41,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:41,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2023-11-21 22:10:41,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:43,675 INFO L124 PetriNetUnfolderBase]: 1704/3777 cut-off events. [2023-11-21 22:10:43,676 INFO L125 PetriNetUnfolderBase]: For 12889/12889 co-relation queries the response was YES. [2023-11-21 22:10:43,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12784 conditions, 3777 events. 1704/3777 cut-off events. For 12889/12889 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 21670 event pairs, 0 based on Foata normal form. 114/3891 useless extension candidates. Maximal degree in co-relation 12706. Up to 494 conditions per place. [2023-11-21 22:10:43,734 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 317 selfloop transitions, 31 changer transitions 27/382 dead transitions. [2023-11-21 22:10:43,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 382 transitions, 4085 flow [2023-11-21 22:10:43,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 22:10:43,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-21 22:10:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 443 transitions. [2023-11-21 22:10:43,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664961636828645 [2023-11-21 22:10:43,739 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 443 transitions. [2023-11-21 22:10:43,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 443 transitions. [2023-11-21 22:10:43,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:43,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 443 transitions. [2023-11-21 22:10:43,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 26.058823529411764) internal successors, (443), 17 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:43,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 46.0) internal successors, (828), 18 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:43,748 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 46.0) internal successors, (828), 18 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:43,748 INFO L175 Difference]: Start difference. First operand has 140 places, 101 transitions, 830 flow. Second operand 17 states and 443 transitions. [2023-11-21 22:10:43,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 382 transitions, 4085 flow [2023-11-21 22:10:43,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 382 transitions, 3358 flow, removed 60 selfloop flow, removed 23 redundant places. [2023-11-21 22:10:43,785 INFO L231 Difference]: Finished difference. Result has 133 places, 102 transitions, 777 flow [2023-11-21 22:10:43,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=777, PETRI_PLACES=133, PETRI_TRANSITIONS=102} [2023-11-21 22:10:43,787 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 87 predicate places. [2023-11-21 22:10:43,787 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 102 transitions, 777 flow [2023-11-21 22:10:43,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 19.129032258064516) internal successors, (593), 31 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:43,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:43,788 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:43,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:44,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:44,013 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:44,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash 864078276, now seen corresponding path program 1 times [2023-11-21 22:10:44,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:44,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084546886] [2023-11-21 22:10:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:44,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:44,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:44,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084546886] [2023-11-21 22:10:44,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084546886] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:44,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71949998] [2023-11-21 22:10:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:44,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:44,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:44,204 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:44,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:10:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:44,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 22:10:44,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:44,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:10:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 22:10:44,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71949998] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:10:44,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:10:44,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-11-21 22:10:44,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273399365] [2023-11-21 22:10:44,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:10:44,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:10:44,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:44,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:10:44,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:10:44,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-21 22:10:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 102 transitions, 777 flow. Second operand has 13 states, 13 states have (on average 25.692307692307693) internal successors, (334), 13 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) [2023-11-21 22:10:44,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:44,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-21 22:10:44,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:46,011 INFO L124 PetriNetUnfolderBase]: 2654/5819 cut-off events. [2023-11-21 22:10:46,011 INFO L125 PetriNetUnfolderBase]: For 15024/15024 co-relation queries the response was YES. [2023-11-21 22:10:46,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18914 conditions, 5819 events. 2654/5819 cut-off events. For 15024/15024 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 33213 event pairs, 352 based on Foata normal form. 190/6009 useless extension candidates. Maximal degree in co-relation 18838. Up to 751 conditions per place. [2023-11-21 22:10:46,090 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 317 selfloop transitions, 12 changer transitions 0/336 dead transitions. [2023-11-21 22:10:46,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 336 transitions, 2904 flow [2023-11-21 22:10:46,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:10:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 22:10:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 406 transitions. [2023-11-21 22:10:46,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7355072463768116 [2023-11-21 22:10:46,092 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 406 transitions. [2023-11-21 22:10:46,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 406 transitions. [2023-11-21 22:10:46,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:46,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 406 transitions. [2023-11-21 22:10:46,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 33.833333333333336) internal successors, (406), 12 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:46,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:46,095 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:46,095 INFO L175 Difference]: Start difference. First operand has 133 places, 102 transitions, 777 flow. Second operand 12 states and 406 transitions. [2023-11-21 22:10:46,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 336 transitions, 2904 flow [2023-11-21 22:10:46,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 336 transitions, 2850 flow, removed 8 selfloop flow, removed 12 redundant places. [2023-11-21 22:10:46,143 INFO L231 Difference]: Finished difference. Result has 138 places, 107 transitions, 817 flow [2023-11-21 22:10:46,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=817, PETRI_PLACES=138, PETRI_TRANSITIONS=107} [2023-11-21 22:10:46,144 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 92 predicate places. [2023-11-21 22:10:46,145 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 107 transitions, 817 flow [2023-11-21 22:10:46,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.692307692307693) internal successors, (334), 13 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) [2023-11-21 22:10:46,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:46,145 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:46,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:46,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 22:10:46,368 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:46,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:46,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1004599063, now seen corresponding path program 2 times [2023-11-21 22:10:46,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:46,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788555745] [2023-11-21 22:10:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:46,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2023-11-21 22:10:46,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:46,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788555745] [2023-11-21 22:10:46,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788555745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:46,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:10:46,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:10:46,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214419835] [2023-11-21 22:10:46,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:46,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:10:46,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:46,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:10:46,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:10:46,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2023-11-21 22:10:46,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 107 transitions, 817 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:46,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:46,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2023-11-21 22:10:46,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:48,439 INFO L124 PetriNetUnfolderBase]: 2654/5796 cut-off events. [2023-11-21 22:10:48,439 INFO L125 PetriNetUnfolderBase]: For 14925/14925 co-relation queries the response was YES. [2023-11-21 22:10:48,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19282 conditions, 5796 events. 2654/5796 cut-off events. For 14925/14925 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 34200 event pairs, 2472 based on Foata normal form. 0/5795 useless extension candidates. Maximal degree in co-relation 19202. Up to 5094 conditions per place. [2023-11-21 22:10:48,511 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 60 selfloop transitions, 10 changer transitions 35/111 dead transitions. [2023-11-21 22:10:48,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 111 transitions, 1063 flow [2023-11-21 22:10:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:10:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:10:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2023-11-21 22:10:48,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6032608695652174 [2023-11-21 22:10:48,513 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2023-11-21 22:10:48,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2023-11-21 22:10:48,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:48,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2023-11-21 22:10:48,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:48,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:48,515 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:48,515 INFO L175 Difference]: Start difference. First operand has 138 places, 107 transitions, 817 flow. Second operand 4 states and 111 transitions. [2023-11-21 22:10:48,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 111 transitions, 1063 flow [2023-11-21 22:10:48,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 111 transitions, 1053 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-21 22:10:48,581 INFO L231 Difference]: Finished difference. Result has 135 places, 75 transitions, 516 flow [2023-11-21 22:10:48,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=516, PETRI_PLACES=135, PETRI_TRANSITIONS=75} [2023-11-21 22:10:48,582 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 89 predicate places. [2023-11-21 22:10:48,583 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 75 transitions, 516 flow [2023-11-21 22:10:48,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:48,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:48,583 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:48,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 22:10:48,584 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:48,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1532044101, now seen corresponding path program 1 times [2023-11-21 22:10:48,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:48,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266719398] [2023-11-21 22:10:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:48,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-11-21 22:10:49,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:49,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266719398] [2023-11-21 22:10:49,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266719398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:49,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72072381] [2023-11-21 22:10:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:49,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:49,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:49,133 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:49,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:10:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:49,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:10:49,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:49,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:10:49,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:10:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-11-21 22:10:49,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:10:49,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72072381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:49,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:10:49,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-11-21 22:10:49,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762481011] [2023-11-21 22:10:49,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:49,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:10:49,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:49,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:10:49,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:10:50,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2023-11-21 22:10:50,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 75 transitions, 516 flow. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:50,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:50,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2023-11-21 22:10:50,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:51,562 INFO L124 PetriNetUnfolderBase]: 2547/5636 cut-off events. [2023-11-21 22:10:51,562 INFO L125 PetriNetUnfolderBase]: For 12388/12388 co-relation queries the response was YES. [2023-11-21 22:10:51,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17852 conditions, 5636 events. 2547/5636 cut-off events. For 12388/12388 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 34098 event pairs, 402 based on Foata normal form. 24/5660 useless extension candidates. Maximal degree in co-relation 17811. Up to 2496 conditions per place. [2023-11-21 22:10:51,614 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 104 selfloop transitions, 24 changer transitions 11/143 dead transitions. [2023-11-21 22:10:51,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 143 transitions, 1255 flow [2023-11-21 22:10:51,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:10:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:10:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2023-11-21 22:10:51,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745341614906833 [2023-11-21 22:10:51,616 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 185 transitions. [2023-11-21 22:10:51,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 185 transitions. [2023-11-21 22:10:51,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:51,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 185 transitions. [2023-11-21 22:10:51,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:51,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:51,619 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:51,619 INFO L175 Difference]: Start difference. First operand has 135 places, 75 transitions, 516 flow. Second operand 7 states and 185 transitions. [2023-11-21 22:10:51,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 143 transitions, 1255 flow [2023-11-21 22:10:51,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 143 transitions, 1158 flow, removed 5 selfloop flow, removed 16 redundant places. [2023-11-21 22:10:51,658 INFO L231 Difference]: Finished difference. Result has 118 places, 76 transitions, 504 flow [2023-11-21 22:10:51,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=118, PETRI_TRANSITIONS=76} [2023-11-21 22:10:51,659 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 72 predicate places. [2023-11-21 22:10:51,660 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 76 transitions, 504 flow [2023-11-21 22:10:51,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:51,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:10:51,660 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:10:51,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-21 22:10:51,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 22:10:51,877 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:10:51,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:10:51,877 INFO L85 PathProgramCache]: Analyzing trace with hash -590474817, now seen corresponding path program 2 times [2023-11-21 22:10:51,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:10:51,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216538042] [2023-11-21 22:10:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:10:51,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:10:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:10:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-11-21 22:10:52,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:10:52,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216538042] [2023-11-21 22:10:52,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216538042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:10:52,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660364564] [2023-11-21 22:10:52,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:10:52,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:10:52,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:10:52,443 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:10:52,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:10:52,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-21 22:10:52,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:10:52,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:10:52,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:10:53,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:10:53,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:10:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2023-11-21 22:10:53,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:10:53,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660364564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:10:53,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:10:53,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-11-21 22:10:53,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150036773] [2023-11-21 22:10:53,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:10:53,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:10:53,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:10:53,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:10:53,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:10:53,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2023-11-21 22:10:53,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 76 transitions, 504 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:53,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:10:53,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2023-11-21 22:10:53,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:10:54,519 INFO L124 PetriNetUnfolderBase]: 2565/5637 cut-off events. [2023-11-21 22:10:54,520 INFO L125 PetriNetUnfolderBase]: For 11350/11350 co-relation queries the response was YES. [2023-11-21 22:10:54,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18309 conditions, 5637 events. 2565/5637 cut-off events. For 11350/11350 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 33249 event pairs, 2280 based on Foata normal form. 12/5648 useless extension candidates. Maximal degree in co-relation 18274. Up to 4738 conditions per place. [2023-11-21 22:10:54,551 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 0 selfloop transitions, 0 changer transitions 107/107 dead transitions. [2023-11-21 22:10:54,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 107 transitions, 894 flow [2023-11-21 22:10:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:10:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:10:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2023-11-21 22:10:54,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4751552795031056 [2023-11-21 22:10:54,553 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 153 transitions. [2023-11-21 22:10:54,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 153 transitions. [2023-11-21 22:10:54,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:10:54,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 153 transitions. [2023-11-21 22:10:54,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:54,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:54,556 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:54,556 INFO L175 Difference]: Start difference. First operand has 118 places, 76 transitions, 504 flow. Second operand 7 states and 153 transitions. [2023-11-21 22:10:54,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 107 transitions, 894 flow [2023-11-21 22:10:54,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 107 transitions, 784 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-21 22:10:54,588 INFO L231 Difference]: Finished difference. Result has 116 places, 0 transitions, 0 flow [2023-11-21 22:10:54,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=116, PETRI_TRANSITIONS=0} [2023-11-21 22:10:54,589 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 70 predicate places. [2023-11-21 22:10:54,590 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 0 transitions, 0 flow [2023-11-21 22:10:54,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:10:54,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 20 remaining) [2023-11-21 22:10:54,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2023-11-21 22:10:54,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2023-11-21 22:10:54,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2023-11-21 22:10:54,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2023-11-21 22:10:54,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2023-11-21 22:10:54,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2023-11-21 22:10:54,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2023-11-21 22:10:54,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2023-11-21 22:10:54,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2023-11-21 22:10:54,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (9 of 20 remaining) [2023-11-21 22:10:54,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 20 remaining) [2023-11-21 22:10:54,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2023-11-21 22:10:54,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2023-11-21 22:10:54,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2023-11-21 22:10:54,597 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2023-11-21 22:10:54,597 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2023-11-21 22:10:54,597 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 20 remaining) [2023-11-21 22:10:54,597 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 20 remaining) [2023-11-21 22:10:54,598 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 20 remaining) [2023-11-21 22:10:54,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:10:54,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 22:10:54,808 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-21 22:10:54,814 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-21 22:10:54,814 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 22:10:54,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 10:10:54 BasicIcfg [2023-11-21 22:10:54,824 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 22:10:54,824 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 22:10:54,824 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 22:10:54,825 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 22:10:54,826 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:10:18" (3/4) ... [2023-11-21 22:10:54,827 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-21 22:10:54,831 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-11-21 22:10:54,838 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2023-11-21 22:10:54,838 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2023-11-21 22:10:54,838 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-21 22:10:54,935 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/witness.graphml [2023-11-21 22:10:54,936 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/witness.yml [2023-11-21 22:10:54,936 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 22:10:54,937 INFO L158 Benchmark]: Toolchain (without parser) took 37932.38ms. Allocated memory was 211.8MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 170.8MB in the beginning and 1.7GB in the end (delta: -1.5GB). Peak memory consumption was 359.3MB. Max. memory is 16.1GB. [2023-11-21 22:10:54,938 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 138.4MB. Free memory is still 80.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:10:54,939 INFO L158 Benchmark]: CACSL2BoogieTranslator took 867.67ms. Allocated memory is still 211.8MB. Free memory was 170.6MB in the beginning and 142.5MB in the end (delta: 28.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2023-11-21 22:10:54,939 INFO L158 Benchmark]: Boogie Procedure Inliner took 93.58ms. Allocated memory is still 211.8MB. Free memory was 142.5MB in the beginning and 139.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:10:54,940 INFO L158 Benchmark]: Boogie Preprocessor took 74.07ms. Allocated memory is still 211.8MB. Free memory was 139.8MB in the beginning and 138.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:10:54,940 INFO L158 Benchmark]: RCFGBuilder took 637.87ms. Allocated memory is still 211.8MB. Free memory was 138.3MB in the beginning and 179.6MB in the end (delta: -41.3MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. [2023-11-21 22:10:54,941 INFO L158 Benchmark]: TraceAbstraction took 36137.04ms. Allocated memory was 211.8MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 179.0MB in the beginning and 1.7GB in the end (delta: -1.5GB). Peak memory consumption was 386.3MB. Max. memory is 16.1GB. [2023-11-21 22:10:54,941 INFO L158 Benchmark]: Witness Printer took 112.36ms. Allocated memory is still 2.1GB. Free memory was 1.7GB in the beginning and 1.7GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-21 22:10:54,943 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 138.4MB. Free memory is still 80.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 867.67ms. Allocated memory is still 211.8MB. Free memory was 170.6MB in the beginning and 142.5MB in the end (delta: 28.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 93.58ms. Allocated memory is still 211.8MB. Free memory was 142.5MB in the beginning and 139.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.07ms. Allocated memory is still 211.8MB. Free memory was 139.8MB in the beginning and 138.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 637.87ms. Allocated memory is still 211.8MB. Free memory was 138.3MB in the beginning and 179.6MB in the end (delta: -41.3MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. * TraceAbstraction took 36137.04ms. Allocated memory was 211.8MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 179.0MB in the beginning and 1.7GB in the end (delta: -1.5GB). Peak memory consumption was 386.3MB. Max. memory is 16.1GB. * Witness Printer took 112.36ms. Allocated memory is still 2.1GB. Free memory was 1.7GB in the beginning and 1.7GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 931]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 58 locations, 20 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: 36.0s, OverallIterations: 17, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 20.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4660 SdHoareTripleChecker+Valid, 7.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4388 mSDsluCounter, 1297 SdHoareTripleChecker+Invalid, 6.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1235 mSDsCounter, 91 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10626 IncrementalHoareTripleChecker+Invalid, 10717 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 91 mSolverCounterUnsat, 62 mSDtfsCounter, 10626 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 797 GetRequests, 541 SyntacticMatches, 2 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=830occurred in iteration=12, InterpolantAutomatonStates: 162, 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: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 1010 NumberOfCodeBlocks, 930 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1192 ConstructedInterpolants, 44 QuantifiedInterpolants, 12641 SizeOfPredicates, 38 NumberOfNonLiveVariables, 2194 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 33 InterpolantComputations, 10 PerfectInterpolantSequences, 3076/3640 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 - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-21 22:10:54,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f22bc6-4151-4b45-a31a-9bf2ad60bb75/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE