./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/06-symbeq_08-tricky_address3.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_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/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_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/06-symbeq_08-tricky_address3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/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_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/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 a812aad62102b8bb20af57f89ce6dbf7fb9ee1fa63f6f8ecf164ccf61d0713cb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:28:24,462 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:28:24,572 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:28:24,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:28:24,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:28:24,600 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:28:24,601 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:28:24,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:28:24,602 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:28:24,603 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:28:24,604 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:28:24,605 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:28:24,605 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:28:24,606 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:28:24,607 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:28:24,607 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:28:24,608 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:28:24,609 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:28:24,609 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:28:24,610 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:28:24,610 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:28:24,611 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:28:24,612 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:28:24,612 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:28:24,613 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:28:24,613 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:28:24,614 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:28:24,615 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:28:24,615 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:28:24,615 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:28:24,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:28:24,617 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:28:24,617 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:28:24,617 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:28:24,618 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:28:24,618 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:28:24,619 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:28:24,619 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:28:24,620 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:28:24,620 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_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a812aad62102b8bb20af57f89ce6dbf7fb9ee1fa63f6f8ecf164ccf61d0713cb [2023-11-21 22:28:24,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:28:24,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:28:24,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:28:24,931 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:28:24,931 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:28:24,932 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/goblint-regression/06-symbeq_08-tricky_address3.i [2023-11-21 22:28:28,183 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:28:28,555 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:28:28,555 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/sv-benchmarks/c/goblint-regression/06-symbeq_08-tricky_address3.i [2023-11-21 22:28:28,574 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/data/432c6c6be/02ff36395eda4737ab6fec6b1cb4c078/FLAGb4fd18e31 [2023-11-21 22:28:28,590 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/data/432c6c6be/02ff36395eda4737ab6fec6b1cb4c078 [2023-11-21 22:28:28,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:28:28,600 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:28:28,603 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:28:28,603 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:28:28,609 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:28:28,610 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:28:28" (1/1) ... [2023-11-21 22:28:28,611 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c51445c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:28, skipping insertion in model container [2023-11-21 22:28:28,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:28:28" (1/1) ... [2023-11-21 22:28:28,684 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:28:29,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:28:29,215 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:28:29,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:28:29,378 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:28:29,378 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29 WrapperNode [2023-11-21 22:28:29,379 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:28:29,380 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:28:29,380 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:28:29,380 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:28:29,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29" (1/1) ... [2023-11-21 22:28:29,407 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29" (1/1) ... [2023-11-21 22:28:29,433 INFO L138 Inliner]: procedures = 265, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-11-21 22:28:29,433 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:28:29,434 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:28:29,434 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:28:29,435 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:28:29,445 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29" (1/1) ... [2023-11-21 22:28:29,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29" (1/1) ... [2023-11-21 22:28:29,449 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29" (1/1) ... [2023-11-21 22:28:29,449 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29" (1/1) ... [2023-11-21 22:28:29,470 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29" (1/1) ... [2023-11-21 22:28:29,474 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29" (1/1) ... [2023-11-21 22:28:29,476 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29" (1/1) ... [2023-11-21 22:28:29,496 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29" (1/1) ... [2023-11-21 22:28:29,500 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:28:29,501 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:28:29,501 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:28:29,501 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:28:29,502 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29" (1/1) ... [2023-11-21 22:28:29,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:28:29,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:28:29,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:28:29,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:28:29,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:28:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:28:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-21 22:28:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:28:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:28:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-21 22:28:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:28:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-21 22:28:29,595 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-21 22:28:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:28:29,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:28:29,597 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 22:28:29,737 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:28:29,739 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:28:29,934 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:28:30,133 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:28:30,134 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 22:28:30,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:28:30 BoogieIcfgContainer [2023-11-21 22:28:30,135 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:28:30,138 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:28:30,138 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:28:30,141 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:28:30,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:28:28" (1/3) ... [2023-11-21 22:28:30,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3271f63e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:28:30, skipping insertion in model container [2023-11-21 22:28:30,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:29" (2/3) ... [2023-11-21 22:28:30,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3271f63e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:28:30, skipping insertion in model container [2023-11-21 22:28:30,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:28:30" (3/3) ... [2023-11-21 22:28:30,145 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_08-tricky_address3.i [2023-11-21 22:28:30,163 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:28:30,163 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-21 22:28:30,163 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:28:30,233 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:28:30,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 32 transitions, 68 flow [2023-11-21 22:28:30,321 INFO L124 PetriNetUnfolderBase]: 1/31 cut-off events. [2023-11-21 22:28:30,321 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:28:30,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 31 events. 1/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 55 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 6. Up to 2 conditions per place. [2023-11-21 22:28:30,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 32 transitions, 68 flow [2023-11-21 22:28:30,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 31 transitions, 65 flow [2023-11-21 22:28:30,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:28:30,364 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;@3025555d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:28:30,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-21 22:28:30,375 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:28:30,375 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-21 22:28:30,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:28:30,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:30,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:28:30,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-21 22:28:30,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:30,382 INFO L85 PathProgramCache]: Analyzing trace with hash 237056, now seen corresponding path program 1 times [2023-11-21 22:28:30,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:30,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521865352] [2023-11-21 22:28:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:30,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:28:30,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:30,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521865352] [2023-11-21 22:28:30,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521865352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:30,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:30,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:28:30,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386131342] [2023-11-21 22:28:30,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:30,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:28:30,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:30,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:28:30,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:28:30,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 32 [2023-11-21 22:28:30,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 22:28:30,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:30,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 32 [2023-11-21 22:28:30,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:30,816 INFO L124 PetriNetUnfolderBase]: 50/153 cut-off events. [2023-11-21 22:28:30,817 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 22:28:30,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 153 events. 50/153 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 567 event pairs, 49 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 257. Up to 117 conditions per place. [2023-11-21 22:28:30,823 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 17 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-11-21 22:28:30,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 105 flow [2023-11-21 22:28:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:28:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:28:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2023-11-21 22:28:30,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2023-11-21 22:28:30,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2023-11-21 22:28:30,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2023-11-21 22:28:30,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:30,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2023-11-21 22:28:30,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 22:28:30,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 22:28:30,845 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 22:28:30,847 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 65 flow. Second operand 3 states and 62 transitions. [2023-11-21 22:28:30,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 105 flow [2023-11-21 22:28:30,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:28:30,853 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 76 flow [2023-11-21 22:28:30,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-21 22:28:30,859 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-11-21 22:28:30,859 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 76 flow [2023-11-21 22:28:30,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 22:28:30,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:30,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-21 22:28:30,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:28:30,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-21 22:28:30,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:30,861 INFO L85 PathProgramCache]: Analyzing trace with hash 7347495, now seen corresponding path program 1 times [2023-11-21 22:28:30,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:30,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80567639] [2023-11-21 22:28:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:30,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:30,943 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 22:28:30,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:30,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80567639] [2023-11-21 22:28:30,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80567639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:28:30,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346884310] [2023-11-21 22:28:30,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:30,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:28:30,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:28:30,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:28:30,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:28:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:31,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:28:31,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:28:31,084 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 22:28:31,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:28:31,125 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 22:28:31,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346884310] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:28:31,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:28:31,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-21 22:28:31,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113831889] [2023-11-21 22:28:31,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:28:31,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:28:31,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:31,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:28:31,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:28:31,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 32 [2023-11-21 22:28:31,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 22:28:31,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:31,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 32 [2023-11-21 22:28:31,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:31,273 INFO L124 PetriNetUnfolderBase]: 50/156 cut-off events. [2023-11-21 22:28:31,274 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:28:31,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 156 events. 50/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 567 event pairs, 49 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 279. Up to 117 conditions per place. [2023-11-21 22:28:31,280 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 17 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-11-21 22:28:31,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 132 flow [2023-11-21 22:28:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:28:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:28:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2023-11-21 22:28:31,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677083333333334 [2023-11-21 22:28:31,286 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 109 transitions. [2023-11-21 22:28:31,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 109 transitions. [2023-11-21 22:28:31,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:31,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 109 transitions. [2023-11-21 22:28:31,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 22:28:31,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:31,293 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:31,293 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 6 states and 109 transitions. [2023-11-21 22:28:31,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 132 flow [2023-11-21 22:28:31,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 128 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-21 22:28:31,299 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 108 flow [2023-11-21 22:28:31,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=108, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-11-21 22:28:31,300 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 9 predicate places. [2023-11-21 22:28:31,301 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 108 flow [2023-11-21 22:28:31,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 22:28:31,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:31,301 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-21 22:28:31,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 22:28:31,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:28:31,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-21 22:28:31,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:31,518 INFO L85 PathProgramCache]: Analyzing trace with hash -155340864, now seen corresponding path program 2 times [2023-11-21 22:28:31,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:31,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605638626] [2023-11-21 22:28:31,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:31,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:31,691 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 22:28:31,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:31,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605638626] [2023-11-21 22:28:31,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605638626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:31,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:31,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:28:31,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885047378] [2023-11-21 22:28:31,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:31,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:28:31,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:31,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:28:31,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:28:31,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2023-11-21 22:28:31,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 22:28:31,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:31,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2023-11-21 22:28:31,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:31,780 INFO L124 PetriNetUnfolderBase]: 50/156 cut-off events. [2023-11-21 22:28:31,780 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:28:31,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 156 events. 50/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 568 event pairs, 35 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 271. Up to 85 conditions per place. [2023-11-21 22:28:31,783 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 28 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-11-21 22:28:31,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 180 flow [2023-11-21 22:28:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:28:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:28:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2023-11-21 22:28:31,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2023-11-21 22:28:31,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 63 transitions. [2023-11-21 22:28:31,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 63 transitions. [2023-11-21 22:28:31,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:31,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 63 transitions. [2023-11-21 22:28:31,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 22:28:31,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 22:28:31,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 22:28:31,787 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 108 flow. Second operand 3 states and 63 transitions. [2023-11-21 22:28:31,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 180 flow [2023-11-21 22:28:31,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 166 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-21 22:28:31,791 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 96 flow [2023-11-21 22:28:31,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-11-21 22:28:31,792 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 9 predicate places. [2023-11-21 22:28:31,792 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 96 flow [2023-11-21 22:28:31,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 22:28:31,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:31,793 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-21 22:28:31,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:28:31,794 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-21 22:28:31,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:31,794 INFO L85 PathProgramCache]: Analyzing trace with hash -155340863, now seen corresponding path program 1 times [2023-11-21 22:28:31,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:31,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643888934] [2023-11-21 22:28:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:31,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:31,910 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 22:28:31,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:31,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643888934] [2023-11-21 22:28:31,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643888934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:28:31,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338998043] [2023-11-21 22:28:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:31,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:28:31,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:28:31,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:28:31,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:28:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:31,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:28:32,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:28:32,028 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 22:28:32,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:28:32,097 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 22:28:32,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338998043] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:28:32,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:28:32,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-21 22:28:32,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324911604] [2023-11-21 22:28:32,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:28:32,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:28:32,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:28:32,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:28:32,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 32 [2023-11-21 22:28:32,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 96 flow. Second operand has 13 states, 13 states have (on average 15.076923076923077) internal successors, (196), 13 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:32,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:32,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 32 [2023-11-21 22:28:32,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:32,213 INFO L124 PetriNetUnfolderBase]: 50/161 cut-off events. [2023-11-21 22:28:32,213 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-21 22:28:32,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 161 events. 50/161 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 563 event pairs, 49 based on Foata normal form. 6/153 useless extension candidates. Maximal degree in co-relation 278. Up to 117 conditions per place. [2023-11-21 22:28:32,218 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 17 selfloop transitions, 11 changer transitions 0/40 dead transitions. [2023-11-21 22:28:32,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 40 transitions, 188 flow [2023-11-21 22:28:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:28:32,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 22:28:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2023-11-21 22:28:32,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2023-11-21 22:28:32,224 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 202 transitions. [2023-11-21 22:28:32,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 202 transitions. [2023-11-21 22:28:32,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:32,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 202 transitions. [2023-11-21 22:28:32,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 16.833333333333332) internal successors, (202), 12 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 22:28:32,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 32.0) internal successors, (416), 13 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 22:28:32,230 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 32.0) internal successors, (416), 13 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 22:28:32,231 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 96 flow. Second operand 12 states and 202 transitions. [2023-11-21 22:28:32,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 40 transitions, 188 flow [2023-11-21 22:28:32,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 40 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:28:32,238 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 176 flow [2023-11-21 22:28:32,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=176, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-11-21 22:28:32,240 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 24 predicate places. [2023-11-21 22:28:32,240 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 176 flow [2023-11-21 22:28:32,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.076923076923077) internal successors, (196), 13 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:32,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:32,242 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-21 22:28:32,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:28:32,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:28:32,457 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-21 22:28:32,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1209670047, now seen corresponding path program 2 times [2023-11-21 22:28:32,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:32,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065241880] [2023-11-21 22:28:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:32,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:32,625 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 22:28:32,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:32,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065241880] [2023-11-21 22:28:32,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065241880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:32,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:32,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:28:32,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178589708] [2023-11-21 22:28:32,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:32,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:28:32,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:32,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:28:32,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:28:32,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 32 [2023-11-21 22:28:32,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 22:28:32,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:32,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 32 [2023-11-21 22:28:32,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:32,741 INFO L124 PetriNetUnfolderBase]: 50/161 cut-off events. [2023-11-21 22:28:32,741 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-21 22:28:32,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 161 events. 50/161 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 567 event pairs, 35 based on Foata normal form. 1/149 useless extension candidates. Maximal degree in co-relation 275. Up to 84 conditions per place. [2023-11-21 22:28:32,743 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 33 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-21 22:28:32,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 46 transitions, 258 flow [2023-11-21 22:28:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:28:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:28:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-21 22:28:32,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2023-11-21 22:28:32,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-21 22:28:32,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-21 22:28:32,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:32,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-21 22:28:32,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 22:28:32,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 22:28:32,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 22:28:32,747 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 176 flow. Second operand 3 states and 65 transitions. [2023-11-21 22:28:32,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 46 transitions, 258 flow [2023-11-21 22:28:32,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 210 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-21 22:28:32,752 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 130 flow [2023-11-21 22:28:32,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-11-21 22:28:32,753 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-11-21 22:28:32,754 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 130 flow [2023-11-21 22:28:32,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 22:28:32,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:32,754 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:32,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:28:32,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-21 22:28:32,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:32,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1726990549, now seen corresponding path program 1 times [2023-11-21 22:28:32,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:32,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385631286] [2023-11-21 22:28:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:32,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:32,929 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 22:28:32,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:32,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385631286] [2023-11-21 22:28:32,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385631286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:32,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:32,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:28:32,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116941205] [2023-11-21 22:28:32,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:32,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:28:32,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:32,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:28:32,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:28:32,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 32 [2023-11-21 22:28:32,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 22:28:32,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:32,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 32 [2023-11-21 22:28:32,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:33,066 INFO L124 PetriNetUnfolderBase]: 50/157 cut-off events. [2023-11-21 22:28:33,066 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-21 22:28:33,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 157 events. 50/157 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 529 event pairs, 35 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 280. Up to 84 conditions per place. [2023-11-21 22:28:33,068 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 32 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2023-11-21 22:28:33,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 210 flow [2023-11-21 22:28:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:28:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:28:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2023-11-21 22:28:33,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2023-11-21 22:28:33,070 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 71 transitions. [2023-11-21 22:28:33,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 71 transitions. [2023-11-21 22:28:33,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:33,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 71 transitions. [2023-11-21 22:28:33,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 22:28:33,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 22:28:33,072 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 22:28:33,072 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 130 flow. Second operand 4 states and 71 transitions. [2023-11-21 22:28:33,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 210 flow [2023-11-21 22:28:33,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:28:33,076 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 128 flow [2023-11-21 22:28:33,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-11-21 22:28:33,077 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-11-21 22:28:33,077 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 128 flow [2023-11-21 22:28:33,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 22:28:33,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:33,077 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:33,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:28:33,078 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-21 22:28:33,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:33,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1726990548, now seen corresponding path program 1 times [2023-11-21 22:28:33,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:33,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555475175] [2023-11-21 22:28:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:33,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:33,390 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 22:28:33,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:33,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555475175] [2023-11-21 22:28:33,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555475175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:33,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:33,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:28:33,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10457335] [2023-11-21 22:28:33,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:33,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:28:33,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:33,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:28:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:28:33,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2023-11-21 22:28:33,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 22:28:33,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:33,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2023-11-21 22:28:33,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:33,532 INFO L124 PetriNetUnfolderBase]: 50/152 cut-off events. [2023-11-21 22:28:33,532 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-21 22:28:33,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 152 events. 50/152 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 496 event pairs, 42 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 275. Up to 99 conditions per place. [2023-11-21 22:28:33,535 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 29 selfloop transitions, 3 changer transitions 3/42 dead transitions. [2023-11-21 22:28:33,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 208 flow [2023-11-21 22:28:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:28:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:28:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2023-11-21 22:28:33,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5859375 [2023-11-21 22:28:33,540 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 75 transitions. [2023-11-21 22:28:33,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 75 transitions. [2023-11-21 22:28:33,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:33,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 75 transitions. [2023-11-21 22:28:33,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 22:28:33,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 22:28:33,543 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 22:28:33,543 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 128 flow. Second operand 4 states and 75 transitions. [2023-11-21 22:28:33,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 208 flow [2023-11-21 22:28:33,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 42 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:28:33,547 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 124 flow [2023-11-21 22:28:33,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-11-21 22:28:33,548 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-11-21 22:28:33,548 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 124 flow [2023-11-21 22:28:33,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 22:28:33,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:33,549 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:33,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:28:33,549 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-21 22:28:33,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:33,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1726720726, now seen corresponding path program 1 times [2023-11-21 22:28:33,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:33,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447698668] [2023-11-21 22:28:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:33,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:33,776 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 22:28:33,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:33,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447698668] [2023-11-21 22:28:33,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447698668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:33,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:33,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:28:33,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793586975] [2023-11-21 22:28:33,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:33,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:28:33,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:33,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:28:33,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:28:33,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2023-11-21 22:28:33,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 124 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 22:28:33,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:33,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2023-11-21 22:28:33,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:33,985 INFO L124 PetriNetUnfolderBase]: 57/177 cut-off events. [2023-11-21 22:28:33,985 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-11-21 22:28:33,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 177 events. 57/177 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 658 event pairs, 2 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 334. Up to 77 conditions per place. [2023-11-21 22:28:33,988 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 42 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2023-11-21 22:28:33,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 266 flow [2023-11-21 22:28:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:28:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:28:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2023-11-21 22:28:33,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2023-11-21 22:28:33,989 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 98 transitions. [2023-11-21 22:28:33,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 98 transitions. [2023-11-21 22:28:33,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:33,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 98 transitions. [2023-11-21 22:28:33,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:33,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:33,991 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:33,992 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 124 flow. Second operand 6 states and 98 transitions. [2023-11-21 22:28:33,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 266 flow [2023-11-21 22:28:33,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 258 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:28:33,996 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 166 flow [2023-11-21 22:28:33,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2023-11-21 22:28:33,999 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 22 predicate places. [2023-11-21 22:28:33,999 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 166 flow [2023-11-21 22:28:34,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 22:28:34,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:34,000 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:34,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:28:34,000 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-21 22:28:34,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:34,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1726720725, now seen corresponding path program 1 times [2023-11-21 22:28:34,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:34,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667534098] [2023-11-21 22:28:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:34,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:34,319 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 22:28:34,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:34,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667534098] [2023-11-21 22:28:34,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667534098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:34,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:34,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:28:34,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266682886] [2023-11-21 22:28:34,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:34,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:28:34,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:34,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:28:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:28:34,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2023-11-21 22:28:34,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 22:28:34,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:34,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2023-11-21 22:28:34,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:34,536 INFO L124 PetriNetUnfolderBase]: 55/157 cut-off events. [2023-11-21 22:28:34,536 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-11-21 22:28:34,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 157 events. 55/157 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 486 event pairs, 22 based on Foata normal form. 20/177 useless extension candidates. Maximal degree in co-relation 345. Up to 77 conditions per place. [2023-11-21 22:28:34,539 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 37 selfloop transitions, 6 changer transitions 1/49 dead transitions. [2023-11-21 22:28:34,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 49 transitions, 278 flow [2023-11-21 22:28:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:28:34,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:28:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2023-11-21 22:28:34,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-11-21 22:28:34,541 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 108 transitions. [2023-11-21 22:28:34,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 108 transitions. [2023-11-21 22:28:34,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:34,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 108 transitions. [2023-11-21 22:28:34,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:34,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:34,543 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:34,543 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 166 flow. Second operand 6 states and 108 transitions. [2023-11-21 22:28:34,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 49 transitions, 278 flow [2023-11-21 22:28:34,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 49 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:28:34,548 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 173 flow [2023-11-21 22:28:34,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=173, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2023-11-21 22:28:34,549 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 24 predicate places. [2023-11-21 22:28:34,550 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 173 flow [2023-11-21 22:28:34,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 22:28:34,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:34,552 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:34,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:28:34,552 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-21 22:28:34,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:34,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1695312750, now seen corresponding path program 1 times [2023-11-21 22:28:34,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:34,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81567376] [2023-11-21 22:28:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:34,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:34,715 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 22:28:34,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:34,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81567376] [2023-11-21 22:28:34,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81567376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:34,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:34,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:28:34,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093780127] [2023-11-21 22:28:34,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:34,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:28:34,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:34,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:28:34,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:28:34,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 32 [2023-11-21 22:28:34,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 22:28:34,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:34,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 32 [2023-11-21 22:28:34,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:34,822 INFO L124 PetriNetUnfolderBase]: 55/150 cut-off events. [2023-11-21 22:28:34,822 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2023-11-21 22:28:34,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 150 events. 55/150 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 426 event pairs, 42 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 355. Up to 84 conditions per place. [2023-11-21 22:28:34,824 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 24 selfloop transitions, 3 changer transitions 11/42 dead transitions. [2023-11-21 22:28:34,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 42 transitions, 263 flow [2023-11-21 22:28:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:28:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:28:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2023-11-21 22:28:34,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2023-11-21 22:28:34,825 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 78 transitions. [2023-11-21 22:28:34,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 78 transitions. [2023-11-21 22:28:34,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:34,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 78 transitions. [2023-11-21 22:28:34,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 22:28:34,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 22:28:34,827 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 22:28:34,827 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 173 flow. Second operand 4 states and 78 transitions. [2023-11-21 22:28:34,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 42 transitions, 263 flow [2023-11-21 22:28:34,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 42 transitions, 257 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:28:34,832 INFO L231 Difference]: Finished difference. Result has 57 places, 29 transitions, 137 flow [2023-11-21 22:28:34,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=57, PETRI_TRANSITIONS=29} [2023-11-21 22:28:34,833 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2023-11-21 22:28:34,833 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 29 transitions, 137 flow [2023-11-21 22:28:34,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 22:28:34,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:34,834 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:34,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:28:34,834 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-21 22:28:34,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:34,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1135611232, now seen corresponding path program 1 times [2023-11-21 22:28:34,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:34,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414307334] [2023-11-21 22:28:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:34,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:35,031 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 22:28:35,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:35,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414307334] [2023-11-21 22:28:35,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414307334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:35,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:35,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:28:35,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552241004] [2023-11-21 22:28:35,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:35,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:28:35,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:35,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:28:35,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:28:35,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2023-11-21 22:28:35,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 29 transitions, 137 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 22:28:35,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:35,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2023-11-21 22:28:35,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:35,266 INFO L124 PetriNetUnfolderBase]: 36/105 cut-off events. [2023-11-21 22:28:35,266 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2023-11-21 22:28:35,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 105 events. 36/105 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 269 event pairs, 1 based on Foata normal form. 4/109 useless extension candidates. Maximal degree in co-relation 276. Up to 32 conditions per place. [2023-11-21 22:28:35,268 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 24 selfloop transitions, 4 changer transitions 17/47 dead transitions. [2023-11-21 22:28:35,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 268 flow [2023-11-21 22:28:35,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:28:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:28:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2023-11-21 22:28:35,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2023-11-21 22:28:35,270 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 100 transitions. [2023-11-21 22:28:35,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 100 transitions. [2023-11-21 22:28:35,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:35,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 100 transitions. [2023-11-21 22:28:35,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 22:28:35,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:35,272 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:35,272 INFO L175 Difference]: Start difference. First operand has 57 places, 29 transitions, 137 flow. Second operand 7 states and 100 transitions. [2023-11-21 22:28:35,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 268 flow [2023-11-21 22:28:35,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 250 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-11-21 22:28:35,276 INFO L231 Difference]: Finished difference. Result has 53 places, 27 transitions, 128 flow [2023-11-21 22:28:35,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=128, PETRI_PLACES=53, PETRI_TRANSITIONS=27} [2023-11-21 22:28:35,277 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-11-21 22:28:35,277 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 27 transitions, 128 flow [2023-11-21 22:28:35,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 22:28:35,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:35,278 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:35,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:28:35,278 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-21 22:28:35,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:35,279 INFO L85 PathProgramCache]: Analyzing trace with hash -534541108, now seen corresponding path program 2 times [2023-11-21 22:28:35,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:35,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964809730] [2023-11-21 22:28:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:35,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:35,431 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 22:28:35,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:35,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964809730] [2023-11-21 22:28:35,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964809730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:35,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:35,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:28:35,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161863696] [2023-11-21 22:28:35,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:35,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:28:35,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:35,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:28:35,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:28:35,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2023-11-21 22:28:35,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 27 transitions, 128 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 22:28:35,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:35,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2023-11-21 22:28:35,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:35,621 INFO L124 PetriNetUnfolderBase]: 14/59 cut-off events. [2023-11-21 22:28:35,621 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-11-21 22:28:35,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 59 events. 14/59 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 6 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 169. Up to 19 conditions per place. [2023-11-21 22:28:35,622 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2023-11-21 22:28:35,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 32 transitions, 199 flow [2023-11-21 22:28:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:28:35,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:28:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2023-11-21 22:28:35,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-21 22:28:35,624 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 84 transitions. [2023-11-21 22:28:35,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 84 transitions. [2023-11-21 22:28:35,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:35,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 84 transitions. [2023-11-21 22:28:35,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 22:28:35,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:35,626 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:28:35,627 INFO L175 Difference]: Start difference. First operand has 53 places, 27 transitions, 128 flow. Second operand 7 states and 84 transitions. [2023-11-21 22:28:35,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 32 transitions, 199 flow [2023-11-21 22:28:35,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 32 transitions, 183 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-21 22:28:35,629 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2023-11-21 22:28:35,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2023-11-21 22:28:35,630 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2023-11-21 22:28:35,630 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2023-11-21 22:28:35,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 22:28:35,633 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-11-21 22:28:35,634 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-11-21 22:28:35,634 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-11-21 22:28:35,634 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-11-21 22:28:35,635 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-11-21 22:28:35,635 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-11-21 22:28:35,635 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2023-11-21 22:28:35,635 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2023-11-21 22:28:35,635 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-11-21 22:28:35,636 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-11-21 22:28:35,636 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-11-21 22:28:35,636 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-11-21 22:28:35,636 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-11-21 22:28:35,637 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-11-21 22:28:35,637 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-11-21 22:28:35,637 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2023-11-21 22:28:35,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:28:35,638 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:35,643 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-21 22:28:35,644 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 22:28:35,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 10:28:35 BasicIcfg [2023-11-21 22:28:35,650 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 22:28:35,650 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 22:28:35,650 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 22:28:35,651 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 22:28:35,651 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:28:30" (3/4) ... [2023-11-21 22:28:35,653 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-21 22:28:35,656 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-11-21 22:28:35,661 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 29 nodes and edges [2023-11-21 22:28:35,661 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-21 22:28:35,661 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-21 22:28:35,662 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-21 22:28:35,744 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/witness.graphml [2023-11-21 22:28:35,745 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/bin/uautomizer-verify-bycVGegfSx/witness.yml [2023-11-21 22:28:35,745 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 22:28:35,746 INFO L158 Benchmark]: Toolchain (without parser) took 7145.91ms. Allocated memory was 163.6MB in the beginning and 197.1MB in the end (delta: 33.6MB). Free memory was 118.7MB in the beginning and 73.6MB in the end (delta: 45.1MB). Peak memory consumption was 80.3MB. Max. memory is 16.1GB. [2023-11-21 22:28:35,746 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 104.9MB. Free memory is still 52.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:28:35,746 INFO L158 Benchmark]: CACSL2BoogieTranslator took 775.79ms. Allocated memory is still 163.6MB. Free memory was 118.2MB in the beginning and 133.3MB in the end (delta: -15.0MB). Peak memory consumption was 36.2MB. Max. memory is 16.1GB. [2023-11-21 22:28:35,747 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.80ms. Allocated memory is still 163.6MB. Free memory was 133.3MB in the beginning and 130.4MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:28:35,747 INFO L158 Benchmark]: Boogie Preprocessor took 65.65ms. Allocated memory is still 163.6MB. Free memory was 130.4MB in the beginning and 129.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:28:35,748 INFO L158 Benchmark]: RCFGBuilder took 635.00ms. Allocated memory is still 163.6MB. Free memory was 129.2MB in the beginning and 103.1MB in the end (delta: 26.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2023-11-21 22:28:35,748 INFO L158 Benchmark]: TraceAbstraction took 5511.70ms. Allocated memory was 163.6MB in the beginning and 197.1MB in the end (delta: 33.6MB). Free memory was 102.0MB in the beginning and 77.8MB in the end (delta: 24.2MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. [2023-11-21 22:28:35,749 INFO L158 Benchmark]: Witness Printer took 94.85ms. Allocated memory is still 197.1MB. Free memory was 77.8MB in the beginning and 73.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-21 22:28:35,751 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 104.9MB. Free memory is still 52.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 775.79ms. Allocated memory is still 163.6MB. Free memory was 118.2MB in the beginning and 133.3MB in the end (delta: -15.0MB). Peak memory consumption was 36.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.80ms. Allocated memory is still 163.6MB. Free memory was 133.3MB in the beginning and 130.4MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.65ms. Allocated memory is still 163.6MB. Free memory was 130.4MB in the beginning and 129.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 635.00ms. Allocated memory is still 163.6MB. Free memory was 129.2MB in the beginning and 103.1MB in the end (delta: 26.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 5511.70ms. Allocated memory was 163.6MB in the beginning and 197.1MB in the end (delta: 33.6MB). Free memory was 102.0MB in the beginning and 77.8MB in the end (delta: 24.2MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. * Witness Printer took 94.85ms. Allocated memory is still 197.1MB. Free memory was 77.8MB in the beginning and 73.6MB 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: 936]: 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, 45 locations, 16 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: 5.4s, OverallIterations: 12, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 689 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 556 mSDsluCounter, 65 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 47 mSDsCounter, 37 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1089 IncrementalHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 37 mSolverCounterUnsat, 18 mSDtfsCounter, 1089 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred in iteration=4, InterpolantAutomatonStates: 65, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 189 NumberOfCodeBlocks, 189 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 1326 SizeOfPredicates, 0 NumberOfNonLiveVariables, 113 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 16 InterpolantComputations, 10 PerfectInterpolantSequences, 450/483 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 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-21 22:28:35,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c63a59f-a748-4766-b1d8-b59d7ecfa4a7/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