./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:22:58,908 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:22:58,986 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:22:59,007 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:22:59,008 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:22:59,048 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:22:59,053 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:22:59,053 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:22:59,055 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:22:59,060 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:22:59,061 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:22:59,062 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:22:59,062 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:22:59,064 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:22:59,065 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:22:59,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:22:59,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:22:59,066 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:22:59,067 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:22:59,067 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:22:59,068 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:22:59,068 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:22:59,069 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:22:59,069 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:22:59,070 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:22:59,070 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:22:59,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:22:59,071 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:22:59,072 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:22:59,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:22:59,074 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:22:59,074 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:22:59,074 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:22:59,075 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:22:59,075 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:22:59,075 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:22:59,076 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:22:59,076 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:22:59,076 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_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 [2023-11-06 22:22:59,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:22:59,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:22:59,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:22:59,383 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:22:59,384 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:22:59,385 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-11-06 22:23:02,598 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:23:02,981 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:23:02,982 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-11-06 22:23:03,008 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/data/e2ba925bc/1e335f0f9204494aaf6963ec17c1c7d1/FLAG9141183f8 [2023-11-06 22:23:03,030 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/data/e2ba925bc/1e335f0f9204494aaf6963ec17c1c7d1 [2023-11-06 22:23:03,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:23:03,044 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:23:03,048 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:23:03,048 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:23:03,055 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:23:03,057 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:03,058 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64bee44b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03, skipping insertion in model container [2023-11-06 22:23:03,058 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:03,119 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:23:03,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:23:03,745 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:23:03,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:23:03,917 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:23:03,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03 WrapperNode [2023-11-06 22:23:03,918 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:23:03,920 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:23:03,920 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:23:03,920 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:23:03,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:03,963 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:04,020 INFO L138 Inliner]: procedures = 270, calls = 42, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 198 [2023-11-06 22:23:04,021 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:23:04,021 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:23:04,022 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:23:04,022 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:23:04,039 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:04,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:04,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:04,069 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:04,092 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:04,097 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:04,107 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:04,109 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:04,112 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:23:04,113 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:23:04,114 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:23:04,114 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:23:04,115 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03" (1/1) ... [2023-11-06 22:23:04,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:23:04,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:04,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:23:04,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:23:04,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:23:04,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:23:04,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:23:04,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:23:04,207 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:23:04,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:23:04,207 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:23:04,207 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:23:04,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:23:04,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:23:04,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:23:04,210 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:23:04,397 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:23:04,398 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:23:04,761 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:23:04,771 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:23:04,771 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-11-06 22:23:04,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:23:04 BoogieIcfgContainer [2023-11-06 22:23:04,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:23:04,777 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:23:04,777 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:23:04,781 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:23:04,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:23:03" (1/3) ... [2023-11-06 22:23:04,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d37e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:23:04, skipping insertion in model container [2023-11-06 22:23:04,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:03" (2/3) ... [2023-11-06 22:23:04,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d37e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:23:04, skipping insertion in model container [2023-11-06 22:23:04,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:23:04" (3/3) ... [2023-11-06 22:23:04,784 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2023-11-06 22:23:04,808 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:23:04,808 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-11-06 22:23:04,809 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:23:04,974 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:23:05,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 238 transitions, 483 flow [2023-11-06 22:23:05,192 INFO L124 PetriNetUnfolderBase]: 48/335 cut-off events. [2023-11-06 22:23:05,192 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:23:05,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 335 events. 48/335 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1341 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2023-11-06 22:23:05,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 238 transitions, 483 flow [2023-11-06 22:23:05,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 238 transitions, 483 flow [2023-11-06 22:23:05,216 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:23:05,226 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 238 transitions, 483 flow [2023-11-06 22:23:05,229 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 238 transitions, 483 flow [2023-11-06 22:23:05,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 238 transitions, 483 flow [2023-11-06 22:23:05,297 INFO L124 PetriNetUnfolderBase]: 48/335 cut-off events. [2023-11-06 22:23:05,298 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:23:05,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 335 events. 48/335 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1341 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2023-11-06 22:23:05,314 INFO L119 LiptonReduction]: Number of co-enabled transitions 17922 [2023-11-06 22:23:10,582 INFO L134 LiptonReduction]: Checked pairs total: 33449 [2023-11-06 22:23:10,582 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-11-06 22:23:10,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:23:10,606 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;@6312ef36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:23:10,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-06 22:23:10,609 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:23:10,609 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-06 22:23:10,609 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:23:10,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:10,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:23:10,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:23:10,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:10,616 INFO L85 PathProgramCache]: Analyzing trace with hash 954220, now seen corresponding path program 1 times [2023-11-06 22:23:10,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:10,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124068321] [2023-11-06 22:23:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:10,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:10,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:10,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124068321] [2023-11-06 22:23:10,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124068321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:10,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:10,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:23:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792686445] [2023-11-06 22:23:10,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:10,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:10,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:10,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:10,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:11,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 476 [2023-11-06 22:23:11,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:11,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:11,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 476 [2023-11-06 22:23:11,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:11,384 INFO L124 PetriNetUnfolderBase]: 661/1452 cut-off events. [2023-11-06 22:23:11,384 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:23:11,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2761 conditions, 1452 events. 661/1452 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9388 event pairs, 609 based on Foata normal form. 106/1016 useless extension candidates. Maximal degree in co-relation 2679. Up to 1303 conditions per place. [2023-11-06 22:23:11,399 INFO L140 encePairwiseOnDemand]: 445/476 looper letters, 55 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-06 22:23:11,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 255 flow [2023-11-06 22:23:11,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:23:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-11-06 22:23:11,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47829131652661067 [2023-11-06 22:23:11,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-11-06 22:23:11,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-11-06 22:23:11,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:11,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-11-06 22:23:11,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:11,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:11,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:11,453 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 195 flow. Second operand 3 states and 683 transitions. [2023-11-06 22:23:11,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 255 flow [2023-11-06 22:23:11,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 255 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:23:11,462 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 151 flow [2023-11-06 22:23:11,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-11-06 22:23:11,469 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-11-06 22:23:11,469 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 151 flow [2023-11-06 22:23:11,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:11,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:11,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:23:11,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:23:11,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:23:11,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:11,482 INFO L85 PathProgramCache]: Analyzing trace with hash 29540128, now seen corresponding path program 1 times [2023-11-06 22:23:11,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:11,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464342849] [2023-11-06 22:23:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:11,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:11,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464342849] [2023-11-06 22:23:11,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464342849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472241912] [2023-11-06 22:23:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:11,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:11,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:11,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:11,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:23:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:11,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:23:11,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:11,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:11,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472241912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:11,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:23:11,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:23:11,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589711444] [2023-11-06 22:23:11,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:11,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:23:11,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:11,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:23:11,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:23:11,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 476 [2023-11-06 22:23:11,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 151 flow. Second operand has 7 states, 7 states have (on average 199.28571428571428) internal successors, (1395), 7 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:11,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:11,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 476 [2023-11-06 22:23:11,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:12,124 INFO L124 PetriNetUnfolderBase]: 661/1455 cut-off events. [2023-11-06 22:23:12,125 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:23:12,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2777 conditions, 1455 events. 661/1455 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9398 event pairs, 609 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 2765. Up to 1303 conditions per place. [2023-11-06 22:23:12,136 INFO L140 encePairwiseOnDemand]: 473/476 looper letters, 55 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-11-06 22:23:12,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 283 flow [2023-11-06 22:23:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:23:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:23:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1251 transitions. [2023-11-06 22:23:12,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380252100840336 [2023-11-06 22:23:12,142 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1251 transitions. [2023-11-06 22:23:12,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1251 transitions. [2023-11-06 22:23:12,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:12,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1251 transitions. [2023-11-06 22:23:12,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 208.5) internal successors, (1251), 6 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 476.0) internal successors, (3332), 7 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,157 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 476.0) internal successors, (3332), 7 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,158 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 151 flow. Second operand 6 states and 1251 transitions. [2023-11-06 22:23:12,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 283 flow [2023-11-06 22:23:12,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 279 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:23:12,162 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 183 flow [2023-11-06 22:23:12,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2023-11-06 22:23:12,163 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-11-06 22:23:12,163 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 183 flow [2023-11-06 22:23:12,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 199.28571428571428) internal successors, (1395), 7 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:12,165 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:23:12,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:12,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:12,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:23:12,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:12,377 INFO L85 PathProgramCache]: Analyzing trace with hash -478811154, now seen corresponding path program 2 times [2023-11-06 22:23:12,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:12,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506461129] [2023-11-06 22:23:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:12,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:23:12,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:12,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506461129] [2023-11-06 22:23:12,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506461129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:12,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:12,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:23:12,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251731502] [2023-11-06 22:23:12,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:12,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:12,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:12,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:12,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 476 [2023-11-06 22:23:12,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:12,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 476 [2023-11-06 22:23:12,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:12,928 INFO L124 PetriNetUnfolderBase]: 615/1356 cut-off events. [2023-11-06 22:23:12,929 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:23:12,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2603 conditions, 1356 events. 615/1356 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8694 event pairs, 525 based on Foata normal form. 0/874 useless extension candidates. Maximal degree in co-relation 2569. Up to 1124 conditions per place. [2023-11-06 22:23:12,940 INFO L140 encePairwiseOnDemand]: 471/476 looper letters, 76 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-11-06 22:23:12,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 89 transitions, 379 flow [2023-11-06 22:23:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:23:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 665 transitions. [2023-11-06 22:23:12,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46568627450980393 [2023-11-06 22:23:12,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 665 transitions. [2023-11-06 22:23:12,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 665 transitions. [2023-11-06 22:23:12,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:12,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 665 transitions. [2023-11-06 22:23:12,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,955 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 183 flow. Second operand 3 states and 665 transitions. [2023-11-06 22:23:12,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 89 transitions, 379 flow [2023-11-06 22:23:12,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 89 transitions, 365 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:23:12,959 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 171 flow [2023-11-06 22:23:12,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2023-11-06 22:23:12,961 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-11-06 22:23:12,961 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 171 flow [2023-11-06 22:23:12,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:12,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:12,962 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:23:12,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:23:12,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:23:12,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash -478811156, now seen corresponding path program 1 times [2023-11-06 22:23:12,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:12,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136912129] [2023-11-06 22:23:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:12,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:13,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:13,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136912129] [2023-11-06 22:23:13,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136912129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:13,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103759143] [2023-11-06 22:23:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:13,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:13,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:13,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:13,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:23:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:13,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:23:13,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:13,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:13,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103759143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:13,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:23:13,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:23:13,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685347834] [2023-11-06 22:23:13,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:13,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:23:13,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:13,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:23:13,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:23:13,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 476 [2023-11-06 22:23:13,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 171 flow. Second operand has 13 states, 13 states have (on average 199.15384615384616) internal successors, (2589), 13 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:13,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:13,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 476 [2023-11-06 22:23:13,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:13,564 INFO L124 PetriNetUnfolderBase]: 617/1366 cut-off events. [2023-11-06 22:23:13,564 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-06 22:23:13,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2672 conditions, 1366 events. 617/1366 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8668 event pairs, 567 based on Foata normal form. 6/914 useless extension candidates. Maximal degree in co-relation 2620. Up to 1215 conditions per place. [2023-11-06 22:23:13,575 INFO L140 encePairwiseOnDemand]: 473/476 looper letters, 53 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-11-06 22:23:13,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 335 flow [2023-11-06 22:23:13,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:23:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:23:13,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2446 transitions. [2023-11-06 22:23:13,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42822128851540614 [2023-11-06 22:23:13,586 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2446 transitions. [2023-11-06 22:23:13,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2446 transitions. [2023-11-06 22:23:13,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:13,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2446 transitions. [2023-11-06 22:23:13,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 203.83333333333334) internal successors, (2446), 12 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:13,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 476.0) internal successors, (6188), 13 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:13,641 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 476.0) internal successors, (6188), 13 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:13,641 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 171 flow. Second operand 12 states and 2446 transitions. [2023-11-06 22:23:13,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 335 flow [2023-11-06 22:23:13,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 329 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:23:13,647 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 249 flow [2023-11-06 22:23:13,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=249, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2023-11-06 22:23:13,648 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2023-11-06 22:23:13,648 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 249 flow [2023-11-06 22:23:13,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.15384615384616) internal successors, (2589), 13 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:13,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:13,650 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-06 22:23:13,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:13,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:13,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:23:13,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2010726740, now seen corresponding path program 2 times [2023-11-06 22:23:13,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:13,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156619496] [2023-11-06 22:23:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:13,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:23:14,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:14,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156619496] [2023-11-06 22:23:14,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156619496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:14,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:14,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:23:14,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28939755] [2023-11-06 22:23:14,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:14,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:14,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:14,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:14,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:14,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 476 [2023-11-06 22:23:14,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:14,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:14,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 476 [2023-11-06 22:23:14,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:14,430 INFO L124 PetriNetUnfolderBase]: 617/1312 cut-off events. [2023-11-06 22:23:14,430 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-06 22:23:14,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2580 conditions, 1312 events. 617/1312 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8392 event pairs, 442 based on Foata normal form. 0/845 useless extension candidates. Maximal degree in co-relation 2504. Up to 1180 conditions per place. [2023-11-06 22:23:14,442 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 84 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-11-06 22:23:14,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 96 transitions, 465 flow [2023-11-06 22:23:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:14,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:23:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-11-06 22:23:14,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2023-11-06 22:23:14,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-11-06 22:23:14,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-11-06 22:23:14,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:14,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-11-06 22:23:14,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:14,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:14,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:14,453 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 249 flow. Second operand 3 states and 672 transitions. [2023-11-06 22:23:14,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 96 transitions, 465 flow [2023-11-06 22:23:14,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 96 transitions, 417 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-06 22:23:14,459 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 211 flow [2023-11-06 22:23:14,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2023-11-06 22:23:14,460 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2023-11-06 22:23:14,460 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 211 flow [2023-11-06 22:23:14,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:14,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:14,461 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:14,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:23:14,462 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:23:14,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:14,462 INFO L85 PathProgramCache]: Analyzing trace with hash 349291939, now seen corresponding path program 1 times [2023-11-06 22:23:14,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:14,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086658138] [2023-11-06 22:23:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:14,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:23:14,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:14,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086658138] [2023-11-06 22:23:14,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086658138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:14,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676913872] [2023-11-06 22:23:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:14,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:14,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:14,646 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:14,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:23:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:14,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:23:14,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:14,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:23:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:23:14,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:23:14,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676913872] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:14,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:23:14,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:23:14,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526364615] [2023-11-06 22:23:14,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:14,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:23:14,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:14,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:23:14,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:23:15,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 476 [2023-11-06 22:23:15,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:15,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:15,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 476 [2023-11-06 22:23:15,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:15,377 INFO L124 PetriNetUnfolderBase]: 46/138 cut-off events. [2023-11-06 22:23:15,377 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-06 22:23:15,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 138 events. 46/138 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 453 event pairs, 17 based on Foata normal form. 22/138 useless extension candidates. Maximal degree in co-relation 293. Up to 86 conditions per place. [2023-11-06 22:23:15,379 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 57 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-06 22:23:15,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 304 flow [2023-11-06 22:23:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:23:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:23:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 831 transitions. [2023-11-06 22:23:15,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364495798319328 [2023-11-06 22:23:15,383 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 831 transitions. [2023-11-06 22:23:15,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 831 transitions. [2023-11-06 22:23:15,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:15,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 831 transitions. [2023-11-06 22:23:15,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.75) internal successors, (831), 4 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:15,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:15,392 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:15,393 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 211 flow. Second operand 4 states and 831 transitions. [2023-11-06 22:23:15,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 304 flow [2023-11-06 22:23:15,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 298 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:23:15,396 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 140 flow [2023-11-06 22:23:15,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-11-06 22:23:15,397 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2023-11-06 22:23:15,397 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 140 flow [2023-11-06 22:23:15,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:15,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:15,399 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:15,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:15,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:15,605 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:23:15,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2056811011, now seen corresponding path program 1 times [2023-11-06 22:23:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:15,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252363343] [2023-11-06 22:23:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:15,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:23:15,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:15,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252363343] [2023-11-06 22:23:15,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252363343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:15,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:15,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:23:15,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054408562] [2023-11-06 22:23:15,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:15,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:23:15,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:23:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:23:16,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 476 [2023-11-06 22:23:16,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 182.33333333333334) internal successors, (1094), 6 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:16,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:16,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 476 [2023-11-06 22:23:16,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:16,375 INFO L124 PetriNetUnfolderBase]: 40/123 cut-off events. [2023-11-06 22:23:16,375 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-06 22:23:16,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 123 events. 40/123 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 336 event pairs, 0 based on Foata normal form. 9/111 useless extension candidates. Maximal degree in co-relation 238. Up to 90 conditions per place. [2023-11-06 22:23:16,377 INFO L140 encePairwiseOnDemand]: 470/476 looper letters, 33 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-11-06 22:23:16,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 42 transitions, 212 flow [2023-11-06 22:23:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:23:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:23:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 934 transitions. [2023-11-06 22:23:16,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39243697478991596 [2023-11-06 22:23:16,382 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 934 transitions. [2023-11-06 22:23:16,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 934 transitions. [2023-11-06 22:23:16,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:16,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 934 transitions. [2023-11-06 22:23:16,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.8) internal successors, (934), 5 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:16,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:16,399 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:16,399 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 140 flow. Second operand 5 states and 934 transitions. [2023-11-06 22:23:16,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 42 transitions, 212 flow [2023-11-06 22:23:16,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 42 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:23:16,402 INFO L231 Difference]: Finished difference. Result has 57 places, 40 transitions, 137 flow [2023-11-06 22:23:16,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=57, PETRI_TRANSITIONS=40} [2023-11-06 22:23:16,403 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -14 predicate places. [2023-11-06 22:23:16,403 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 40 transitions, 137 flow [2023-11-06 22:23:16,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 182.33333333333334) internal successors, (1094), 6 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:16,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:16,405 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-06 22:23:16,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:23:16,405 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:23:16,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:16,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2056851054, now seen corresponding path program 1 times [2023-11-06 22:23:16,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:16,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820678718] [2023-11-06 22:23:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:16,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:23:16,430 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:23:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:23:16,465 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:23:16,466 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:23:16,467 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2023-11-06 22:23:16,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2023-11-06 22:23:16,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-11-06 22:23:16,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-11-06 22:23:16,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-11-06 22:23:16,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2023-11-06 22:23:16,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-11-06 22:23:16,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2023-11-06 22:23:16,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-11-06 22:23:16,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (29 of 39 remaining) [2023-11-06 22:23:16,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-11-06 22:23:16,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-11-06 22:23:16,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-11-06 22:23:16,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-11-06 22:23:16,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-11-06 22:23:16,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-11-06 22:23:16,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2023-11-06 22:23:16,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-11-06 22:23:16,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-11-06 22:23:16,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-11-06 22:23:16,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-11-06 22:23:16,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-11-06 22:23:16,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-11-06 22:23:16,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-11-06 22:23:16,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-11-06 22:23:16,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-11-06 22:23:16,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-11-06 22:23:16,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2023-11-06 22:23:16,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-11-06 22:23:16,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2023-11-06 22:23:16,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-11-06 22:23:16,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-11-06 22:23:16,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-11-06 22:23:16,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-11-06 22:23:16,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-11-06 22:23:16,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-11-06 22:23:16,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-11-06 22:23:16,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-11-06 22:23:16,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2023-11-06 22:23:16,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:23:16,477 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-11-06 22:23:16,480 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:23:16,480 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:23:16,527 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:23:16,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 284 places, 327 transitions, 670 flow [2023-11-06 22:23:16,615 INFO L124 PetriNetUnfolderBase]: 80/552 cut-off events. [2023-11-06 22:23:16,615 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-06 22:23:16,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 552 events. 80/552 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2599 event pairs, 0 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 337. Up to 12 conditions per place. [2023-11-06 22:23:16,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 284 places, 327 transitions, 670 flow [2023-11-06 22:23:16,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 284 places, 327 transitions, 670 flow [2023-11-06 22:23:16,635 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:23:16,636 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 284 places, 327 transitions, 670 flow [2023-11-06 22:23:16,636 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 284 places, 327 transitions, 670 flow [2023-11-06 22:23:16,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 284 places, 327 transitions, 670 flow [2023-11-06 22:23:16,717 INFO L124 PetriNetUnfolderBase]: 80/552 cut-off events. [2023-11-06 22:23:16,718 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-06 22:23:16,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 552 events. 80/552 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2599 event pairs, 0 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 337. Up to 12 conditions per place. [2023-11-06 22:23:16,761 INFO L119 LiptonReduction]: Number of co-enabled transitions 52896 [2023-11-06 22:23:22,604 INFO L134 LiptonReduction]: Checked pairs total: 102842 [2023-11-06 22:23:22,604 INFO L136 LiptonReduction]: Total number of compositions: 318 [2023-11-06 22:23:22,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:23:22,607 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;@6312ef36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:23:22,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-11-06 22:23:22,609 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:23:22,609 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-06 22:23:22,610 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:23:22,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:22,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:23:22,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:23:22,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1679910, now seen corresponding path program 1 times [2023-11-06 22:23:22,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:22,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558255016] [2023-11-06 22:23:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:22,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:22,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:22,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558255016] [2023-11-06 22:23:22,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558255016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:22,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:22,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:23:22,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171629048] [2023-11-06 22:23:22,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:22,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:22,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:22,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:22,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 645 [2023-11-06 22:23:22,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 137 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:22,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:22,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 645 [2023-11-06 22:23:22,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:27,790 INFO L124 PetriNetUnfolderBase]: 28201/45446 cut-off events. [2023-11-06 22:23:27,790 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2023-11-06 22:23:27,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87017 conditions, 45446 events. 28201/45446 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 1894. Compared 375538 event pairs, 26736 based on Foata normal form. 3624/32258 useless extension candidates. Maximal degree in co-relation 35374. Up to 41457 conditions per place. [2023-11-06 22:23:28,099 INFO L140 encePairwiseOnDemand]: 601/645 looper letters, 77 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2023-11-06 22:23:28,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 368 flow [2023-11-06 22:23:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:23:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 937 transitions. [2023-11-06 22:23:28,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4842377260981912 [2023-11-06 22:23:28,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 937 transitions. [2023-11-06 22:23:28,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 937 transitions. [2023-11-06 22:23:28,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:28,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 937 transitions. [2023-11-06 22:23:28,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:28,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 645.0) internal successors, (2580), 4 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:28,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 645.0) internal successors, (2580), 4 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:28,115 INFO L175 Difference]: Start difference. First operand has 103 places, 137 transitions, 290 flow. Second operand 3 states and 937 transitions. [2023-11-06 22:23:28,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 368 flow [2023-11-06 22:23:28,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 368 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:23:28,121 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 220 flow [2023-11-06 22:23:28,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=645, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2023-11-06 22:23:28,124 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-11-06 22:23:28,124 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 220 flow [2023-11-06 22:23:28,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:28,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:28,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:23:28,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:23:28,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:23:28,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:28,126 INFO L85 PathProgramCache]: Analyzing trace with hash 52053608, now seen corresponding path program 1 times [2023-11-06 22:23:28,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:28,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685072214] [2023-11-06 22:23:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:28,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:28,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:28,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685072214] [2023-11-06 22:23:28,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685072214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:28,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442642863] [2023-11-06 22:23:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:28,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:28,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:28,161 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:28,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:23:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:28,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:23:28,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:28,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:28,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442642863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:28,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:23:28,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:23:28,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485206834] [2023-11-06 22:23:28,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:28,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:23:28,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:28,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:23:28,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:23:28,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 645 [2023-11-06 22:23:28,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 272.2857142857143) internal successors, (1906), 7 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:28,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:28,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 645 [2023-11-06 22:23:28,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:32,946 INFO L124 PetriNetUnfolderBase]: 28201/45449 cut-off events. [2023-11-06 22:23:32,946 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2023-11-06 22:23:33,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87033 conditions, 45449 events. 28201/45449 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 1894. Compared 375371 event pairs, 26736 based on Foata normal form. 0/28637 useless extension candidates. Maximal degree in co-relation 87020. Up to 41457 conditions per place. [2023-11-06 22:23:33,434 INFO L140 encePairwiseOnDemand]: 642/645 looper letters, 77 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2023-11-06 22:23:33,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 396 flow [2023-11-06 22:23:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:23:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:23:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1711 transitions. [2023-11-06 22:23:33,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421188630490956 [2023-11-06 22:23:33,442 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1711 transitions. [2023-11-06 22:23:33,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1711 transitions. [2023-11-06 22:23:33,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:33,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1711 transitions. [2023-11-06 22:23:33,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.1666666666667) internal successors, (1711), 6 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:33,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 645.0) internal successors, (4515), 7 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:33,459 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 645.0) internal successors, (4515), 7 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:33,460 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 220 flow. Second operand 6 states and 1711 transitions. [2023-11-06 22:23:33,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 396 flow [2023-11-06 22:23:33,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 392 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:23:33,464 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 252 flow [2023-11-06 22:23:33,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=645, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2023-11-06 22:23:33,466 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 2 predicate places. [2023-11-06 22:23:33,466 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 252 flow [2023-11-06 22:23:33,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 272.2857142857143) internal successors, (1906), 7 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:33,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:33,484 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:23:33,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:33,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:33,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:23:33,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:33,685 INFO L85 PathProgramCache]: Analyzing trace with hash 222405286, now seen corresponding path program 2 times [2023-11-06 22:23:33,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:33,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488645671] [2023-11-06 22:23:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:33,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:33,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:33,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488645671] [2023-11-06 22:23:33,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488645671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:33,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55367298] [2023-11-06 22:23:33,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:23:33,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:33,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:33,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:33,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:23:33,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:23:33,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:23:33,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:23:33,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:33,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:23:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:23:33,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:33,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55367298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:33,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:23:33,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-06 22:23:33,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291287009] [2023-11-06 22:23:33,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:33,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:33,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:33,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:33,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:23:33,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 645 [2023-11-06 22:23:33,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:33,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:33,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 645 [2023-11-06 22:23:33,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:37,969 INFO L124 PetriNetUnfolderBase]: 27810/44598 cut-off events. [2023-11-06 22:23:37,969 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-11-06 22:23:38,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86174 conditions, 44598 events. 27810/44598 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 1868. Compared 368250 event pairs, 12936 based on Foata normal form. 0/28298 useless extension candidates. Maximal degree in co-relation 86139. Up to 41416 conditions per place. [2023-11-06 22:23:38,249 INFO L140 encePairwiseOnDemand]: 641/645 looper letters, 103 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2023-11-06 22:23:38,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 123 transitions, 508 flow [2023-11-06 22:23:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:23:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 916 transitions. [2023-11-06 22:23:38,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47338501291989665 [2023-11-06 22:23:38,254 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 916 transitions. [2023-11-06 22:23:38,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 916 transitions. [2023-11-06 22:23:38,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:38,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 916 transitions. [2023-11-06 22:23:38,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:38,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 645.0) internal successors, (2580), 4 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:38,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 645.0) internal successors, (2580), 4 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:38,265 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 252 flow. Second operand 3 states and 916 transitions. [2023-11-06 22:23:38,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 123 transitions, 508 flow [2023-11-06 22:23:38,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 123 transitions, 494 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:23:38,269 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 252 flow [2023-11-06 22:23:38,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=645, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2023-11-06 22:23:38,270 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 4 predicate places. [2023-11-06 22:23:38,270 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 252 flow [2023-11-06 22:23:38,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:38,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:38,271 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:23:38,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:38,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:23:38,477 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:23:38,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:38,477 INFO L85 PathProgramCache]: Analyzing trace with hash 222405287, now seen corresponding path program 1 times [2023-11-06 22:23:38,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:38,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896671166] [2023-11-06 22:23:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:38,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:23:38,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:38,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896671166] [2023-11-06 22:23:38,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896671166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:38,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:38,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:23:38,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109338565] [2023-11-06 22:23:38,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:38,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:38,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:38,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 645 [2023-11-06 22:23:38,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:38,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:38,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 645 [2023-11-06 22:23:38,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:42,979 INFO L124 PetriNetUnfolderBase]: 26358/41888 cut-off events. [2023-11-06 22:23:42,979 INFO L125 PetriNetUnfolderBase]: For 1109/1109 co-relation queries the response was YES. [2023-11-06 22:23:43,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82117 conditions, 41888 events. 26358/41888 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 1773. Compared 339551 event pairs, 23069 based on Foata normal form. 0/27283 useless extension candidates. Maximal degree in co-relation 82087. Up to 35764 conditions per place. [2023-11-06 22:23:43,256 INFO L140 encePairwiseOnDemand]: 640/645 looper letters, 119 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2023-11-06 22:23:43,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 140 transitions, 574 flow [2023-11-06 22:23:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:23:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 926 transitions. [2023-11-06 22:23:43,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785529715762274 [2023-11-06 22:23:43,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 926 transitions. [2023-11-06 22:23:43,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 926 transitions. [2023-11-06 22:23:43,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:43,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 926 transitions. [2023-11-06 22:23:43,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.6666666666667) internal successors, (926), 3 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:43,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 645.0) internal successors, (2580), 4 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:43,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 645.0) internal successors, (2580), 4 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:43,272 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 252 flow. Second operand 3 states and 926 transitions. [2023-11-06 22:23:43,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 140 transitions, 574 flow [2023-11-06 22:23:43,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 140 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:23:43,279 INFO L231 Difference]: Finished difference. Result has 106 places, 99 transitions, 252 flow [2023-11-06 22:23:43,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=645, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=106, PETRI_TRANSITIONS=99} [2023-11-06 22:23:43,286 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 3 predicate places. [2023-11-06 22:23:43,287 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 99 transitions, 252 flow [2023-11-06 22:23:43,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:43,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:43,288 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:43,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:23:43,288 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:23:43,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:43,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2069728432, now seen corresponding path program 1 times [2023-11-06 22:23:43,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:43,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648087564] [2023-11-06 22:23:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:43,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:43,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:43,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648087564] [2023-11-06 22:23:43,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648087564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:43,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861318214] [2023-11-06 22:23:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:43,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:43,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:43,382 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:43,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:23:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:43,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:23:43,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:43,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:43,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861318214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:43,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:23:43,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:23:43,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448662455] [2023-11-06 22:23:43,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:43,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:23:43,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:23:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:23:43,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 645 [2023-11-06 22:23:43,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 99 transitions, 252 flow. Second operand has 13 states, 13 states have (on average 272.46153846153845) internal successors, (3542), 13 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:43,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:43,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 645 [2023-11-06 22:23:43,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:48,000 INFO L124 PetriNetUnfolderBase]: 26438/42014 cut-off events. [2023-11-06 22:23:48,000 INFO L125 PetriNetUnfolderBase]: For 1412/1412 co-relation queries the response was YES. [2023-11-06 22:23:48,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83253 conditions, 42014 events. 26438/42014 cut-off events. For 1412/1412 co-relation queries the response was YES. Maximal size of possible extension queue 1769. Compared 339243 event pairs, 24913 based on Foata normal form. 6/27939 useless extension candidates. Maximal degree in co-relation 83199. Up to 38623 conditions per place. [2023-11-06 22:23:48,260 INFO L140 encePairwiseOnDemand]: 642/645 looper letters, 76 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2023-11-06 22:23:48,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 105 transitions, 462 flow [2023-11-06 22:23:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:23:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:23:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3344 transitions. [2023-11-06 22:23:48,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320413436692506 [2023-11-06 22:23:48,273 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3344 transitions. [2023-11-06 22:23:48,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3344 transitions. [2023-11-06 22:23:48,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:48,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3344 transitions. [2023-11-06 22:23:48,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 278.6666666666667) internal successors, (3344), 12 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:48,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 645.0) internal successors, (8385), 13 states have internal predecessors, (8385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:48,303 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 645.0) internal successors, (8385), 13 states have internal predecessors, (8385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:48,304 INFO L175 Difference]: Start difference. First operand has 106 places, 99 transitions, 252 flow. Second operand 12 states and 3344 transitions. [2023-11-06 22:23:48,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 105 transitions, 462 flow [2023-11-06 22:23:48,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 105 transitions, 456 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:23:48,394 INFO L231 Difference]: Finished difference. Result has 121 places, 105 transitions, 330 flow [2023-11-06 22:23:48,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=645, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=330, PETRI_PLACES=121, PETRI_TRANSITIONS=105} [2023-11-06 22:23:48,395 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-11-06 22:23:48,395 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 105 transitions, 330 flow [2023-11-06 22:23:48,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 272.46153846153845) internal successors, (3542), 13 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:48,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:48,397 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:48,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:48,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:48,602 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:23:48,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:48,602 INFO L85 PathProgramCache]: Analyzing trace with hash 554120560, now seen corresponding path program 2 times [2023-11-06 22:23:48,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:48,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329030404] [2023-11-06 22:23:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:48,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:23:48,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:48,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329030404] [2023-11-06 22:23:48,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329030404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:48,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:48,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:23:48,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644804189] [2023-11-06 22:23:48,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:48,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:23:48,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:48,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:23:48,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:23:49,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 645 [2023-11-06 22:23:49,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 105 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 255.33333333333334) internal successors, (1532), 6 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:49,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:49,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 645 [2023-11-06 22:23:49,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:53,459 INFO L124 PetriNetUnfolderBase]: 20359/34156 cut-off events. [2023-11-06 22:23:53,460 INFO L125 PetriNetUnfolderBase]: For 994/994 co-relation queries the response was YES. [2023-11-06 22:23:53,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66256 conditions, 34156 events. 20359/34156 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 1359. Compared 297325 event pairs, 483 based on Foata normal form. 599/24449 useless extension candidates. Maximal degree in co-relation 66178. Up to 27190 conditions per place. [2023-11-06 22:23:53,667 INFO L140 encePairwiseOnDemand]: 634/645 looper letters, 183 selfloop transitions, 8 changer transitions 0/208 dead transitions. [2023-11-06 22:23:53,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 208 transitions, 934 flow [2023-11-06 22:23:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:23:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:23:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1715 transitions. [2023-11-06 22:23:53,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44315245478036175 [2023-11-06 22:23:53,674 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1715 transitions. [2023-11-06 22:23:53,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1715 transitions. [2023-11-06 22:23:53,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:53,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1715 transitions. [2023-11-06 22:23:53,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.8333333333333) internal successors, (1715), 6 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:53,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 645.0) internal successors, (4515), 7 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:53,690 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 645.0) internal successors, (4515), 7 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:53,690 INFO L175 Difference]: Start difference. First operand has 121 places, 105 transitions, 330 flow. Second operand 6 states and 1715 transitions. [2023-11-06 22:23:53,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 208 transitions, 934 flow [2023-11-06 22:23:53,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 208 transitions, 886 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-06 22:23:53,697 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 292 flow [2023-11-06 22:23:53,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=645, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2023-11-06 22:23:53,701 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 12 predicate places. [2023-11-06 22:23:53,701 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 292 flow [2023-11-06 22:23:53,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 255.33333333333334) internal successors, (1532), 6 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:53,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:53,702 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:53,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:23:53,702 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:23:53,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:53,703 INFO L85 PathProgramCache]: Analyzing trace with hash 553503591, now seen corresponding path program 1 times [2023-11-06 22:23:53,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:53,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124898855] [2023-11-06 22:23:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:53,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:23:53,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:53,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124898855] [2023-11-06 22:23:53,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124898855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:53,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196411125] [2023-11-06 22:23:53,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:53,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:53,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:53,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:53,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:23:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:53,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:23:53,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:53,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:23:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:23:53,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:23:54,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196411125] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:54,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:23:54,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:23:54,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864576562] [2023-11-06 22:23:54,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:54,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:23:54,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:54,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:23:54,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:23:54,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 645 [2023-11-06 22:23:54,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 102 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 270.0) internal successors, (1890), 7 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:54,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:54,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 645 [2023-11-06 22:23:54,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:57,476 INFO L124 PetriNetUnfolderBase]: 18349/29887 cut-off events. [2023-11-06 22:23:57,476 INFO L125 PetriNetUnfolderBase]: For 1427/1427 co-relation queries the response was YES. [2023-11-06 22:23:57,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60000 conditions, 29887 events. 18349/29887 cut-off events. For 1427/1427 co-relation queries the response was YES. Maximal size of possible extension queue 1314. Compared 244802 event pairs, 1 based on Foata normal form. 18/21694 useless extension candidates. Maximal degree in co-relation 59945. Up to 24596 conditions per place. [2023-11-06 22:23:57,677 INFO L140 encePairwiseOnDemand]: 641/645 looper letters, 174 selfloop transitions, 4 changer transitions 0/196 dead transitions. [2023-11-06 22:23:57,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 196 transitions, 840 flow [2023-11-06 22:23:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:23:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:23:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1508 transitions. [2023-11-06 22:23:57,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675968992248062 [2023-11-06 22:23:57,684 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1508 transitions. [2023-11-06 22:23:57,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1508 transitions. [2023-11-06 22:23:57,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:57,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1508 transitions. [2023-11-06 22:23:57,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 301.6) internal successors, (1508), 5 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:57,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 645.0) internal successors, (3870), 6 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:57,699 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 645.0) internal successors, (3870), 6 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:57,699 INFO L175 Difference]: Start difference. First operand has 115 places, 102 transitions, 292 flow. Second operand 5 states and 1508 transitions. [2023-11-06 22:23:57,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 196 transitions, 840 flow [2023-11-06 22:23:57,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 196 transitions, 839 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:23:57,710 INFO L231 Difference]: Finished difference. Result has 117 places, 101 transitions, 295 flow [2023-11-06 22:23:57,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=645, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=117, PETRI_TRANSITIONS=101} [2023-11-06 22:23:57,711 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 14 predicate places. [2023-11-06 22:23:57,712 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 101 transitions, 295 flow [2023-11-06 22:23:57,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 270.0) internal successors, (1890), 7 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:57,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:57,713 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:57,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:57,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:57,920 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:23:57,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2134054, now seen corresponding path program 1 times [2023-11-06 22:23:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:57,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918796065] [2023-11-06 22:23:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:57,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:23:58,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:58,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918796065] [2023-11-06 22:23:58,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918796065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:58,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:58,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:23:58,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138077433] [2023-11-06 22:23:58,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:58,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:23:58,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:58,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:23:58,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:23:58,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 645 [2023-11-06 22:23:58,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 101 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 249.5) internal successors, (1497), 6 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:58,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:58,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 645 [2023-11-06 22:23:58,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:01,651 INFO L124 PetriNetUnfolderBase]: 18037/28525 cut-off events. [2023-11-06 22:24:01,651 INFO L125 PetriNetUnfolderBase]: For 2512/2512 co-relation queries the response was YES. [2023-11-06 22:24:01,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58367 conditions, 28525 events. 18037/28525 cut-off events. For 2512/2512 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 212564 event pairs, 8722 based on Foata normal form. 0/21892 useless extension candidates. Maximal degree in co-relation 58312. Up to 22482 conditions per place. [2023-11-06 22:24:02,069 INFO L140 encePairwiseOnDemand]: 630/645 looper letters, 186 selfloop transitions, 12 changer transitions 0/212 dead transitions. [2023-11-06 22:24:02,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 212 transitions, 933 flow [2023-11-06 22:24:02,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:24:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:24:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1434 transitions. [2023-11-06 22:24:02,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44465116279069766 [2023-11-06 22:24:02,075 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1434 transitions. [2023-11-06 22:24:02,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1434 transitions. [2023-11-06 22:24:02,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:02,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1434 transitions. [2023-11-06 22:24:02,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.8) internal successors, (1434), 5 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:02,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 645.0) internal successors, (3870), 6 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:02,086 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 645.0) internal successors, (3870), 6 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:02,086 INFO L175 Difference]: Start difference. First operand has 117 places, 101 transitions, 295 flow. Second operand 5 states and 1434 transitions. [2023-11-06 22:24:02,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 212 transitions, 933 flow [2023-11-06 22:24:02,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 212 transitions, 916 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 22:24:02,096 INFO L231 Difference]: Finished difference. Result has 121 places, 107 transitions, 369 flow [2023-11-06 22:24:02,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=645, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=121, PETRI_TRANSITIONS=107} [2023-11-06 22:24:02,097 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-11-06 22:24:02,097 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 107 transitions, 369 flow [2023-11-06 22:24:02,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 249.5) internal successors, (1497), 6 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:02,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:02,098 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:02,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 22:24:02,098 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:24:02,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:02,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2133618, now seen corresponding path program 1 times [2023-11-06 22:24:02,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:02,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132479355] [2023-11-06 22:24:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:02,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:24:02,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:02,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132479355] [2023-11-06 22:24:02,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132479355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:02,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:02,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:24:02,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31600935] [2023-11-06 22:24:02,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:02,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:24:02,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:02,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:24:02,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:24:02,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 645 [2023-11-06 22:24:02,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 107 transitions, 369 flow. Second operand has 6 states, 6 states have (on average 257.5) internal successors, (1545), 6 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:02,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:02,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 645 [2023-11-06 22:24:02,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:07,215 INFO L124 PetriNetUnfolderBase]: 23926/39591 cut-off events. [2023-11-06 22:24:07,215 INFO L125 PetriNetUnfolderBase]: For 10552/10970 co-relation queries the response was YES. [2023-11-06 22:24:07,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88170 conditions, 39591 events. 23926/39591 cut-off events. For 10552/10970 co-relation queries the response was YES. Maximal size of possible extension queue 1502. Compared 335649 event pairs, 5113 based on Foata normal form. 44/30603 useless extension candidates. Maximal degree in co-relation 88112. Up to 20667 conditions per place. [2023-11-06 22:24:07,480 INFO L140 encePairwiseOnDemand]: 631/645 looper letters, 249 selfloop transitions, 32 changer transitions 0/300 dead transitions. [2023-11-06 22:24:07,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 300 transitions, 1469 flow [2023-11-06 22:24:07,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:24:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:24:07,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2052 transitions. [2023-11-06 22:24:07,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45448504983388704 [2023-11-06 22:24:07,487 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2052 transitions. [2023-11-06 22:24:07,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2052 transitions. [2023-11-06 22:24:07,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:07,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2052 transitions. [2023-11-06 22:24:07,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 293.14285714285717) internal successors, (2052), 7 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:07,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 645.0) internal successors, (5160), 8 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:07,502 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 645.0) internal successors, (5160), 8 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:07,502 INFO L175 Difference]: Start difference. First operand has 121 places, 107 transitions, 369 flow. Second operand 7 states and 2052 transitions. [2023-11-06 22:24:07,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 300 transitions, 1469 flow [2023-11-06 22:24:07,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 300 transitions, 1452 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:24:07,619 INFO L231 Difference]: Finished difference. Result has 130 places, 137 transitions, 635 flow [2023-11-06 22:24:07,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=645, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=635, PETRI_PLACES=130, PETRI_TRANSITIONS=137} [2023-11-06 22:24:07,620 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 27 predicate places. [2023-11-06 22:24:07,620 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 137 transitions, 635 flow [2023-11-06 22:24:07,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 257.5) internal successors, (1545), 6 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:07,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:07,620 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:07,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 22:24:07,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:24:07,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:07,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1889157471, now seen corresponding path program 1 times [2023-11-06 22:24:07,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:07,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019773279] [2023-11-06 22:24:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:07,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 22:24:07,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:07,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019773279] [2023-11-06 22:24:07,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019773279] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:24:07,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075462105] [2023-11-06 22:24:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:07,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:07,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:07,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:07,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b79c4d-2600-44f6-9e19-3def70179125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:24:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:07,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:24:07,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:08,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:08,111 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:24:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-06 22:24:08,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:08,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075462105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:08,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:24:08,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2023-11-06 22:24:08,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614434245] [2023-11-06 22:24:08,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:08,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:24:08,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:08,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:24:08,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:24:08,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 645 [2023-11-06 22:24:08,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 137 transitions, 635 flow. Second operand has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:08,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:08,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 645 [2023-11-06 22:24:08,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand