./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 9bd2c7ff 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_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/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_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:47:00,982 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:47:01,052 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:47:01,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:47:01,058 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:47:01,083 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:47:01,084 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:47:01,085 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:47:01,085 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:47:01,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:47:01,087 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:47:01,088 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:47:01,088 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:47:01,089 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:47:01,089 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:47:01,090 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:47:01,090 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:47:01,096 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:47:01,096 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:47:01,097 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:47:01,097 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:47:01,102 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:47:01,102 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:47:01,103 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:47:01,106 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:47:01,107 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:47:01,107 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:47:01,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:47:01,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:47:01,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:01,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:47:01,109 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:47:01,110 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:47:01,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:47:01,110 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:47:01,111 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:47:01,111 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:47:01,112 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:47:01,112 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_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 [2023-11-19 07:47:01,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:47:01,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:47:01,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:47:01,435 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:47:01,435 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:47:01,437 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-11-19 07:47:04,740 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:47:05,083 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:47:05,084 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-11-19 07:47:05,122 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/data/a88f3bf15/e35637d56a834be994e6f15650e5530a/FLAG2905c5ef8 [2023-11-19 07:47:05,138 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/data/a88f3bf15/e35637d56a834be994e6f15650e5530a [2023-11-19 07:47:05,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:47:05,142 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:47:05,144 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:05,144 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:47:05,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:47:05,151 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:05,152 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20360e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05, skipping insertion in model container [2023-11-19 07:47:05,152 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:05,237 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:47:05,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:05,783 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:47:05,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:05,955 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:47:05,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05 WrapperNode [2023-11-19 07:47:05,955 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:05,956 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:05,957 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:47:05,957 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:47:05,966 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:06,035 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:06,087 INFO L138 Inliner]: procedures = 270, calls = 42, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 198 [2023-11-19 07:47:06,088 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:06,088 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:47:06,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:47:06,089 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:47:06,098 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:06,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:06,116 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:06,116 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:06,140 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:06,145 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:06,147 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:06,149 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:06,152 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:47:06,153 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:47:06,153 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:47:06,153 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:47:06,154 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05" (1/1) ... [2023-11-19 07:47:06,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:06,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:06,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:47:06,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:47:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:47:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:47:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:47:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:47:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:47:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:47:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:47:06,269 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:47:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:47:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:47:06,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:47:06,271 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:47:06,474 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:47:06,476 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:47:06,877 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:47:06,890 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:47:06,890 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-11-19 07:47:06,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:06 BoogieIcfgContainer [2023-11-19 07:47:06,904 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:47:06,906 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:47:06,906 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:47:06,914 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:47:06,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:47:05" (1/3) ... [2023-11-19 07:47:06,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5624bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:06, skipping insertion in model container [2023-11-19 07:47:06,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:05" (2/3) ... [2023-11-19 07:47:06,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5624bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:06, skipping insertion in model container [2023-11-19 07:47:06,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:06" (3/3) ... [2023-11-19 07:47:06,917 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2023-11-19 07:47:06,935 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:47:06,935 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-11-19 07:47:06,936 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:47:07,041 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 07:47:07,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 238 transitions, 483 flow [2023-11-19 07:47:07,214 INFO L124 PetriNetUnfolderBase]: 48/335 cut-off events. [2023-11-19 07:47:07,214 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:47:07,224 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. [2023-11-19 07:47:07,224 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 238 transitions, 483 flow [2023-11-19 07:47:07,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 238 transitions, 483 flow [2023-11-19 07:47:07,239 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:47:07,250 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 238 transitions, 483 flow [2023-11-19 07:47:07,253 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 238 transitions, 483 flow [2023-11-19 07:47:07,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 238 transitions, 483 flow [2023-11-19 07:47:07,347 INFO L124 PetriNetUnfolderBase]: 48/335 cut-off events. [2023-11-19 07:47:07,347 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:47:07,354 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. [2023-11-19 07:47:07,369 INFO L119 LiptonReduction]: Number of co-enabled transitions 17922 [2023-11-19 07:47:12,834 INFO L134 LiptonReduction]: Checked pairs total: 33449 [2023-11-19 07:47:12,835 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-11-19 07:47:12,859 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:47:12,868 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;@4315378e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:47:12,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-19 07:47:12,876 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:47:12,876 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-19 07:47:12,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:47:12,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:12,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:47:12,878 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)] === [2023-11-19 07:47:12,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:12,887 INFO L85 PathProgramCache]: Analyzing trace with hash 954220, now seen corresponding path program 1 times [2023-11-19 07:47:12,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:12,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898297413] [2023-11-19 07:47:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:12,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:13,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898297413] [2023-11-19 07:47:13,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898297413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:13,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:13,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:13,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986092326] [2023-11-19 07:47:13,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:13,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:13,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:13,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:13,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:13,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 476 [2023-11-19 07:47:13,226 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) [2023-11-19 07:47:13,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:13,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 476 [2023-11-19 07:47:13,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:13,554 INFO L124 PetriNetUnfolderBase]: 661/1452 cut-off events. [2023-11-19 07:47:13,555 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:47:13,557 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. [2023-11-19 07:47:13,567 INFO L140 encePairwiseOnDemand]: 445/476 looper letters, 55 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-19 07:47:13,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 255 flow [2023-11-19 07:47:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-11-19 07:47:13,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47829131652661067 [2023-11-19 07:47:13,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-11-19 07:47:13,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-11-19 07:47:13,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:13,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-11-19 07:47:13,606 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) [2023-11-19 07:47:13,614 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) [2023-11-19 07:47:13,616 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) [2023-11-19 07:47:13,618 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 195 flow. Second operand 3 states and 683 transitions. [2023-11-19 07:47:13,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 255 flow [2023-11-19 07:47:13,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 255 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:47:13,627 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 151 flow [2023-11-19 07:47:13,629 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} [2023-11-19 07:47:13,633 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-11-19 07:47:13,633 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 151 flow [2023-11-19 07:47:13,634 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) [2023-11-19 07:47:13,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:13,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:47:13,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:47:13,635 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)] === [2023-11-19 07:47:13,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash 29540128, now seen corresponding path program 1 times [2023-11-19 07:47:13,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:13,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847441515] [2023-11-19 07:47:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:13,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:13,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:13,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847441515] [2023-11-19 07:47:13,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847441515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:13,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887317024] [2023-11-19 07:47:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:13,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:13,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:13,743 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:13,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:47:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:13,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:47:13,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:13,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:13,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887317024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:13,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:13,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:47:13,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884952223] [2023-11-19 07:47:13,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:13,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:47:13,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:13,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:47:13,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:47:13,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 476 [2023-11-19 07:47:13,949 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) [2023-11-19 07:47:13,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:13,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 476 [2023-11-19 07:47:13,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:14,277 INFO L124 PetriNetUnfolderBase]: 661/1455 cut-off events. [2023-11-19 07:47:14,277 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:47:14,280 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. [2023-11-19 07:47:14,290 INFO L140 encePairwiseOnDemand]: 473/476 looper letters, 55 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-11-19 07:47:14,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 283 flow [2023-11-19 07:47:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:47:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:47:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1251 transitions. [2023-11-19 07:47:14,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380252100840336 [2023-11-19 07:47:14,297 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1251 transitions. [2023-11-19 07:47:14,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1251 transitions. [2023-11-19 07:47:14,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:14,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1251 transitions. [2023-11-19 07:47:14,303 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) [2023-11-19 07:47:14,310 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) [2023-11-19 07:47:14,313 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) [2023-11-19 07:47:14,313 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 151 flow. Second operand 6 states and 1251 transitions. [2023-11-19 07:47:14,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 283 flow [2023-11-19 07:47:14,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 279 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:14,318 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 183 flow [2023-11-19 07:47:14,318 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} [2023-11-19 07:47:14,319 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-11-19 07:47:14,319 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 183 flow [2023-11-19 07:47:14,321 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) [2023-11-19 07:47:14,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:14,321 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-19 07:47:14,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:14,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:14,543 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)] === [2023-11-19 07:47:14,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash -478811154, now seen corresponding path program 2 times [2023-11-19 07:47:14,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:14,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844919216] [2023-11-19 07:47:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:14,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:47:14,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:14,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844919216] [2023-11-19 07:47:14,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844919216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:14,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:14,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:14,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448133165] [2023-11-19 07:47:14,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:14,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:14,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:14,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:14,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 476 [2023-11-19 07:47:14,806 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) [2023-11-19 07:47:14,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:14,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 476 [2023-11-19 07:47:14,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:15,101 INFO L124 PetriNetUnfolderBase]: 615/1356 cut-off events. [2023-11-19 07:47:15,101 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:47:15,104 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. [2023-11-19 07:47:15,114 INFO L140 encePairwiseOnDemand]: 471/476 looper letters, 76 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-11-19 07:47:15,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 89 transitions, 379 flow [2023-11-19 07:47:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 665 transitions. [2023-11-19 07:47:15,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46568627450980393 [2023-11-19 07:47:15,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 665 transitions. [2023-11-19 07:47:15,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 665 transitions. [2023-11-19 07:47:15,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:15,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 665 transitions. [2023-11-19 07:47:15,123 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) [2023-11-19 07:47:15,127 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) [2023-11-19 07:47:15,129 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) [2023-11-19 07:47:15,129 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 183 flow. Second operand 3 states and 665 transitions. [2023-11-19 07:47:15,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 89 transitions, 379 flow [2023-11-19 07:47:15,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 89 transitions, 365 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:15,136 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 171 flow [2023-11-19 07:47:15,136 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} [2023-11-19 07:47:15,138 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-11-19 07:47:15,138 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 171 flow [2023-11-19 07:47:15,139 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) [2023-11-19 07:47:15,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:15,140 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-19 07:47:15,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:47:15,140 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)] === [2023-11-19 07:47:15,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:15,142 INFO L85 PathProgramCache]: Analyzing trace with hash -478811156, now seen corresponding path program 1 times [2023-11-19 07:47:15,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:15,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027982358] [2023-11-19 07:47:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:15,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:15,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:15,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027982358] [2023-11-19 07:47:15,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027982358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:15,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258298515] [2023-11-19 07:47:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:15,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:15,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:15,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:15,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:47:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:15,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:47:15,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:15,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:15,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258298515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:15,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:15,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 07:47:15,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191480617] [2023-11-19 07:47:15,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:15,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:47:15,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:15,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:47:15,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:47:15,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 476 [2023-11-19 07:47:15,546 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) [2023-11-19 07:47:15,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:15,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 476 [2023-11-19 07:47:15,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:15,883 INFO L124 PetriNetUnfolderBase]: 617/1366 cut-off events. [2023-11-19 07:47:15,883 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-19 07:47:15,887 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. [2023-11-19 07:47:15,896 INFO L140 encePairwiseOnDemand]: 473/476 looper letters, 53 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-11-19 07:47:15,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 335 flow [2023-11-19 07:47:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:47:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:47:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2446 transitions. [2023-11-19 07:47:15,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42822128851540614 [2023-11-19 07:47:15,906 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2446 transitions. [2023-11-19 07:47:15,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2446 transitions. [2023-11-19 07:47:15,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:15,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2446 transitions. [2023-11-19 07:47:15,918 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) [2023-11-19 07:47:15,933 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) [2023-11-19 07:47:15,936 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) [2023-11-19 07:47:15,937 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 171 flow. Second operand 12 states and 2446 transitions. [2023-11-19 07:47:15,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 335 flow [2023-11-19 07:47:15,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 329 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:15,947 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 249 flow [2023-11-19 07:47:15,951 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} [2023-11-19 07:47:15,955 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2023-11-19 07:47:15,955 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 249 flow [2023-11-19 07:47:15,957 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) [2023-11-19 07:47:15,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:15,957 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-19 07:47:15,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:16,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:16,171 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)] === [2023-11-19 07:47:16,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:16,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2010726740, now seen corresponding path program 2 times [2023-11-19 07:47:16,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:16,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827384430] [2023-11-19 07:47:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:16,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:47:16,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:16,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827384430] [2023-11-19 07:47:16,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827384430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:16,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:16,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:16,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585087634] [2023-11-19 07:47:16,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:16,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:16,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:16,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:16,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:16,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 476 [2023-11-19 07:47:16,461 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) [2023-11-19 07:47:16,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:16,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 476 [2023-11-19 07:47:16,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:16,766 INFO L124 PetriNetUnfolderBase]: 617/1312 cut-off events. [2023-11-19 07:47:16,766 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-19 07:47:16,770 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. [2023-11-19 07:47:16,778 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 84 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-11-19 07:47:16,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 96 transitions, 465 flow [2023-11-19 07:47:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-11-19 07:47:16,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2023-11-19 07:47:16,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-11-19 07:47:16,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-11-19 07:47:16,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:16,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-11-19 07:47:16,785 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) [2023-11-19 07:47:16,789 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) [2023-11-19 07:47:16,790 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) [2023-11-19 07:47:16,791 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 249 flow. Second operand 3 states and 672 transitions. [2023-11-19 07:47:16,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 96 transitions, 465 flow [2023-11-19 07:47:16,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 96 transitions, 417 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-19 07:47:16,796 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 211 flow [2023-11-19 07:47:16,796 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} [2023-11-19 07:47:16,797 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2023-11-19 07:47:16,797 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 211 flow [2023-11-19 07:47:16,798 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) [2023-11-19 07:47:16,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:16,798 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:16,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:47:16,799 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)] === [2023-11-19 07:47:16,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash 349291939, now seen corresponding path program 1 times [2023-11-19 07:47:16,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:16,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719567923] [2023-11-19 07:47:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:16,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:47:16,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719567923] [2023-11-19 07:47:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719567923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135714269] [2023-11-19 07:47:16,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:16,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:16,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:16,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:16,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:47:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:17,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:47:17,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:17,098 INFO L378 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 [2023-11-19 07:47:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:47:17,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:47:17,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135714269] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:17,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:17,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:47:17,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575856972] [2023-11-19 07:47:17,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:17,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:47:17,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:17,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:47:17,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:47:17,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 476 [2023-11-19 07:47:17,540 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) [2023-11-19 07:47:17,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:17,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 476 [2023-11-19 07:47:17,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:17,665 INFO L124 PetriNetUnfolderBase]: 46/138 cut-off events. [2023-11-19 07:47:17,666 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-19 07:47:17,666 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. [2023-11-19 07:47:17,667 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 57 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-19 07:47:17,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 304 flow [2023-11-19 07:47:17,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:47:17,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:47:17,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 831 transitions. [2023-11-19 07:47:17,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364495798319328 [2023-11-19 07:47:17,672 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 831 transitions. [2023-11-19 07:47:17,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 831 transitions. [2023-11-19 07:47:17,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:17,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 831 transitions. [2023-11-19 07:47:17,676 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) [2023-11-19 07:47:17,680 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) [2023-11-19 07:47:17,681 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) [2023-11-19 07:47:17,681 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 211 flow. Second operand 4 states and 831 transitions. [2023-11-19 07:47:17,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 304 flow [2023-11-19 07:47:17,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 298 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:47:17,684 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 140 flow [2023-11-19 07:47:17,685 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} [2023-11-19 07:47:17,686 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2023-11-19 07:47:17,686 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 140 flow [2023-11-19 07:47:17,687 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) [2023-11-19 07:47:17,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:17,687 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:17,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:17,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:47:17,908 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)] === [2023-11-19 07:47:17,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:17,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2056811011, now seen corresponding path program 1 times [2023-11-19 07:47:17,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:17,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439046853] [2023-11-19 07:47:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:17,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:47:18,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:18,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439046853] [2023-11-19 07:47:18,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439046853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:18,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:18,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:47:18,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015587783] [2023-11-19 07:47:18,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:18,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:47:18,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:18,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:47:18,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:47:18,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 476 [2023-11-19 07:47:18,533 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) [2023-11-19 07:47:18,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:18,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 476 [2023-11-19 07:47:18,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:18,632 INFO L124 PetriNetUnfolderBase]: 40/123 cut-off events. [2023-11-19 07:47:18,633 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-19 07:47:18,633 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. [2023-11-19 07:47:18,634 INFO L140 encePairwiseOnDemand]: 470/476 looper letters, 33 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-11-19 07:47:18,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 42 transitions, 212 flow [2023-11-19 07:47:18,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:47:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:47:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 934 transitions. [2023-11-19 07:47:18,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39243697478991596 [2023-11-19 07:47:18,640 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 934 transitions. [2023-11-19 07:47:18,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 934 transitions. [2023-11-19 07:47:18,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:18,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 934 transitions. [2023-11-19 07:47:18,644 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) [2023-11-19 07:47:18,650 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) [2023-11-19 07:47:18,651 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) [2023-11-19 07:47:18,651 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 140 flow. Second operand 5 states and 934 transitions. [2023-11-19 07:47:18,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 42 transitions, 212 flow [2023-11-19 07:47:18,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 42 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:18,656 INFO L231 Difference]: Finished difference. Result has 57 places, 40 transitions, 137 flow [2023-11-19 07:47:18,656 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} [2023-11-19 07:47:18,657 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -14 predicate places. [2023-11-19 07:47:18,658 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 40 transitions, 137 flow [2023-11-19 07:47:18,658 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) [2023-11-19 07:47:18,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:18,659 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-19 07:47:18,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:47:18,660 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)] === [2023-11-19 07:47:18,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2056851054, now seen corresponding path program 1 times [2023-11-19 07:47:18,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:18,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878956009] [2023-11-19 07:47:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:18,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:47:18,694 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:47:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:47:18,742 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:47:18,743 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:47:18,744 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2023-11-19 07:47:18,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2023-11-19 07:47:18,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-11-19 07:47:18,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-11-19 07:47:18,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-11-19 07:47:18,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2023-11-19 07:47:18,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-11-19 07:47:18,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2023-11-19 07:47:18,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-11-19 07:47:18,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (29 of 39 remaining) [2023-11-19 07:47:18,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-11-19 07:47:18,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-11-19 07:47:18,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-11-19 07:47:18,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-11-19 07:47:18,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-11-19 07:47:18,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-11-19 07:47:18,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2023-11-19 07:47:18,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-11-19 07:47:18,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-11-19 07:47:18,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-11-19 07:47:18,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-11-19 07:47:18,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-11-19 07:47:18,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-11-19 07:47:18,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-11-19 07:47:18,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-11-19 07:47:18,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-11-19 07:47:18,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-11-19 07:47:18,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2023-11-19 07:47:18,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-11-19 07:47:18,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2023-11-19 07:47:18,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-11-19 07:47:18,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-11-19 07:47:18,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-11-19 07:47:18,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-11-19 07:47:18,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-11-19 07:47:18,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-11-19 07:47:18,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-11-19 07:47:18,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-11-19 07:47:18,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2023-11-19 07:47:18,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:47:18,755 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-11-19 07:47:18,758 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:47:18,758 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:47:18,828 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:47:18,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 284 places, 327 transitions, 670 flow [2023-11-19 07:47:18,916 INFO L124 PetriNetUnfolderBase]: 80/552 cut-off events. [2023-11-19 07:47:18,916 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-19 07:47:18,924 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. [2023-11-19 07:47:18,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 284 places, 327 transitions, 670 flow [2023-11-19 07:47:18,934 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 284 places, 327 transitions, 670 flow [2023-11-19 07:47:18,935 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:47:18,935 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 284 places, 327 transitions, 670 flow [2023-11-19 07:47:18,935 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 284 places, 327 transitions, 670 flow [2023-11-19 07:47:18,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 284 places, 327 transitions, 670 flow [2023-11-19 07:47:19,041 INFO L124 PetriNetUnfolderBase]: 80/552 cut-off events. [2023-11-19 07:47:19,041 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-19 07:47:19,050 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. [2023-11-19 07:47:19,082 INFO L119 LiptonReduction]: Number of co-enabled transitions 52896 [2023-11-19 07:47:24,975 INFO L134 LiptonReduction]: Checked pairs total: 102842 [2023-11-19 07:47:24,975 INFO L136 LiptonReduction]: Total number of compositions: 318 [2023-11-19 07:47:24,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:47:24,985 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;@4315378e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:47:24,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-11-19 07:47:24,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:47:24,987 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-19 07:47:24,987 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:47:24,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:24,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:47:24,987 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)] === [2023-11-19 07:47:24,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:24,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1679910, now seen corresponding path program 1 times [2023-11-19 07:47:24,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:24,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592300350] [2023-11-19 07:47:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:24,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:25,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:25,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592300350] [2023-11-19 07:47:25,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592300350] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:25,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:25,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:25,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926138613] [2023-11-19 07:47:25,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:25,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:25,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:25,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:25,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:25,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 645 [2023-11-19 07:47:25,028 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) [2023-11-19 07:47:25,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:25,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 645 [2023-11-19 07:47:25,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:30,423 INFO L124 PetriNetUnfolderBase]: 28201/45446 cut-off events. [2023-11-19 07:47:30,424 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2023-11-19 07:47:30,517 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. [2023-11-19 07:47:30,761 INFO L140 encePairwiseOnDemand]: 601/645 looper letters, 77 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2023-11-19 07:47:30,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 368 flow [2023-11-19 07:47:30,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 937 transitions. [2023-11-19 07:47:30,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4842377260981912 [2023-11-19 07:47:30,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 937 transitions. [2023-11-19 07:47:30,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 937 transitions. [2023-11-19 07:47:30,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:30,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 937 transitions. [2023-11-19 07:47:30,771 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) [2023-11-19 07:47:30,775 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) [2023-11-19 07:47:30,777 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) [2023-11-19 07:47:30,777 INFO L175 Difference]: Start difference. First operand has 103 places, 137 transitions, 290 flow. Second operand 3 states and 937 transitions. [2023-11-19 07:47:30,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 368 flow [2023-11-19 07:47:30,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 368 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:47:30,782 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 220 flow [2023-11-19 07:47:30,782 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} [2023-11-19 07:47:30,785 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-11-19 07:47:30,785 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 220 flow [2023-11-19 07:47:30,785 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) [2023-11-19 07:47:30,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:30,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:47:30,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:47:30,786 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)] === [2023-11-19 07:47:30,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash 52053608, now seen corresponding path program 1 times [2023-11-19 07:47:30,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:30,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953267882] [2023-11-19 07:47:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:30,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:30,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:30,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953267882] [2023-11-19 07:47:30,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953267882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:30,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833621160] [2023-11-19 07:47:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:30,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:30,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:30,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:30,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:47:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:30,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:47:30,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:30,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:30,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833621160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:30,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:30,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:47:30,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948472653] [2023-11-19 07:47:30,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:30,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:47:30,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:30,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:47:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:47:30,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 645 [2023-11-19 07:47:30,973 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) [2023-11-19 07:47:30,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:30,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 645 [2023-11-19 07:47:30,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:35,045 INFO L124 PetriNetUnfolderBase]: 28201/45449 cut-off events. [2023-11-19 07:47:35,045 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2023-11-19 07:47:35,119 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. [2023-11-19 07:47:35,553 INFO L140 encePairwiseOnDemand]: 642/645 looper letters, 77 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2023-11-19 07:47:35,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 396 flow [2023-11-19 07:47:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:47:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:47:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1711 transitions. [2023-11-19 07:47:35,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421188630490956 [2023-11-19 07:47:35,563 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1711 transitions. [2023-11-19 07:47:35,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1711 transitions. [2023-11-19 07:47:35,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:35,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1711 transitions. [2023-11-19 07:47:35,571 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) [2023-11-19 07:47:35,581 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) [2023-11-19 07:47:35,583 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) [2023-11-19 07:47:35,584 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 220 flow. Second operand 6 states and 1711 transitions. [2023-11-19 07:47:35,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 396 flow [2023-11-19 07:47:35,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 392 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:35,589 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 252 flow [2023-11-19 07:47:35,590 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} [2023-11-19 07:47:35,591 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 2 predicate places. [2023-11-19 07:47:35,591 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 252 flow [2023-11-19 07:47:35,601 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) [2023-11-19 07:47:35,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:35,609 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-19 07:47:35,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:35,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:35,830 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)] === [2023-11-19 07:47:35,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash 222405286, now seen corresponding path program 2 times [2023-11-19 07:47:35,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:35,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029052659] [2023-11-19 07:47:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:35,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:35,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:35,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029052659] [2023-11-19 07:47:35,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029052659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:35,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659879830] [2023-11-19 07:47:35,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:47:35,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:35,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:35,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:35,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:47:36,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:47:36,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:36,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:47:36,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:36,032 INFO L378 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 [2023-11-19 07:47:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:47:36,047 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:36,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659879830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:36,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:36,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-19 07:47:36,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876701655] [2023-11-19 07:47:36,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:36,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:36,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:36,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:36,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:47:36,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 645 [2023-11-19 07:47:36,165 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) [2023-11-19 07:47:36,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:36,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 645 [2023-11-19 07:47:36,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:40,772 INFO L124 PetriNetUnfolderBase]: 27810/44598 cut-off events. [2023-11-19 07:47:40,773 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-11-19 07:47:40,867 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. [2023-11-19 07:47:41,039 INFO L140 encePairwiseOnDemand]: 641/645 looper letters, 103 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2023-11-19 07:47:41,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 123 transitions, 508 flow [2023-11-19 07:47:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 916 transitions. [2023-11-19 07:47:41,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47338501291989665 [2023-11-19 07:47:41,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 916 transitions. [2023-11-19 07:47:41,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 916 transitions. [2023-11-19 07:47:41,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:41,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 916 transitions. [2023-11-19 07:47:41,050 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) [2023-11-19 07:47:41,054 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) [2023-11-19 07:47:41,055 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) [2023-11-19 07:47:41,055 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 252 flow. Second operand 3 states and 916 transitions. [2023-11-19 07:47:41,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 123 transitions, 508 flow [2023-11-19 07:47:41,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 123 transitions, 494 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:41,060 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 252 flow [2023-11-19 07:47:41,060 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} [2023-11-19 07:47:41,061 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 4 predicate places. [2023-11-19 07:47:41,062 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 252 flow [2023-11-19 07:47:41,062 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) [2023-11-19 07:47:41,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:41,062 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-19 07:47:41,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:41,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:41,292 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)] === [2023-11-19 07:47:41,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:41,293 INFO L85 PathProgramCache]: Analyzing trace with hash 222405287, now seen corresponding path program 1 times [2023-11-19 07:47:41,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:41,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886479369] [2023-11-19 07:47:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:41,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:47:41,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:41,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886479369] [2023-11-19 07:47:41,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886479369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:41,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:41,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:41,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127812535] [2023-11-19 07:47:41,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:41,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:41,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:41,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:41,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:41,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 645 [2023-11-19 07:47:41,447 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) [2023-11-19 07:47:41,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:41,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 645 [2023-11-19 07:47:41,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:45,541 INFO L124 PetriNetUnfolderBase]: 26358/41888 cut-off events. [2023-11-19 07:47:45,541 INFO L125 PetriNetUnfolderBase]: For 1109/1109 co-relation queries the response was YES. [2023-11-19 07:47:45,649 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. [2023-11-19 07:47:45,836 INFO L140 encePairwiseOnDemand]: 640/645 looper letters, 119 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2023-11-19 07:47:45,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 140 transitions, 574 flow [2023-11-19 07:47:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 926 transitions. [2023-11-19 07:47:45,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785529715762274 [2023-11-19 07:47:45,841 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 926 transitions. [2023-11-19 07:47:45,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 926 transitions. [2023-11-19 07:47:45,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:45,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 926 transitions. [2023-11-19 07:47:45,846 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) [2023-11-19 07:47:45,851 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) [2023-11-19 07:47:45,852 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) [2023-11-19 07:47:45,852 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 252 flow. Second operand 3 states and 926 transitions. [2023-11-19 07:47:45,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 140 transitions, 574 flow [2023-11-19 07:47:45,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 140 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:45,859 INFO L231 Difference]: Finished difference. Result has 106 places, 99 transitions, 252 flow [2023-11-19 07:47:45,860 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} [2023-11-19 07:47:45,860 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 3 predicate places. [2023-11-19 07:47:45,861 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 99 transitions, 252 flow [2023-11-19 07:47:45,861 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) [2023-11-19 07:47:45,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:45,862 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:45,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:47:45,862 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)] === [2023-11-19 07:47:45,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:45,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2069728432, now seen corresponding path program 1 times [2023-11-19 07:47:45,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:45,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536527328] [2023-11-19 07:47:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:45,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:45,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:45,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536527328] [2023-11-19 07:47:45,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536527328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:45,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82995448] [2023-11-19 07:47:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:45,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:45,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:45,953 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:45,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:47:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:46,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:47:46,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:46,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:46,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82995448] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:46,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:46,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 07:47:46,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980486834] [2023-11-19 07:47:46,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:46,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:47:46,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:46,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:47:46,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:47:46,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 645 [2023-11-19 07:47:46,189 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) [2023-11-19 07:47:46,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:46,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 645 [2023-11-19 07:47:46,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:50,732 INFO L124 PetriNetUnfolderBase]: 26438/42014 cut-off events. [2023-11-19 07:47:50,732 INFO L125 PetriNetUnfolderBase]: For 1412/1412 co-relation queries the response was YES. [2023-11-19 07:47:50,841 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. [2023-11-19 07:47:50,990 INFO L140 encePairwiseOnDemand]: 642/645 looper letters, 76 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2023-11-19 07:47:50,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 105 transitions, 462 flow [2023-11-19 07:47:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:47:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:47:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3344 transitions. [2023-11-19 07:47:51,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320413436692506 [2023-11-19 07:47:51,003 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3344 transitions. [2023-11-19 07:47:51,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3344 transitions. [2023-11-19 07:47:51,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:51,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3344 transitions. [2023-11-19 07:47:51,015 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) [2023-11-19 07:47:51,029 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) [2023-11-19 07:47:51,031 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) [2023-11-19 07:47:51,032 INFO L175 Difference]: Start difference. First operand has 106 places, 99 transitions, 252 flow. Second operand 12 states and 3344 transitions. [2023-11-19 07:47:51,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 105 transitions, 462 flow [2023-11-19 07:47:51,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 105 transitions, 456 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:51,136 INFO L231 Difference]: Finished difference. Result has 121 places, 105 transitions, 330 flow [2023-11-19 07:47:51,136 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} [2023-11-19 07:47:51,137 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-11-19 07:47:51,137 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 105 transitions, 330 flow [2023-11-19 07:47:51,138 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) [2023-11-19 07:47:51,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:51,139 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:51,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:51,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b56cf3-6cff-4b78-b9a0-8215d4bc94bd/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:47:51,351 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)] === [2023-11-19 07:47:51,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:51,352 INFO L85 PathProgramCache]: Analyzing trace with hash 554120560, now seen corresponding path program 2 times [2023-11-19 07:47:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:51,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446024922] [2023-11-19 07:47:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:51,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:47:51,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:51,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446024922] [2023-11-19 07:47:51,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446024922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:51,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:51,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:47:51,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672454006] [2023-11-19 07:47:51,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:51,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:47:51,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:51,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:47:51,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30