./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.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_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/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_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/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_22674caa-b5c3-4319-ba73-f0286bda05fe/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 e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:58:32,059 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:58:32,182 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:58:32,195 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:58:32,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:58:32,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:58:32,240 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:58:32,241 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:58:32,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:58:32,248 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:58:32,249 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:58:32,250 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:58:32,251 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:58:32,253 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:58:32,253 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:58:32,254 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:58:32,254 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:58:32,255 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:58:32,255 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:58:32,256 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:58:32,257 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:58:32,257 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:58:32,258 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:58:32,259 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:58:32,259 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:58:32,260 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:58:32,261 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:58:32,261 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:58:32,262 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:58:32,262 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:58:32,264 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:58:32,264 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:58:32,265 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:58:32,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:58:32,265 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:58:32,266 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:58:32,266 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:58:32,266 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:58:32,267 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_22674caa-b5c3-4319-ba73-f0286bda05fe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a [2023-11-19 07:58:32,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:58:32,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:58:32,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:58:32,655 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:58:32,656 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:58:32,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2023-11-19 07:58:35,719 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:58:36,078 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:58:36,081 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2023-11-19 07:58:36,113 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/data/a55e4d0ad/67176485bd904538bba05c6005ea43d3/FLAG3f685acd6 [2023-11-19 07:58:36,132 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/data/a55e4d0ad/67176485bd904538bba05c6005ea43d3 [2023-11-19 07:58:36,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:58:36,145 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:58:36,151 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:58:36,151 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:58:36,157 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:58:36,158 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:36" (1/1) ... [2023-11-19 07:58:36,159 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29443862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:36, skipping insertion in model container [2023-11-19 07:58:36,159 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:36" (1/1) ... [2023-11-19 07:58:36,233 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:58:36,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:58:36,928 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:58:36,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:58:37,125 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:58:37,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37 WrapperNode [2023-11-19 07:58:37,126 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:58:37,127 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:58:37,127 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:58:37,128 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:58:37,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37" (1/1) ... [2023-11-19 07:58:37,190 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37" (1/1) ... [2023-11-19 07:58:37,224 INFO L138 Inliner]: procedures = 370, calls = 29, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 125 [2023-11-19 07:58:37,225 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:58:37,226 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:58:37,226 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:58:37,226 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:58:37,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37" (1/1) ... [2023-11-19 07:58:37,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37" (1/1) ... [2023-11-19 07:58:37,243 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37" (1/1) ... [2023-11-19 07:58:37,243 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37" (1/1) ... [2023-11-19 07:58:37,257 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37" (1/1) ... [2023-11-19 07:58:37,261 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37" (1/1) ... [2023-11-19 07:58:37,263 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37" (1/1) ... [2023-11-19 07:58:37,266 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37" (1/1) ... [2023-11-19 07:58:37,270 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:58:37,271 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:58:37,272 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:58:37,272 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:58:37,273 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37" (1/1) ... [2023-11-19 07:58:37,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:58:37,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:37,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:58:37,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:58:37,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:58:37,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:58:37,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:58:37,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:58:37,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:58:37,345 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:58:37,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:58:37,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:58:37,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:58:37,346 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:58:37,346 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:58:37,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:58:37,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:58:37,348 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 07:58:37,518 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:58:37,520 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:58:37,900 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:58:37,922 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:58:37,926 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:58:37,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:37 BoogieIcfgContainer [2023-11-19 07:58:37,934 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:58:37,939 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:58:37,940 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:58:37,943 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:58:37,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:58:36" (1/3) ... [2023-11-19 07:58:37,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7221b284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:37, skipping insertion in model container [2023-11-19 07:58:37,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:37" (2/3) ... [2023-11-19 07:58:37,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7221b284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:37, skipping insertion in model container [2023-11-19 07:58:37,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:37" (3/3) ... [2023-11-19 07:58:37,949 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_19-nested_nr.i [2023-11-19 07:58:37,965 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:58:37,966 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-19 07:58:37,966 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:58:38,090 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:58:38,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 192 transitions, 388 flow [2023-11-19 07:58:38,306 INFO L124 PetriNetUnfolderBase]: 6/191 cut-off events. [2023-11-19 07:58:38,307 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:58:38,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 191 events. 6/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 411 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-11-19 07:58:38,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 192 transitions, 388 flow [2023-11-19 07:58:38,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 191 transitions, 385 flow [2023-11-19 07:58:38,341 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:58:38,352 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 191 transitions, 385 flow [2023-11-19 07:58:38,355 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 191 transitions, 385 flow [2023-11-19 07:58:38,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 191 transitions, 385 flow [2023-11-19 07:58:38,395 INFO L124 PetriNetUnfolderBase]: 6/191 cut-off events. [2023-11-19 07:58:38,395 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:58:38,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 191 events. 6/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 412 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-11-19 07:58:38,400 INFO L119 LiptonReduction]: Number of co-enabled transitions 3192 [2023-11-19 07:59:01,515 WARN L293 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 179 DAG size of output: 169 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-19 07:59:09,751 INFO L134 LiptonReduction]: Checked pairs total: 10855 [2023-11-19 07:59:09,752 INFO L136 LiptonReduction]: Total number of compositions: 235 [2023-11-19 07:59:09,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:59:09,772 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;@4c4dd00f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:59:09,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-19 07:59:09,776 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:59:09,776 INFO L124 PetriNetUnfolderBase]: 2/5 cut-off events. [2023-11-19 07:59:09,777 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:59:09,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:09,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:59:09,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:59:09,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash 691988, now seen corresponding path program 1 times [2023-11-19 07:59:09,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:09,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608240691] [2023-11-19 07:59:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:09,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:10,072 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 07:59:10,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:10,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608240691] [2023-11-19 07:59:10,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608240691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:10,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:10,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:59:10,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254496617] [2023-11-19 07:59:10,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:10,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:10,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:10,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 427 [2023-11-19 07:59:10,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 07:59:10,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:10,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 427 [2023-11-19 07:59:10,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:10,444 INFO L124 PetriNetUnfolderBase]: 104/288 cut-off events. [2023-11-19 07:59:10,445 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:59:10,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 288 events. 104/288 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1352 event pairs, 102 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 504. Up to 238 conditions per place. [2023-11-19 07:59:10,453 INFO L140 encePairwiseOnDemand]: 406/427 looper letters, 32 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-19 07:59:10,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 161 flow [2023-11-19 07:59:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2023-11-19 07:59:10,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652615144418423 [2023-11-19 07:59:10,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2023-11-19 07:59:10,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2023-11-19 07:59:10,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:10,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2023-11-19 07:59:10,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 07:59:10,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states 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 07:59:10,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states 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 07:59:10,517 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 127 flow. Second operand 3 states and 596 transitions. [2023-11-19 07:59:10,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 161 flow [2023-11-19 07:59:10,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:10,524 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 102 flow [2023-11-19 07:59:10,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-19 07:59:10,532 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -16 predicate places. [2023-11-19 07:59:10,533 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 102 flow [2023-11-19 07:59:10,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 07:59:10,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:10,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:59:10,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:59:10,535 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:59:10,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:10,539 INFO L85 PathProgramCache]: Analyzing trace with hash 21385201, now seen corresponding path program 1 times [2023-11-19 07:59:10,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:10,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506519777] [2023-11-19 07:59:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:10,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:10,670 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 07:59:10,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:10,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506519777] [2023-11-19 07:59:10,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506519777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:10,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641668852] [2023-11-19 07:59:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:10,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:10,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:10,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:10,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:59:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:10,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:59:10,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:59:10,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:10,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641668852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:10,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:59:10,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-19 07:59:10,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462041971] [2023-11-19 07:59:10,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:10,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:10,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:10,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:10,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:59:10,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 427 [2023-11-19 07:59:10,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states 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 07:59:10,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:10,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 427 [2023-11-19 07:59:10,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:11,094 INFO L124 PetriNetUnfolderBase]: 104/291 cut-off events. [2023-11-19 07:59:11,095 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:59:11,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 291 events. 104/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1346 event pairs, 102 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 532. Up to 239 conditions per place. [2023-11-19 07:59:11,101 INFO L140 encePairwiseOnDemand]: 422/427 looper letters, 35 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-19 07:59:11,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 182 flow [2023-11-19 07:59:11,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:11,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 582 transitions. [2023-11-19 07:59:11,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45433255269320844 [2023-11-19 07:59:11,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 582 transitions. [2023-11-19 07:59:11,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 582 transitions. [2023-11-19 07:59:11,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:11,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 582 transitions. [2023-11-19 07:59:11,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:11,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states 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 07:59:11,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states 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 07:59:11,122 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 102 flow. Second operand 3 states and 582 transitions. [2023-11-19 07:59:11,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 182 flow [2023-11-19 07:59:11,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 178 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:11,133 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 114 flow [2023-11-19 07:59:11,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-19 07:59:11,134 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -14 predicate places. [2023-11-19 07:59:11,135 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 114 flow [2023-11-19 07:59:11,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states 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 07:59:11,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:11,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:59:11,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:11,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:11,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:59:11,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash 21385247, now seen corresponding path program 1 times [2023-11-19 07:59:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:11,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536280951] [2023-11-19 07:59:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:11,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:11,488 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 07:59:11,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:11,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536280951] [2023-11-19 07:59:11,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536280951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:11,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351362392] [2023-11-19 07:59:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:11,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:11,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:11,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:11,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:59:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:11,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:59:11,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:11,634 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 07:59:11,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:11,655 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 07:59:11,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351362392] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:11,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:11,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:59:11,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870838418] [2023-11-19 07:59:11,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:11,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:59:11,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:11,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:59:11,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:59:11,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 427 [2023-11-19 07:59:11,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 114 flow. Second operand has 7 states, 7 states have (on average 181.28571428571428) internal successors, (1269), 7 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states 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 07:59:11,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:11,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 427 [2023-11-19 07:59:11,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:12,051 INFO L124 PetriNetUnfolderBase]: 104/294 cut-off events. [2023-11-19 07:59:12,051 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:59:12,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 294 events. 104/294 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1358 event pairs, 102 based on Foata normal form. 3/211 useless extension candidates. Maximal degree in co-relation 532. Up to 241 conditions per place. [2023-11-19 07:59:12,053 INFO L140 encePairwiseOnDemand]: 424/427 looper letters, 33 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-19 07:59:12,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 202 flow [2023-11-19 07:59:12,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:59:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:59:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1120 transitions. [2023-11-19 07:59:12,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371584699453552 [2023-11-19 07:59:12,061 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1120 transitions. [2023-11-19 07:59:12,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1120 transitions. [2023-11-19 07:59:12,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:12,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1120 transitions. [2023-11-19 07:59:12,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.66666666666666) internal successors, (1120), 6 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states 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 07:59:12,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 427.0) internal successors, (2989), 7 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states 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 07:59:12,074 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 427.0) internal successors, (2989), 7 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states 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 07:59:12,075 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 114 flow. Second operand 6 states and 1120 transitions. [2023-11-19 07:59:12,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 202 flow [2023-11-19 07:59:12,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:12,078 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 148 flow [2023-11-19 07:59:12,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-11-19 07:59:12,080 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -7 predicate places. [2023-11-19 07:59:12,080 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 148 flow [2023-11-19 07:59:12,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 181.28571428571428) internal successors, (1269), 7 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states 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 07:59:12,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:12,082 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-19 07:59:12,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:12,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:12,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:59:12,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1365401218, now seen corresponding path program 2 times [2023-11-19 07:59:12,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:12,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133513048] [2023-11-19 07:59:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:12,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:12,452 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 07:59:12,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:12,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133513048] [2023-11-19 07:59:12,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133513048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:12,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529693050] [2023-11-19 07:59:12,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:59:12,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:12,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:12,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:12,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:59:12,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:59:12,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:12,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:59:12,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:12,704 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-19 07:59:12,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-19 07:59:12,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:59:12,736 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 07:59:12,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:12,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529693050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:12,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:59:12,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-19 07:59:12,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957844018] [2023-11-19 07:59:12,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:12,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:59:12,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:12,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:59:12,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:59:13,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 427 [2023-11-19 07:59:13,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 07:59:13,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:13,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 427 [2023-11-19 07:59:13,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:13,332 INFO L124 PetriNetUnfolderBase]: 99/285 cut-off events. [2023-11-19 07:59:13,332 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:59:13,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 285 events. 99/285 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1286 event pairs, 65 based on Foata normal form. 18/225 useless extension candidates. Maximal degree in co-relation 516. Up to 161 conditions per place. [2023-11-19 07:59:13,335 INFO L140 encePairwiseOnDemand]: 419/427 looper letters, 49 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2023-11-19 07:59:13,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 282 flow [2023-11-19 07:59:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:59:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:59:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 750 transitions. [2023-11-19 07:59:13,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43911007025761123 [2023-11-19 07:59:13,341 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 750 transitions. [2023-11-19 07:59:13,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 750 transitions. [2023-11-19 07:59:13,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:13,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 750 transitions. [2023-11-19 07:59:13,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 07:59:13,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 427.0) internal successors, (2135), 5 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states 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 07:59:13,355 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 427.0) internal successors, (2135), 5 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states 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 07:59:13,356 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 148 flow. Second operand 4 states and 750 transitions. [2023-11-19 07:59:13,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 282 flow [2023-11-19 07:59:13,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 266 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:13,360 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 146 flow [2023-11-19 07:59:13,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2023-11-19 07:59:13,363 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -5 predicate places. [2023-11-19 07:59:13,363 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 146 flow [2023-11-19 07:59:13,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 07:59:13,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:13,364 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-19 07:59:13,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:13,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:13,588 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:59:13,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:13,589 INFO L85 PathProgramCache]: Analyzing trace with hash -622233615, now seen corresponding path program 1 times [2023-11-19 07:59:13,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:13,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255907860] [2023-11-19 07:59:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:13,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:59:13,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:13,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255907860] [2023-11-19 07:59:13,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255907860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:13,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692894371] [2023-11-19 07:59:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:13,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:13,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:13,756 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:13,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:59:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:13,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:13,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:59:13,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:59:14,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692894371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:14,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:14,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 14 [2023-11-19 07:59:14,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690534263] [2023-11-19 07:59:14,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:14,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:59:14,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:14,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:59:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:59:14,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 427 [2023-11-19 07:59:14,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 146 flow. Second operand has 14 states, 14 states have (on average 177.35714285714286) internal successors, (2483), 14 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states 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 07:59:14,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:14,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 427 [2023-11-19 07:59:14,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:14,658 INFO L124 PetriNetUnfolderBase]: 99/285 cut-off events. [2023-11-19 07:59:14,658 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-11-19 07:59:14,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 285 events. 99/285 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1258 event pairs, 97 based on Foata normal form. 6/217 useless extension candidates. Maximal degree in co-relation 554. Up to 227 conditions per place. [2023-11-19 07:59:14,661 INFO L140 encePairwiseOnDemand]: 420/427 looper letters, 31 selfloop transitions, 14 changer transitions 0/55 dead transitions. [2023-11-19 07:59:14,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 55 transitions, 280 flow [2023-11-19 07:59:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:59:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:59:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2518 transitions. [2023-11-19 07:59:14,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212111073937772 [2023-11-19 07:59:14,673 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2518 transitions. [2023-11-19 07:59:14,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2518 transitions. [2023-11-19 07:59:14,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:14,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2518 transitions. [2023-11-19 07:59:14,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 179.85714285714286) internal successors, (2518), 14 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states 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 07:59:14,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 427.0) internal successors, (6405), 15 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states 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 07:59:14,699 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 427.0) internal successors, (6405), 15 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states 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 07:59:14,699 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 146 flow. Second operand 14 states and 2518 transitions. [2023-11-19 07:59:14,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 55 transitions, 280 flow [2023-11-19 07:59:14,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 55 transitions, 272 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:59:14,704 INFO L231 Difference]: Finished difference. Result has 70 places, 54 transitions, 218 flow [2023-11-19 07:59:14,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=218, PETRI_PLACES=70, PETRI_TRANSITIONS=54} [2023-11-19 07:59:14,706 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 6 predicate places. [2023-11-19 07:59:14,706 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 54 transitions, 218 flow [2023-11-19 07:59:14,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 177.35714285714286) internal successors, (2483), 14 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states 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 07:59:14,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:14,708 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-19 07:59:14,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:14,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:14,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:59:14,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:14,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1666307777, now seen corresponding path program 1 times [2023-11-19 07:59:14,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:14,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443374414] [2023-11-19 07:59:14,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:14,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:15,850 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 07:59:15,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:15,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443374414] [2023-11-19 07:59:15,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443374414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:15,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548466115] [2023-11-19 07:59:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:15,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:15,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:15,854 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:15,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:59:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:16,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 07:59:16,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:16,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:59:16,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:59:16,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:59:16,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:59:16,369 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-19 07:59:16,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:59:16,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:59:16,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:59:16,418 INFO L349 Elim1Store]: treesize reduction 55, result has 1.8 percent of original size [2023-11-19 07:59:16,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2023-11-19 07:59:16,442 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 07:59:16,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:19,143 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_#StackHeapBarrier| 1))) (and (forall ((|v_ULTIMATE.start_main_~#t1~0#1.base_47| Int)) (or (forall ((v_ArrVal_401 Int) (v_ArrVal_402 Int) (|v_ULTIMATE.start_new_#res#1.base_179| Int)) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_main_~#t1~0#1.base_47| v_ArrVal_402))) (or (not (= 0 (select .cse0 |v_ULTIMATE.start_new_#res#1.base_179|))) (forall ((v_ArrVal_403 Int)) (let ((.cse1 (store .cse0 |v_ULTIMATE.start_new_#res#1.base_179| v_ArrVal_403))) (or (not (= (select .cse1 |c_~#c~0.base|) 1)) (forall ((|v_ULTIMATE.start_new_#res#1.base_181| Int)) (or (forall ((|v_ULTIMATE.start_new_#res#1.base_180| Int) (v_ArrVal_406 Int) (v_ArrVal_405 Int) (v_ArrVal_404 Int)) (or (forall ((v_ArrVal_407 Int)) (<= (+ |c_~#c~0.offset| 8) (select (store (store (store (store |c_#length| |v_ULTIMATE.start_main_~#t1~0#1.base_47| v_ArrVal_401) |v_ULTIMATE.start_new_#res#1.base_179| v_ArrVal_405) |v_ULTIMATE.start_new_#res#1.base_181| v_ArrVal_404) |v_ULTIMATE.start_new_#res#1.base_180| v_ArrVal_407) |c_~#c~0.base|))) (= |v_ULTIMATE.start_new_#res#1.base_180| 0) (not (= (select (store .cse1 |v_ULTIMATE.start_new_#res#1.base_181| v_ArrVal_406) |v_ULTIMATE.start_new_#res#1.base_180|) 0)))) (not (= (select .cse1 |v_ULTIMATE.start_new_#res#1.base_181|) 0))))))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_179| 1))))) (< |v_ULTIMATE.start_main_~#t1~0#1.base_47| .cse2))) (or (forall ((|v_ULTIMATE.start_main_~#t1~0#1.base_47| Int) (|v_ULTIMATE.start_new_#res#1.base_181| Int) (|v_ULTIMATE.start_new_#res#1.base_180| Int) (v_ArrVal_406 Int) (v_ArrVal_403 Int) (v_ArrVal_402 Int) (|v_ULTIMATE.start_new_#res#1.base_179| Int)) (let ((.cse3 (store |c_#valid| |v_ULTIMATE.start_main_~#t1~0#1.base_47| v_ArrVal_402))) (let ((.cse4 (store .cse3 |v_ULTIMATE.start_new_#res#1.base_179| v_ArrVal_403))) (or (not (= 0 (select .cse3 |v_ULTIMATE.start_new_#res#1.base_179|))) (not (= (select .cse4 |c_~#c~0.base|) 1)) (not (= (select .cse4 |v_ULTIMATE.start_new_#res#1.base_181|) 0)) (< |v_ULTIMATE.start_main_~#t1~0#1.base_47| .cse2) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_179| 1)) (= |v_ULTIMATE.start_new_#res#1.base_180| 0) (not (= (select (store .cse4 |v_ULTIMATE.start_new_#res#1.base_181| v_ArrVal_406) |v_ULTIMATE.start_new_#res#1.base_180|) 0)))))) (< 0 (+ 5 |c_~#c~0.offset|))))) is different from false [2023-11-19 07:59:20,684 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 07:59:20,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548466115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:20,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:20,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-19 07:59:20,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498925121] [2023-11-19 07:59:20,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:20,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:59:20,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:20,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:59:20,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=66, Unknown=1, NotChecked=16, Total=110 [2023-11-19 07:59:20,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 427 [2023-11-19 07:59:20,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 54 transitions, 218 flow. Second operand has 11 states, 11 states have (on average 103.36363636363636) internal successors, (1137), 11 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states 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 07:59:20,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:20,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 427 [2023-11-19 07:59:20,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:22,152 INFO L124 PetriNetUnfolderBase]: 257/563 cut-off events. [2023-11-19 07:59:22,153 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-19 07:59:22,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 563 events. 257/563 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2558 event pairs, 183 based on Foata normal form. 2/312 useless extension candidates. Maximal degree in co-relation 1147. Up to 404 conditions per place. [2023-11-19 07:59:22,157 INFO L140 encePairwiseOnDemand]: 419/427 looper letters, 63 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2023-11-19 07:59:22,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 392 flow [2023-11-19 07:59:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:59:22,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:59:22,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 675 transitions. [2023-11-19 07:59:22,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26346604215456676 [2023-11-19 07:59:22,164 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 675 transitions. [2023-11-19 07:59:22,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 675 transitions. [2023-11-19 07:59:22,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:22,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 675 transitions. [2023-11-19 07:59:22,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states 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 07:59:22,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 427.0) internal successors, (2989), 7 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states 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 07:59:22,173 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 427.0) internal successors, (2989), 7 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states 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 07:59:22,174 INFO L175 Difference]: Start difference. First operand has 70 places, 54 transitions, 218 flow. Second operand 6 states and 675 transitions. [2023-11-19 07:59:22,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 392 flow [2023-11-19 07:59:22,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 318 flow, removed 26 selfloop flow, removed 11 redundant places. [2023-11-19 07:59:22,178 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 156 flow [2023-11-19 07:59:22,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2023-11-19 07:59:22,180 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -1 predicate places. [2023-11-19 07:59:22,180 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 156 flow [2023-11-19 07:59:22,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 103.36363636363636) internal successors, (1137), 11 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states 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 07:59:22,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:22,181 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1] [2023-11-19 07:59:22,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:22,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:22,403 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:59:22,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:22,404 INFO L85 PathProgramCache]: Analyzing trace with hash -115931948, now seen corresponding path program 2 times [2023-11-19 07:59:22,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:22,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306945239] [2023-11-19 07:59:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:22,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:59:22,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:22,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306945239] [2023-11-19 07:59:22,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306945239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:22,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456124818] [2023-11-19 07:59:22,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:59:22,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:22,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:22,652 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:22,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:59:22,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:59:22,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:22,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:59:22,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:59:22,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:59:22,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456124818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:22,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:22,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-19 07:59:22,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345195022] [2023-11-19 07:59:22,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:22,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:59:22,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:22,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:59:22,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:59:22,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 427 [2023-11-19 07:59:22,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 156 flow. Second operand has 9 states, 9 states have (on average 181.33333333333334) internal successors, (1632), 9 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 07:59:22,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:22,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 427 [2023-11-19 07:59:22,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:23,474 INFO L124 PetriNetUnfolderBase]: 99/287 cut-off events. [2023-11-19 07:59:23,475 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 07:59:23,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 287 events. 99/287 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1241 event pairs, 97 based on Foata normal form. 4/218 useless extension candidates. Maximal degree in co-relation 555. Up to 236 conditions per place. [2023-11-19 07:59:23,501 INFO L140 encePairwiseOnDemand]: 422/427 looper letters, 40 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2023-11-19 07:59:23,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 57 transitions, 274 flow [2023-11-19 07:59:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:59:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:59:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1489 transitions. [2023-11-19 07:59:23,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43588992974238877 [2023-11-19 07:59:23,507 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1489 transitions. [2023-11-19 07:59:23,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1489 transitions. [2023-11-19 07:59:23,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:23,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1489 transitions. [2023-11-19 07:59:23,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 186.125) internal successors, (1489), 8 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states 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 07:59:23,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 427.0) internal successors, (3843), 9 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states 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 07:59:23,521 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 427.0) internal successors, (3843), 9 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states 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 07:59:23,521 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 156 flow. Second operand 8 states and 1489 transitions. [2023-11-19 07:59:23,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 57 transitions, 274 flow [2023-11-19 07:59:23,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 57 transitions, 262 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:59:23,524 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 216 flow [2023-11-19 07:59:23,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=216, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2023-11-19 07:59:23,525 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 6 predicate places. [2023-11-19 07:59:23,526 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 216 flow [2023-11-19 07:59:23,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 181.33333333333334) internal successors, (1632), 9 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 07:59:23,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:23,527 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 6, 1, 1, 1] [2023-11-19 07:59:23,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:23,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:23,753 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:59:23,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:23,753 INFO L85 PathProgramCache]: Analyzing trace with hash -551042028, now seen corresponding path program 3 times [2023-11-19 07:59:23,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:23,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217431156] [2023-11-19 07:59:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:23,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:59:24,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:24,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217431156] [2023-11-19 07:59:24,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217431156] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:24,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782586286] [2023-11-19 07:59:24,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:59:24,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:24,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:24,255 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:24,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22674caa-b5c3-4319-ba73-f0286bda05fe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process