./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl --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 c488feb98493d291286969cd9fdbd15fc14c729caece3fe94bd3c70430190936 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:32:38,343 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:32:38,462 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:32:38,474 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:32:38,475 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:32:38,513 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:32:38,515 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:32:38,515 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:32:38,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:32:38,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:32:38,523 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:32:38,525 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:32:38,526 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:32:38,529 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:32:38,529 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:32:38,529 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:32:38,530 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:32:38,530 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:32:38,531 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:32:38,531 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:32:38,532 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:32:38,533 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:32:38,533 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:32:38,533 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:32:38,534 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:32:38,534 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:32:38,535 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:32:38,536 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:32:38,536 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:32:38,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:32:38,538 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:32:38,539 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:32:38,539 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:32:38,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:32:38,539 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:32:38,540 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:32:38,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:32:38,541 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:32:38,541 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_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c488feb98493d291286969cd9fdbd15fc14c729caece3fe94bd3c70430190936 [2023-11-12 02:32:38,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:32:38,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:32:38,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:32:38,844 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:32:38,845 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:32:38,846 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr-deref.i [2023-11-12 02:32:42,141 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:32:42,494 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:32:42,495 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr-deref.i [2023-11-12 02:32:42,517 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/data/aef787a58/9dada0f1665e4a74ba87e7e9d7c0fae3/FLAG0ff18d688 [2023-11-12 02:32:42,532 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/data/aef787a58/9dada0f1665e4a74ba87e7e9d7c0fae3 [2023-11-12 02:32:42,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:32:42,537 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:32:42,539 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:32:42,539 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:32:42,545 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:32:42,546 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:32:42" (1/1) ... [2023-11-12 02:32:42,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@150cc4e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:42, skipping insertion in model container [2023-11-12 02:32:42,547 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:32:42" (1/1) ... [2023-11-12 02:32:42,606 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:32:43,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:32:43,366 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:32:43,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:32:43,580 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:32:43,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43 WrapperNode [2023-11-12 02:32:43,580 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:32:43,582 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:32:43,582 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:32:43,582 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:32:43,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43" (1/1) ... [2023-11-12 02:32:43,626 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43" (1/1) ... [2023-11-12 02:32:43,657 INFO L138 Inliner]: procedures = 370, calls = 30, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 118 [2023-11-12 02:32:43,658 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:32:43,659 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:32:43,659 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:32:43,659 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:32:43,669 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43" (1/1) ... [2023-11-12 02:32:43,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43" (1/1) ... [2023-11-12 02:32:43,676 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43" (1/1) ... [2023-11-12 02:32:43,676 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43" (1/1) ... [2023-11-12 02:32:43,688 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43" (1/1) ... [2023-11-12 02:32:43,691 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43" (1/1) ... [2023-11-12 02:32:43,694 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43" (1/1) ... [2023-11-12 02:32:43,696 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43" (1/1) ... [2023-11-12 02:32:43,700 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:32:43,701 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:32:43,702 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:32:43,702 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:32:43,703 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43" (1/1) ... [2023-11-12 02:32:43,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:32:43,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:43,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:32:43,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:32:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:32:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:32:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:32:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:32:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:32:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:32:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:32:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:32:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:32:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 02:32:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 02:32:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:32:43,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:32:43,770 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:32:43,944 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:32:43,947 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:32:44,377 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:32:44,387 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:32:44,387 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:32:44,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:32:44 BoogieIcfgContainer [2023-11-12 02:32:44,389 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:32:44,400 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:32:44,401 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:32:44,405 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:32:44,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:32:42" (1/3) ... [2023-11-12 02:32:44,407 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b40efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:32:44, skipping insertion in model container [2023-11-12 02:32:44,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:43" (2/3) ... [2023-11-12 02:32:44,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b40efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:32:44, skipping insertion in model container [2023-11-12 02:32:44,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:32:44" (3/3) ... [2023-11-12 02:32:44,411 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr-deref.i [2023-11-12 02:32:44,428 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:32:44,429 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-12 02:32:44,429 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:32:44,561 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:32:44,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 186 transitions, 376 flow [2023-11-12 02:32:44,745 INFO L124 PetriNetUnfolderBase]: 4/185 cut-off events. [2023-11-12 02:32:44,745 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:44,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 185 events. 4/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 198 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2023-11-12 02:32:44,753 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 186 transitions, 376 flow [2023-11-12 02:32:44,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 185 transitions, 373 flow [2023-11-12 02:32:44,763 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:32:44,773 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 185 transitions, 373 flow [2023-11-12 02:32:44,776 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 185 transitions, 373 flow [2023-11-12 02:32:44,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 185 transitions, 373 flow [2023-11-12 02:32:44,824 INFO L124 PetriNetUnfolderBase]: 4/185 cut-off events. [2023-11-12 02:32:44,825 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:44,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 185 events. 4/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 198 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2023-11-12 02:32:44,829 INFO L119 LiptonReduction]: Number of co-enabled transitions 3192 [2023-11-12 02:33:18,645 WARN L293 SmtUtils]: Spent 11.59s on a formula simplification. DAG size of input: 227 DAG size of output: 209 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-12 02:33:30,693 WARN L293 SmtUtils]: Spent 8.62s on a formula simplification. DAG size of input: 232 DAG size of output: 214 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-12 02:33:33,648 INFO L134 LiptonReduction]: Checked pairs total: 13109 [2023-11-12 02:33:33,649 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-11-12 02:33:33,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:33:33,670 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;@2ca07996, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:33:33,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-12 02:33:33,673 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:33:33,674 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-12 02:33:33,674 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:33:33,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:33,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:33:33,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 02:33:33,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:33,681 INFO L85 PathProgramCache]: Analyzing trace with hash 21917, now seen corresponding path program 1 times [2023-11-12 02:33:33,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:33,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927847316] [2023-11-12 02:33:33,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:33,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:33,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:33,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927847316] [2023-11-12 02:33:33,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927847316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:33,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:33,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:33:33,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48147736] [2023-11-12 02:33:33,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:33,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:33,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:34,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:34,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:34,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 433 [2023-11-12 02:33:34,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:34,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:34,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 433 [2023-11-12 02:33:34,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:34,350 INFO L124 PetriNetUnfolderBase]: 209/484 cut-off events. [2023-11-12 02:33:34,351 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:33:34,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 484 events. 209/484 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2315 event pairs, 208 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 922. Up to 452 conditions per place. [2023-11-12 02:33:34,357 INFO L140 encePairwiseOnDemand]: 408/433 looper letters, 34 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-11-12 02:33:34,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 157 flow [2023-11-12 02:33:34,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:33:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-11-12 02:33:34,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657428791377983 [2023-11-12 02:33:34,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-11-12 02:33:34,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-11-12 02:33:34,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:34,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-11-12 02:33:34,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:34,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:34,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:34,402 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 123 flow. Second operand 3 states and 605 transitions. [2023-11-12 02:33:34,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 157 flow [2023-11-12 02:33:34,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:33:34,409 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 98 flow [2023-11-12 02:33:34,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-11-12 02:33:34,415 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -18 predicate places. [2023-11-12 02:33:34,415 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 98 flow [2023-11-12 02:33:34,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:34,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:34,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:33:34,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:33:34,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 02:33:34,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:34,418 INFO L85 PathProgramCache]: Analyzing trace with hash 678001, now seen corresponding path program 1 times [2023-11-12 02:33:34,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:34,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405326001] [2023-11-12 02:33:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:34,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:34,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:34,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405326001] [2023-11-12 02:33:34,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405326001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:34,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539026653] [2023-11-12 02:33:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:34,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:34,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:34,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:34,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:33:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:34,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:33:34,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:34,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:34,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539026653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:34,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:34,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-12 02:33:34,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511777197] [2023-11-12 02:33:34,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:34,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:33:34,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:34,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:33:34,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:33:34,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 433 [2023-11-12 02:33:34,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 98 flow. Second operand has 7 states, 7 states have (on average 176.14285714285714) internal successors, (1233), 7 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:34,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:34,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 433 [2023-11-12 02:33:34,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:35,265 INFO L124 PetriNetUnfolderBase]: 209/487 cut-off events. [2023-11-12 02:33:35,265 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:33:35,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 487 events. 209/487 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2319 event pairs, 208 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 947. Up to 452 conditions per place. [2023-11-12 02:33:35,270 INFO L140 encePairwiseOnDemand]: 428/433 looper letters, 34 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-11-12 02:33:35,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 188 flow [2023-11-12 02:33:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:33:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:33:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1098 transitions. [2023-11-12 02:33:35,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226327944572748 [2023-11-12 02:33:35,277 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1098 transitions. [2023-11-12 02:33:35,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1098 transitions. [2023-11-12 02:33:35,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:35,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1098 transitions. [2023-11-12 02:33:35,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:35,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 433.0) internal successors, (3031), 7 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:35,293 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 433.0) internal successors, (3031), 7 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:35,294 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 98 flow. Second operand 6 states and 1098 transitions. [2023-11-12 02:33:35,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 188 flow [2023-11-12 02:33:35,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 44 transitions, 184 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:33:35,297 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 142 flow [2023-11-12 02:33:35,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2023-11-12 02:33:35,298 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -11 predicate places. [2023-11-12 02:33:35,298 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 142 flow [2023-11-12 02:33:35,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 176.14285714285714) internal successors, (1233), 7 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:35,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:35,300 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-12 02:33:35,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:35,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:35,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 02:33:35,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:35,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1277924707, now seen corresponding path program 2 times [2023-11-12 02:33:35,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:35,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502538796] [2023-11-12 02:33:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:35,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:35,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:35,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502538796] [2023-11-12 02:33:35,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502538796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:35,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979403399] [2023-11-12 02:33:35,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:33:35,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:35,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:35,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:35,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:33:35,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:33:35,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:33:35,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:33:35,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:33:35,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:35,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979403399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:35,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:33:35,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-12 02:33:35,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336653607] [2023-11-12 02:33:35,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:35,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:35,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:35,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:35,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:33:35,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 433 [2023-11-12 02:33:35,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:35,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:35,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 433 [2023-11-12 02:33:35,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:36,239 INFO L124 PetriNetUnfolderBase]: 196/446 cut-off events. [2023-11-12 02:33:36,239 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:33:36,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 446 events. 196/446 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2070 event pairs, 131 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 872. Up to 289 conditions per place. [2023-11-12 02:33:36,243 INFO L140 encePairwiseOnDemand]: 428/433 looper letters, 52 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-11-12 02:33:36,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 270 flow [2023-11-12 02:33:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:33:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-11-12 02:33:36,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44957659738260203 [2023-11-12 02:33:36,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-11-12 02:33:36,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-11-12 02:33:36,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:36,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-11-12 02:33:36,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:36,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:36,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:36,257 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 142 flow. Second operand 3 states and 584 transitions. [2023-11-12 02:33:36,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 270 flow [2023-11-12 02:33:36,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 256 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-12 02:33:36,260 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 124 flow [2023-11-12 02:33:36,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-11-12 02:33:36,262 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -11 predicate places. [2023-11-12 02:33:36,262 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 124 flow [2023-11-12 02:33:36,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:36,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:36,263 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-12 02:33:36,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:36,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:36,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 02:33:36,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:36,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1277924706, now seen corresponding path program 1 times [2023-11-12 02:33:36,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:36,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766439069] [2023-11-12 02:33:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:36,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:36,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:36,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766439069] [2023-11-12 02:33:36,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766439069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:36,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741959948] [2023-11-12 02:33:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:36,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:36,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:36,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:36,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:33:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:36,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:33:36,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:36,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:36,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741959948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:36,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:36,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:33:36,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130075907] [2023-11-12 02:33:36,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:36,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:33:36,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:36,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:33:36,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:33:36,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 433 [2023-11-12 02:33:36,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 124 flow. Second operand has 13 states, 13 states have (on average 176.07692307692307) internal successors, (2289), 13 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:36,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:36,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 433 [2023-11-12 02:33:36,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:37,299 INFO L124 PetriNetUnfolderBase]: 193/449 cut-off events. [2023-11-12 02:33:37,299 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-12 02:33:37,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 950 conditions, 449 events. 193/449 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2025 event pairs, 192 based on Foata normal form. 6/293 useless extension candidates. Maximal degree in co-relation 897. Up to 418 conditions per place. [2023-11-12 02:33:37,304 INFO L140 encePairwiseOnDemand]: 429/433 looper letters, 32 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2023-11-12 02:33:37,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 48 transitions, 246 flow [2023-11-12 02:33:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:33:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:33:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2155 transitions. [2023-11-12 02:33:37,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147421093148576 [2023-11-12 02:33:37,314 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2155 transitions. [2023-11-12 02:33:37,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2155 transitions. [2023-11-12 02:33:37,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:37,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2155 transitions. [2023-11-12 02:33:37,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 179.58333333333334) internal successors, (2155), 12 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:37,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 433.0) internal successors, (5629), 13 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:37,340 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 433.0) internal successors, (5629), 13 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:37,341 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 124 flow. Second operand 12 states and 2155 transitions. [2023-11-12 02:33:37,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 48 transitions, 246 flow [2023-11-12 02:33:37,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 48 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:33:37,344 INFO L231 Difference]: Finished difference. Result has 67 places, 48 transitions, 216 flow [2023-11-12 02:33:37,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=67, PETRI_TRANSITIONS=48} [2023-11-12 02:33:37,346 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2023-11-12 02:33:37,346 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 48 transitions, 216 flow [2023-11-12 02:33:37,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 176.07692307692307) internal successors, (2289), 13 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:37,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:37,348 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-12 02:33:37,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:37,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba47288-78a0-43bb-bcb3-68c531a98797/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:37,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 02:33:37,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:37,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2014566942, now seen corresponding path program 2 times [2023-11-12 02:33:37,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:37,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576922209] [2023-11-12 02:33:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:37,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 02:33:37,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:37,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576922209] [2023-11-12 02:33:37,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576922209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:37,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:37,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:33:37,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625038239] [2023-11-12 02:33:37,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:37,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:37,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:37,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:37,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:38,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 433 [2023-11-12 02:33:38,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:38,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:38,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 433 [2023-11-12 02:33:38,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:38,323 INFO L124 PetriNetUnfolderBase]: 196/451 cut-off events. [2023-11-12 02:33:38,323 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-12 02:33:38,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 451 events. 196/451 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2064 event pairs, 131 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 893. Up to 294 conditions per place. [2023-11-12 02:33:38,328 INFO L140 encePairwiseOnDemand]: 430/433 looper letters, 57 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-12 02:33:38,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 63 transitions, 344 flow [2023-11-12 02:33:38,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:33:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2023-11-12 02:33:38,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4472671285604311 [2023-11-12 02:33:38,332 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2023-11-12 02:33:38,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2023-11-12 02:33:38,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:38,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2023-11-12 02:33:38,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:38,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:38,339 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:38,339 INFO L175 Difference]: Start difference. First operand has 67 places, 48 transitions, 216 flow. Second operand 3 states and 581 transitions. [2023-11-12 02:33:38,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 63 transitions, 344 flow [2023-11-12 02:33:38,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 296 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-12 02:33:38,344 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 150 flow [2023-11-12 02:33:38,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2023-11-12 02:33:38,345 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-11-12 02:33:38,346 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 150 flow [2023-11-12 02:33:38,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:38,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:38,347 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-12 02:33:38,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:33:38,347 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 02:33:38,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:38,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1908355158, now seen corresponding path program 1 times [2023-11-12 02:33:38,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:38,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049543142] [2023-11-12 02:33:38,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:38,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 02:33:38,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:38,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049543142] [2023-11-12 02:33:38,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049543142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:38,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:38,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:33:38,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880933263] [2023-11-12 02:33:38,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:38,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:38,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:38,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:38,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 433 [2023-11-12 02:33:38,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:38,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:38,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 433 [2023-11-12 02:33:38,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:39,006 INFO L124 PetriNetUnfolderBase]: 317/744 cut-off events. [2023-11-12 02:33:39,006 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-11-12 02:33:39,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 744 events. 317/744 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4428 event pairs, 38 based on Foata normal form. 0/462 useless extension candidates. Maximal degree in co-relation 1483. Up to 390 conditions per place. [2023-11-12 02:33:39,013 INFO L140 encePairwiseOnDemand]: 428/433 looper letters, 65 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2023-11-12 02:33:39,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 74 transitions, 345 flow [2023-11-12 02:33:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:33:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-11-12 02:33:39,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341801385681293 [2023-11-12 02:33:39,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-11-12 02:33:39,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-11-12 02:33:39,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:39,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-11-12 02:33:39,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:39,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:39,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:39,024 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 150 flow. Second operand 3 states and 564 transitions. [2023-11-12 02:33:39,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 74 transitions, 345 flow [2023-11-12 02:33:39,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 339 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:33:39,029 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 176 flow [2023-11-12 02:33:39,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2023-11-12 02:33:39,030 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-11-12 02:33:39,030 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 176 flow [2023-11-12 02:33:39,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:39,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:39,031 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:39,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:33:39,031 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 02:33:39,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash 970532451, now seen corresponding path program 1 times [2023-11-12 02:33:39,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:39,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091121749] [2023-11-12 02:33:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:39,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 02:33:39,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:39,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091121749] [2023-11-12 02:33:39,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091121749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:39,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:39,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:33:39,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67737271] [2023-11-12 02:33:39,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:39,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:33:39,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:39,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:33:39,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:33:40,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 433 [2023-11-12 02:33:40,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 157.4) internal successors, (787), 5 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:40,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:40,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 433 [2023-11-12 02:33:40,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand