./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:30:26,508 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:30:26,631 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:30:26,646 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:30:26,646 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:30:26,685 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:30:26,686 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:30:26,686 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:30:26,688 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:30:26,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:30:26,694 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:30:26,694 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:30:26,695 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:30:26,697 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:30:26,697 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:30:26,698 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:30:26,698 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:30:26,699 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:30:26,699 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:30:26,700 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:30:26,700 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:30:26,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:30:26,701 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:30:26,702 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:30:26,702 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:30:26,702 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:30:26,704 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:30:26,704 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:30:26,704 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:30:26,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:30:26,706 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:30:26,707 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:30:26,707 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:30:26,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:30:26,708 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:30:26,708 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:30:26,708 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:30:26,708 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:30:26,709 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_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 [2023-11-06 22:30:27,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:30:27,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:30:27,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:30:27,076 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:30:27,077 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:30:27,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-06 22:30:30,137 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:30:30,394 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:30:30,399 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-06 22:30:30,415 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/data/99aef2825/01db7351495f49f18131f3b3a6c856ca/FLAG268431a6c [2023-11-06 22:30:30,440 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/data/99aef2825/01db7351495f49f18131f3b3a6c856ca [2023-11-06 22:30:30,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:30:30,452 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:30:30,456 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:30:30,457 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:30:30,462 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:30:30,463 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:30" (1/1) ... [2023-11-06 22:30:30,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eecc6dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:30, skipping insertion in model container [2023-11-06 22:30:30,464 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:30" (1/1) ... [2023-11-06 22:30:30,534 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:30:30,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:30:30,945 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:30:30,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:30:31,035 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:30:31,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31 WrapperNode [2023-11-06 22:30:31,035 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:30:31,037 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:30:31,037 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:30:31,037 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:30:31,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:31,060 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:31,086 INFO L138 Inliner]: procedures = 170, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 100 [2023-11-06 22:30:31,087 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:30:31,087 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:30:31,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:30:31,088 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:30:31,097 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:31,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:31,101 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:31,101 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:31,109 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:31,114 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:31,116 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:31,132 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:31,136 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:30:31,137 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:30:31,137 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:30:31,137 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:30:31,138 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:31,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:30:31,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:31,187 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:30:31,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:30:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:30:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:30:31,225 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:30:31,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:30:31,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:30:31,226 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:30:31,226 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:30:31,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:30:31,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:30:31,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:30:31,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:30:31,229 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:30:31,439 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:30:31,443 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:30:31,829 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:30:31,842 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:30:31,842 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-06 22:30:31,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:31 BoogieIcfgContainer [2023-11-06 22:30:31,846 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:30:31,849 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:30:31,849 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:30:31,852 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:30:31,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:30" (1/3) ... [2023-11-06 22:30:31,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1251c85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:31, skipping insertion in model container [2023-11-06 22:30:31,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (2/3) ... [2023-11-06 22:30:31,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1251c85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:31, skipping insertion in model container [2023-11-06 22:30:31,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:31" (3/3) ... [2023-11-06 22:30:31,859 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-11-06 22:30:31,880 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:30:31,881 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-06 22:30:31,881 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:30:31,974 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:30:32,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 141 transitions, 289 flow [2023-11-06 22:30:32,190 INFO L124 PetriNetUnfolderBase]: 32/213 cut-off events. [2023-11-06 22:30:32,191 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:30:32,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 213 events. 32/213 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 715 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 108. Up to 6 conditions per place. [2023-11-06 22:30:32,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 141 transitions, 289 flow [2023-11-06 22:30:32,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 141 transitions, 289 flow [2023-11-06 22:30:32,220 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:30:32,243 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 141 transitions, 289 flow [2023-11-06 22:30:32,246 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 141 transitions, 289 flow [2023-11-06 22:30:32,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 141 transitions, 289 flow [2023-11-06 22:30:32,293 INFO L124 PetriNetUnfolderBase]: 32/213 cut-off events. [2023-11-06 22:30:32,293 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:30:32,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 213 events. 32/213 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 715 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 108. Up to 6 conditions per place. [2023-11-06 22:30:32,300 INFO L119 LiptonReduction]: Number of co-enabled transitions 4836 [2023-11-06 22:30:35,661 INFO L134 LiptonReduction]: Checked pairs total: 13634 [2023-11-06 22:30:35,662 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-11-06 22:30:35,691 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:30:35,700 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;@40873475, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:30:35,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 22:30:35,704 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:30:35,705 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:30:35,705 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:30:35,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:35,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:30:35,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:30:35,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:35,717 INFO L85 PathProgramCache]: Analyzing trace with hash 17194, now seen corresponding path program 1 times [2023-11-06 22:30:35,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:35,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763241345] [2023-11-06 22:30:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:35,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:35,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:35,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763241345] [2023-11-06 22:30:35,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763241345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:35,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:35,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:30:35,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310213739] [2023-11-06 22:30:35,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:36,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:36,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:36,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:36,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:36,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 254 [2023-11-06 22:30:36,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 63 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:36,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 254 [2023-11-06 22:30:36,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:36,281 INFO L124 PetriNetUnfolderBase]: 212/509 cut-off events. [2023-11-06 22:30:36,281 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:30:36,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 509 events. 212/509 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2344 event pairs, 171 based on Foata normal form. 98/504 useless extension candidates. Maximal degree in co-relation 911. Up to 412 conditions per place. [2023-11-06 22:30:36,290 INFO L140 encePairwiseOnDemand]: 233/254 looper letters, 41 selfloop transitions, 2 changer transitions 2/54 dead transitions. [2023-11-06 22:30:36,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 205 flow [2023-11-06 22:30:36,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:30:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-11-06 22:30:36,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275590551181102 [2023-11-06 22:30:36,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-11-06 22:30:36,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-11-06 22:30:36,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:36,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-11-06 22:30:36,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,327 INFO L175 Difference]: Start difference. First operand has 48 places, 63 transitions, 133 flow. Second operand 3 states and 402 transitions. [2023-11-06 22:30:36,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 205 flow [2023-11-06 22:30:36,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:30:36,334 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 95 flow [2023-11-06 22:30:36,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-06 22:30:36,340 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2023-11-06 22:30:36,341 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 95 flow [2023-11-06 22:30:36,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:36,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:30:36,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:30:36,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:30:36,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:36,344 INFO L85 PathProgramCache]: Analyzing trace with hash 17193, now seen corresponding path program 1 times [2023-11-06 22:30:36,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:36,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100338824] [2023-11-06 22:30:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:36,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:36,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:36,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100338824] [2023-11-06 22:30:36,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100338824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:36,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:36,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:30:36,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299335359] [2023-11-06 22:30:36,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:36,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:36,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:36,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:36,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:36,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 254 [2023-11-06 22:30:36,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:36,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 254 [2023-11-06 22:30:36,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:36,834 INFO L124 PetriNetUnfolderBase]: 191/443 cut-off events. [2023-11-06 22:30:36,835 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:30:36,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 443 events. 191/443 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1954 event pairs, 90 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 829. Up to 386 conditions per place. [2023-11-06 22:30:36,839 INFO L140 encePairwiseOnDemand]: 250/254 looper letters, 42 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-11-06 22:30:36,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 205 flow [2023-11-06 22:30:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:36,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:30:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-11-06 22:30:36,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505249343832021 [2023-11-06 22:30:36,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-11-06 22:30:36,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-11-06 22:30:36,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:36,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-11-06 22:30:36,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,855 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,856 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 95 flow. Second operand 3 states and 385 transitions. [2023-11-06 22:30:36,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 205 flow [2023-11-06 22:30:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:30:36,859 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 101 flow [2023-11-06 22:30:36,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=101, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-11-06 22:30:36,861 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2023-11-06 22:30:36,861 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 101 flow [2023-11-06 22:30:36,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:36,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:30:36,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:30:36,863 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:30:36,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:36,863 INFO L85 PathProgramCache]: Analyzing trace with hash 512650832, now seen corresponding path program 1 times [2023-11-06 22:30:36,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:36,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670107671] [2023-11-06 22:30:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:36,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:37,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:37,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670107671] [2023-11-06 22:30:37,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670107671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:37,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865921141] [2023-11-06 22:30:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:37,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:37,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:37,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:37,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:30:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:37,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:30:37,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:37,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:30:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:37,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:37,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865921141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:37,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:37,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-06 22:30:37,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972187348] [2023-11-06 22:30:37,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:37,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:30:37,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:30:37,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:30:37,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 254 [2023-11-06 22:30:37,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 101 flow. Second operand has 8 states, 8 states have (on average 110.875) internal successors, (887), 8 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:37,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:37,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 254 [2023-11-06 22:30:37,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:37,702 INFO L124 PetriNetUnfolderBase]: 21/68 cut-off events. [2023-11-06 22:30:37,703 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-06 22:30:37,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 68 events. 21/68 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 173 event pairs, 0 based on Foata normal form. 10/74 useless extension candidates. Maximal degree in co-relation 125. Up to 40 conditions per place. [2023-11-06 22:30:37,704 INFO L140 encePairwiseOnDemand]: 250/254 looper letters, 23 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-11-06 22:30:37,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 31 transitions, 122 flow [2023-11-06 22:30:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:30:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:30:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2023-11-06 22:30:37,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45570866141732286 [2023-11-06 22:30:37,707 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2023-11-06 22:30:37,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2023-11-06 22:30:37,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:37,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2023-11-06 22:30:37,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:37,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:37,713 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:37,714 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 101 flow. Second operand 4 states and 463 transitions. [2023-11-06 22:30:37,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 31 transitions, 122 flow [2023-11-06 22:30:37,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 31 transitions, 116 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:30:37,716 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 48 flow [2023-11-06 22:30:37,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-11-06 22:30:37,717 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -23 predicate places. [2023-11-06 22:30:37,717 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 48 flow [2023-11-06 22:30:37,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 110.875) internal successors, (887), 8 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:37,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:37,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:30:37,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:30:37,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:37,924 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:30:37,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:37,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1287692937, now seen corresponding path program 1 times [2023-11-06 22:30:37,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:37,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523208026] [2023-11-06 22:30:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:37,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:30:37,943 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:30:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:30:37,972 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:30:37,972 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:30:37,974 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-06 22:30:37,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-06 22:30:37,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-06 22:30:37,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-06 22:30:37,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-06 22:30:37,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-06 22:30:37,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-06 22:30:37,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:30:37,978 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-06 22:30:37,991 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:30:37,991 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:30:38,024 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:30:38,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 174 transitions, 364 flow [2023-11-06 22:30:38,084 INFO L124 PetriNetUnfolderBase]: 54/349 cut-off events. [2023-11-06 22:30:38,085 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:30:38,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 349 events. 54/349 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1314 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 215. Up to 9 conditions per place. [2023-11-06 22:30:38,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 174 transitions, 364 flow [2023-11-06 22:30:38,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 174 transitions, 364 flow [2023-11-06 22:30:38,094 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:30:38,095 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 174 transitions, 364 flow [2023-11-06 22:30:38,095 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 174 transitions, 364 flow [2023-11-06 22:30:38,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 174 transitions, 364 flow [2023-11-06 22:30:38,142 INFO L124 PetriNetUnfolderBase]: 54/349 cut-off events. [2023-11-06 22:30:38,143 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:30:38,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 349 events. 54/349 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1314 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 215. Up to 9 conditions per place. [2023-11-06 22:30:38,159 INFO L119 LiptonReduction]: Number of co-enabled transitions 12276 [2023-11-06 22:30:41,402 INFO L134 LiptonReduction]: Checked pairs total: 36683 [2023-11-06 22:30:41,402 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-11-06 22:30:41,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:30:41,407 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;@40873475, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:30:41,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 22:30:41,409 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:30:41,409 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-06 22:30:41,409 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:30:41,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:41,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:30:41,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:30:41,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:41,410 INFO L85 PathProgramCache]: Analyzing trace with hash 27885, now seen corresponding path program 1 times [2023-11-06 22:30:41,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:41,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497176007] [2023-11-06 22:30:41,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:41,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:41,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:41,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497176007] [2023-11-06 22:30:41,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497176007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:41,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:41,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:30:41,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924959828] [2023-11-06 22:30:41,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:41,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:41,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:41,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:41,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:41,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 301 [2023-11-06 22:30:41,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 88 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:41,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:41,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 301 [2023-11-06 22:30:41,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:42,465 INFO L124 PetriNetUnfolderBase]: 4040/6623 cut-off events. [2023-11-06 22:30:42,466 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-06 22:30:42,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12913 conditions, 6623 events. 4040/6623 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 42729 event pairs, 3034 based on Foata normal form. 1638/7148 useless extension candidates. Maximal degree in co-relation 4339. Up to 6229 conditions per place. [2023-11-06 22:30:42,519 INFO L140 encePairwiseOnDemand]: 275/301 looper letters, 54 selfloop transitions, 2 changer transitions 2/76 dead transitions. [2023-11-06 22:30:42,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 284 flow [2023-11-06 22:30:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:30:42,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-11-06 22:30:42,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559246954595792 [2023-11-06 22:30:42,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-11-06 22:30:42,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-11-06 22:30:42,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:42,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-11-06 22:30:42,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:42,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:42,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:42,529 INFO L175 Difference]: Start difference. First operand has 67 places, 88 transitions, 192 flow. Second operand 3 states and 502 transitions. [2023-11-06 22:30:42,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 284 flow [2023-11-06 22:30:42,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:30:42,532 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 156 flow [2023-11-06 22:30:42,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-11-06 22:30:42,534 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2023-11-06 22:30:42,534 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 156 flow [2023-11-06 22:30:42,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:42,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:42,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:30:42,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:30:42,535 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:30:42,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash 27884, now seen corresponding path program 1 times [2023-11-06 22:30:42,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:42,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482317357] [2023-11-06 22:30:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:42,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:42,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:42,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482317357] [2023-11-06 22:30:42,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482317357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:42,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:42,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:30:42,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339867864] [2023-11-06 22:30:42,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:42,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:42,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:42,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:42,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 301 [2023-11-06 22:30:42,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:42,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:42,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 301 [2023-11-06 22:30:42,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:43,346 INFO L124 PetriNetUnfolderBase]: 3348/5558 cut-off events. [2023-11-06 22:30:43,346 INFO L125 PetriNetUnfolderBase]: For 217/217 co-relation queries the response was YES. [2023-11-06 22:30:43,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11056 conditions, 5558 events. 3348/5558 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 35354 event pairs, 2795 based on Foata normal form. 0/4937 useless extension candidates. Maximal degree in co-relation 10985. Up to 4896 conditions per place. [2023-11-06 22:30:43,392 INFO L140 encePairwiseOnDemand]: 297/301 looper letters, 60 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-11-06 22:30:43,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 312 flow [2023-11-06 22:30:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:30:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-11-06 22:30:43,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521594684385382 [2023-11-06 22:30:43,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-11-06 22:30:43,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-11-06 22:30:43,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:43,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-11-06 22:30:43,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:43,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:43,402 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:43,402 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 156 flow. Second operand 3 states and 471 transitions. [2023-11-06 22:30:43,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 312 flow [2023-11-06 22:30:43,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:30:43,409 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 154 flow [2023-11-06 22:30:43,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-11-06 22:30:43,412 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2023-11-06 22:30:43,415 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 154 flow [2023-11-06 22:30:43,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:43,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:43,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:30:43,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:30:43,417 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:30:43,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash 5264164, now seen corresponding path program 1 times [2023-11-06 22:30:43,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:43,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232229853] [2023-11-06 22:30:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:43,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:43,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232229853] [2023-11-06 22:30:43,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232229853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:43,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638747488] [2023-11-06 22:30:43,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:43,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:43,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:43,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:43,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:30:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:43,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:30:43,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:43,682 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:30:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:43,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:43,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638747488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:43,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:43,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:30:43,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107492857] [2023-11-06 22:30:43,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:43,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:30:43,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:43,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:30:43,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:30:43,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 301 [2023-11-06 22:30:43,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 154 flow. Second operand has 7 states, 7 states have (on average 136.71428571428572) internal successors, (957), 7 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:43,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:43,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 301 [2023-11-06 22:30:43,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:44,724 INFO L124 PetriNetUnfolderBase]: 3076/5101 cut-off events. [2023-11-06 22:30:44,725 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2023-11-06 22:30:44,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10139 conditions, 5101 events. 3076/5101 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 32181 event pairs, 96 based on Foata normal form. 8/4757 useless extension candidates. Maximal degree in co-relation 9476. Up to 4027 conditions per place. [2023-11-06 22:30:44,781 INFO L140 encePairwiseOnDemand]: 297/301 looper letters, 85 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-11-06 22:30:44,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 420 flow [2023-11-06 22:30:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:30:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:30:44,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 767 transitions. [2023-11-06 22:30:44,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096345514950166 [2023-11-06 22:30:44,785 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 767 transitions. [2023-11-06 22:30:44,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 767 transitions. [2023-11-06 22:30:44,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:44,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 767 transitions. [2023-11-06 22:30:44,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.4) internal successors, (767), 5 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:44,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:44,796 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:44,796 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 154 flow. Second operand 5 states and 767 transitions. [2023-11-06 22:30:44,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 420 flow [2023-11-06 22:30:44,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 107 transitions, 416 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:30:44,809 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 154 flow [2023-11-06 22:30:44,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-11-06 22:30:44,811 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2023-11-06 22:30:44,811 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 154 flow [2023-11-06 22:30:44,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 136.71428571428572) internal successors, (957), 7 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:44,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:44,812 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:30:44,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:45,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:45,018 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:30:45,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1152217108, now seen corresponding path program 1 times [2023-11-06 22:30:45,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:45,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142326293] [2023-11-06 22:30:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:45,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:30:45,042 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:30:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:30:45,073 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:30:45,073 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:30:45,073 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-06 22:30:45,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-06 22:30:45,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-06 22:30:45,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-06 22:30:45,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-06 22:30:45,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-06 22:30:45,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-06 22:30:45,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:30:45,075 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-06 22:30:45,076 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:30:45,076 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:30:45,108 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:30:45,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 207 transitions, 441 flow [2023-11-06 22:30:45,202 INFO L124 PetriNetUnfolderBase]: 81/530 cut-off events. [2023-11-06 22:30:45,203 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:30:45,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 530 events. 81/530 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2165 event pairs, 1 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 357. Up to 16 conditions per place. [2023-11-06 22:30:45,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 207 transitions, 441 flow [2023-11-06 22:30:45,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 207 transitions, 441 flow [2023-11-06 22:30:45,212 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:30:45,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 207 transitions, 441 flow [2023-11-06 22:30:45,213 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 207 transitions, 441 flow [2023-11-06 22:30:45,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 207 transitions, 441 flow [2023-11-06 22:30:45,349 INFO L124 PetriNetUnfolderBase]: 81/530 cut-off events. [2023-11-06 22:30:45,349 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:30:45,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 530 events. 81/530 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2165 event pairs, 1 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 357. Up to 16 conditions per place. [2023-11-06 22:30:45,378 INFO L119 LiptonReduction]: Number of co-enabled transitions 21576 [2023-11-06 22:30:48,798 INFO L134 LiptonReduction]: Checked pairs total: 69912 [2023-11-06 22:30:48,799 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-11-06 22:30:48,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:30:48,803 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;@40873475, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:30:48,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 22:30:48,806 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:30:48,807 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:30:48,807 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:30:48,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:48,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:30:48,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:30:48,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:48,808 INFO L85 PathProgramCache]: Analyzing trace with hash 40099, now seen corresponding path program 1 times [2023-11-06 22:30:48,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:48,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482513411] [2023-11-06 22:30:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:48,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:48,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:48,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482513411] [2023-11-06 22:30:48,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482513411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:48,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:48,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:30:48,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713749106] [2023-11-06 22:30:48,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:48,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:48,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:48,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:48,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 349 [2023-11-06 22:30:48,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 111 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:48,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:48,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 349 [2023-11-06 22:30:48,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:55,921 INFO L124 PetriNetUnfolderBase]: 42499/62828 cut-off events. [2023-11-06 22:30:55,922 INFO L125 PetriNetUnfolderBase]: For 867/867 co-relation queries the response was YES. [2023-11-06 22:30:55,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121191 conditions, 62828 events. 42499/62828 cut-off events. For 867/867 co-relation queries the response was YES. Maximal size of possible extension queue 1772. Compared 479932 event pairs, 33409 based on Foata normal form. 12098/68545 useless extension candidates. Maximal degree in co-relation 19531. Up to 51857 conditions per place. [2023-11-06 22:30:56,301 INFO L140 encePairwiseOnDemand]: 316/349 looper letters, 75 selfloop transitions, 2 changer transitions 2/105 dead transitions. [2023-11-06 22:30:56,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 105 transitions, 395 flow [2023-11-06 22:30:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:30:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 610 transitions. [2023-11-06 22:30:56,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826170009551098 [2023-11-06 22:30:56,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 610 transitions. [2023-11-06 22:30:56,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 610 transitions. [2023-11-06 22:30:56,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:56,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 610 transitions. [2023-11-06 22:30:56,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,311 INFO L175 Difference]: Start difference. First operand has 84 places, 111 transitions, 249 flow. Second operand 3 states and 610 transitions. [2023-11-06 22:30:56,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 105 transitions, 395 flow [2023-11-06 22:30:56,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 105 transitions, 395 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:30:56,315 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 187 flow [2023-11-06 22:30:56,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=187, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2023-11-06 22:30:56,317 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2023-11-06 22:30:56,317 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 187 flow [2023-11-06 22:30:56,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:56,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:30:56,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:30:56,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:30:56,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:56,320 INFO L85 PathProgramCache]: Analyzing trace with hash 40100, now seen corresponding path program 1 times [2023-11-06 22:30:56,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:56,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576377770] [2023-11-06 22:30:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:56,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:56,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:56,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576377770] [2023-11-06 22:30:56,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576377770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:56,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:56,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:30:56,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001109169] [2023-11-06 22:30:56,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:56,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:56,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:56,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:56,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:56,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 349 [2023-11-06 22:30:56,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:56,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 349 [2023-11-06 22:30:56,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:01,667 INFO L124 PetriNetUnfolderBase]: 38465/56010 cut-off events. [2023-11-06 22:31:01,668 INFO L125 PetriNetUnfolderBase]: For 921/921 co-relation queries the response was YES. [2023-11-06 22:31:01,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109679 conditions, 56010 events. 38465/56010 cut-off events. For 921/921 co-relation queries the response was YES. Maximal size of possible extension queue 1542. Compared 412185 event pairs, 30327 based on Foata normal form. 0/52236 useless extension candidates. Maximal degree in co-relation 102902. Up to 52299 conditions per place. [2023-11-06 22:31:01,982 INFO L140 encePairwiseOnDemand]: 345/349 looper letters, 60 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-11-06 22:31:01,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 88 transitions, 331 flow [2023-11-06 22:31:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:31:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:31:01,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-11-06 22:31:01,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281757402101241 [2023-11-06 22:31:01,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-11-06 22:31:01,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-11-06 22:31:01,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:01,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-11-06 22:31:01,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:01,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:01,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:01,995 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 187 flow. Second operand 3 states and 553 transitions. [2023-11-06 22:31:01,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 88 transitions, 331 flow [2023-11-06 22:31:02,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:31:02,222 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 197 flow [2023-11-06 22:31:02,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2023-11-06 22:31:02,224 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2023-11-06 22:31:02,224 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 197 flow [2023-11-06 22:31:02,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:02,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:02,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:31:02,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:31:02,226 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:31:02,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:02,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1590392554, now seen corresponding path program 1 times [2023-11-06 22:31:02,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:02,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588501650] [2023-11-06 22:31:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:02,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:02,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:02,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588501650] [2023-11-06 22:31:02,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588501650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:02,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322147389] [2023-11-06 22:31:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:02,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:02,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:02,345 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:02,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:31:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:02,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:31:02,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:02,446 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:31:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:02,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:02,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322147389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:02,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:02,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:31:02,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373826056] [2023-11-06 22:31:02,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:02,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:31:02,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:02,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:31:02,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:31:02,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 349 [2023-11-06 22:31:02,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 197 flow. Second operand has 7 states, 7 states have (on average 161.71428571428572) internal successors, (1132), 7 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:02,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:02,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 349 [2023-11-06 22:31:02,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:07,638 INFO L124 PetriNetUnfolderBase]: 36497/52527 cut-off events. [2023-11-06 22:31:07,638 INFO L125 PetriNetUnfolderBase]: For 2501/2501 co-relation queries the response was YES. [2023-11-06 22:31:07,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103971 conditions, 52527 events. 36497/52527 cut-off events. For 2501/2501 co-relation queries the response was YES. Maximal size of possible extension queue 1509. Compared 375436 event pairs, 13594 based on Foata normal form. 8/50049 useless extension candidates. Maximal degree in co-relation 15808. Up to 42635 conditions per place. [2023-11-06 22:31:07,933 INFO L140 encePairwiseOnDemand]: 345/349 looper letters, 125 selfloop transitions, 6 changer transitions 0/157 dead transitions. [2023-11-06 22:31:07,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 157 transitions, 617 flow [2023-11-06 22:31:07,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:31:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:31:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1095 transitions. [2023-11-06 22:31:07,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229226361031518 [2023-11-06 22:31:07,938 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1095 transitions. [2023-11-06 22:31:07,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1095 transitions. [2023-11-06 22:31:07,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:07,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1095 transitions. [2023-11-06 22:31:07,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.5) internal successors, (1095), 6 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:07,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:07,949 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:07,949 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 197 flow. Second operand 6 states and 1095 transitions. [2023-11-06 22:31:07,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 157 transitions, 617 flow [2023-11-06 22:31:07,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 157 transitions, 615 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:31:07,953 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 211 flow [2023-11-06 22:31:07,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2023-11-06 22:31:07,954 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2023-11-06 22:31:07,954 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 211 flow [2023-11-06 22:31:07,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 161.71428571428572) internal successors, (1132), 7 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:07,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:07,956 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:31:07,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:31:08,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_329599f6-f87e-4426-8ccf-da4c72c14e33/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:31:08,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:31:08,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:08,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1070545471, now seen corresponding path program 1 times [2023-11-06 22:31:08,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:08,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277728315] [2023-11-06 22:31:08,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:08,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:31:08,184 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:31:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:31:08,212 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:31:08,213 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:31:08,213 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-06 22:31:08,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-06 22:31:08,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-06 22:31:08,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-06 22:31:08,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-06 22:31:08,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-06 22:31:08,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-06 22:31:08,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:31:08,215 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-06 22:31:08,215 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:31:08,216 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 22:31:08,252 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:31:08,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 240 transitions, 520 flow [2023-11-06 22:31:08,373 INFO L124 PetriNetUnfolderBase]: 120/803 cut-off events. [2023-11-06 22:31:08,373 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:31:08,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 803 events. 120/803 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3703 event pairs, 6 based on Foata normal form. 0/620 useless extension candidates. Maximal degree in co-relation 550. Up to 32 conditions per place. [2023-11-06 22:31:08,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 240 transitions, 520 flow [2023-11-06 22:31:08,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 240 transitions, 520 flow [2023-11-06 22:31:08,388 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:31:08,388 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 240 transitions, 520 flow [2023-11-06 22:31:08,389 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 240 transitions, 520 flow [2023-11-06 22:31:08,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 240 transitions, 520 flow [2023-11-06 22:31:08,496 INFO L124 PetriNetUnfolderBase]: 120/803 cut-off events. [2023-11-06 22:31:08,496 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:31:08,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 803 events. 120/803 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3703 event pairs, 6 based on Foata normal form. 0/620 useless extension candidates. Maximal degree in co-relation 550. Up to 32 conditions per place. [2023-11-06 22:31:08,532 INFO L119 LiptonReduction]: Number of co-enabled transitions 32984 [2023-11-06 22:31:12,111 INFO L134 LiptonReduction]: Checked pairs total: 111506 [2023-11-06 22:31:12,111 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-11-06 22:31:12,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:31:12,113 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;@40873475, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:31:12,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 22:31:12,115 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:31:12,115 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:31:12,115 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:31:12,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:12,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:31:12,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 22:31:12,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:12,116 INFO L85 PathProgramCache]: Analyzing trace with hash 53993, now seen corresponding path program 1 times [2023-11-06 22:31:12,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:12,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497897653] [2023-11-06 22:31:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:12,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:12,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:12,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497897653] [2023-11-06 22:31:12,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497897653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:12,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:12,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:31:12,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599218847] [2023-11-06 22:31:12,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:12,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:31:12,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:12,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:31:12,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:31:12,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 401 [2023-11-06 22:31:12,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 134 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:12,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:12,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 401 [2023-11-06 22:31:12,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand