./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e54e3c041005c4525c3228cc12d27a93b528db4b6a57c9d2a4209bc47f8ee6e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:04:52,878 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:04:52,957 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:04:52,963 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:04:52,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:04:52,990 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:04:52,990 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:04:52,991 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:04:52,992 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:04:52,992 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:04:52,993 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:04:52,994 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:04:52,995 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:04:52,995 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:04:52,996 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:04:52,997 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:04:52,997 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:04:52,998 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:04:52,998 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:04:52,999 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:04:53,000 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:04:53,000 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:04:53,001 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:04:53,002 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:04:53,002 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:04:53,003 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:04:53,004 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:04:53,004 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:04:53,005 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:04:53,005 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:04:53,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:04:53,006 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:04:53,007 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:04:53,007 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:04:53,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:04:53,008 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:04:53,009 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:04:53,009 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:04:53,010 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:04:53,010 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_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e54e3c041005c4525c3228cc12d27a93b528db4b6a57c9d2a4209bc47f8ee6e [2023-11-21 22:04:53,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:04:53,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:04:53,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:04:53,364 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:04:53,365 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:04:53,366 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2023-11-21 22:04:56,417 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:04:56,713 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:04:56,713 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2023-11-21 22:04:56,730 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/data/c512f5fe4/3de5bf33d908455f8f7cc1831f231dc6/FLAGe9a166c94 [2023-11-21 22:04:56,746 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/data/c512f5fe4/3de5bf33d908455f8f7cc1831f231dc6 [2023-11-21 22:04:56,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:04:56,752 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:04:56,753 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:04:56,753 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:04:56,759 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:04:56,760 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:04:56" (1/1) ... [2023-11-21 22:04:56,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78737a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:56, skipping insertion in model container [2023-11-21 22:04:56,761 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:04:56" (1/1) ... [2023-11-21 22:04:56,814 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:04:57,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:04:57,217 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:04:57,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:04:57,338 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:04:57,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57 WrapperNode [2023-11-21 22:04:57,338 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:04:57,340 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:04:57,340 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:04:57,340 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:04:57,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57" (1/1) ... [2023-11-21 22:04:57,381 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57" (1/1) ... [2023-11-21 22:04:57,410 INFO L138 Inliner]: procedures = 171, calls = 27, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 94 [2023-11-21 22:04:57,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:04:57,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:04:57,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:04:57,412 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:04:57,421 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57" (1/1) ... [2023-11-21 22:04:57,422 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57" (1/1) ... [2023-11-21 22:04:57,428 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57" (1/1) ... [2023-11-21 22:04:57,428 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57" (1/1) ... [2023-11-21 22:04:57,435 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57" (1/1) ... [2023-11-21 22:04:57,439 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57" (1/1) ... [2023-11-21 22:04:57,441 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57" (1/1) ... [2023-11-21 22:04:57,442 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57" (1/1) ... [2023-11-21 22:04:57,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:04:57,447 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:04:57,447 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:04:57,447 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:04:57,448 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57" (1/1) ... [2023-11-21 22:04:57,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:04:57,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:04:57,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:04:57,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb3f9629-2e37-4c91-b8ad-4d156586dcfd/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:04:57,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:04:57,517 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-21 22:04:57,517 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-21 22:04:57,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:04:57,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:04:57,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:04:57,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:04:57,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:04:57,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:04:57,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:04:57,519 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:04:57,641 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:04:57,644 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:04:57,860 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:04:58,117 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:04:58,122 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 22:04:58,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:04:58 BoogieIcfgContainer [2023-11-21 22:04:58,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:04:58,131 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:04:58,131 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:04:58,134 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:04:58,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:04:56" (1/3) ... [2023-11-21 22:04:58,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1ede53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:04:58, skipping insertion in model container [2023-11-21 22:04:58,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:04:57" (2/3) ... [2023-11-21 22:04:58,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1ede53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:04:58, skipping insertion in model container [2023-11-21 22:04:58,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:04:58" (3/3) ... [2023-11-21 22:04:58,141 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2023-11-21 22:04:58,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:04:58,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-21 22:04:58,161 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:04:58,205 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:04:58,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 30 transitions, 64 flow [2023-11-21 22:04:58,272 INFO L124 PetriNetUnfolderBase]: 3/37 cut-off events. [2023-11-21 22:04:58,273 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:04:58,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 37 events. 3/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 76 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-21 22:04:58,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 30 transitions, 64 flow [2023-11-21 22:04:58,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 30 transitions, 64 flow [2023-11-21 22:04:58,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:04:58,301 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;@17f11c7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:04:58,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-21 22:04:58,306 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:04:58,306 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 22:04:58,306 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:04:58,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:04:58,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:04:58,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-21 22:04:58,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:04:58,313 INFO L85 PathProgramCache]: Analyzing trace with hash 333241, now seen corresponding path program 1 times [2023-11-21 22:04:58,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:04:58,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174490764] [2023-11-21 22:04:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:04:58,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:04:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:04:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:04:58,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:04:58,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174490764] [2023-11-21 22:04:58,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174490764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:04:58,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:04:58,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:04:58,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699293062] [2023-11-21 22:04:58,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:04:58,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:04:58,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:04:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:04:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:04:58,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2023-11-21 22:04:58,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-11-21 22:04:58,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:04:58,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2023-11-21 22:04:58,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:04:58,832 INFO L124 PetriNetUnfolderBase]: 31/96 cut-off events. [2023-11-21 22:04:58,832 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:04:58,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 96 events. 31/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 273 event pairs, 27 based on Foata normal form. 8/102 useless extension candidates. Maximal degree in co-relation 158. Up to 74 conditions per place. [2023-11-21 22:04:58,837 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 14 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-21 22:04:58,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 23 transitions, 80 flow [2023-11-21 22:04:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:04:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:04:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2023-11-21 22:04:58,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-11-21 22:04:58,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 46 transitions. [2023-11-21 22:04:58,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 46 transitions. [2023-11-21 22:04:58,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:04:58,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 46 transitions. [2023-11-21 22:04:58,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-11-21 22:04:58,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2023-11-21 22:04:58,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2023-11-21 22:04:58,862 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 64 flow. Second operand 3 states and 46 transitions. [2023-11-21 22:04:58,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 23 transitions, 80 flow [2023-11-21 22:04:58,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 23 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 22:04:58,867 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 52 flow [2023-11-21 22:04:58,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-11-21 22:04:58,874 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-21 22:04:58,874 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 52 flow [2023-11-21 22:04:58,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-11-21 22:04:58,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:04:58,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:04:58,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:04:58,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-21 22:04:58,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:04:58,876 INFO L85 PathProgramCache]: Analyzing trace with hash 333242, now seen corresponding path program 1 times [2023-11-21 22:04:58,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:04:58,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300067554] [2023-11-21 22:04:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:04:58,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:04:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:04:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:04:59,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:04:59,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300067554] [2023-11-21 22:04:59,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300067554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:04:59,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:04:59,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:04:59,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880298944] [2023-11-21 22:04:59,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:04:59,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:04:59,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:04:59,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:04:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:04:59,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2023-11-21 22:04:59,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2023-11-21 22:04:59,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:04:59,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2023-11-21 22:04:59,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:04:59,164 INFO L124 PetriNetUnfolderBase]: 21/72 cut-off events. [2023-11-21 22:04:59,164 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 22:04:59,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 72 events. 21/72 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 183 event pairs, 18 based on Foata normal form. 11/81 useless extension candidates. Maximal degree in co-relation 125. Up to 53 conditions per place. [2023-11-21 22:04:59,167 INFO L140 encePairwiseOnDemand]: 28/30 looper letters, 13 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-21 22:04:59,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 22 transitions, 78 flow [2023-11-21 22:04:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:04:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:04:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2023-11-21 22:04:59,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-21 22:04:59,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2023-11-21 22:04:59,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2023-11-21 22:04:59,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:04:59,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2023-11-21 22:04:59,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2023-11-21 22:04:59,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2023-11-21 22:04:59,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2023-11-21 22:04:59,175 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 52 flow. Second operand 3 states and 45 transitions. [2023-11-21 22:04:59,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 22 transitions, 78 flow [2023-11-21 22:04:59,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 22 transitions, 77 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:04:59,179 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 51 flow [2023-11-21 22:04:59,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-21 22:04:59,181 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-21 22:04:59,181 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 51 flow [2023-11-21 22:04:59,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2023-11-21 22:04:59,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:04:59,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:04:59,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:04:59,183 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-21 22:04:59,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:04:59,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1473399162, now seen corresponding path program 1 times [2023-11-21 22:04:59,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:04:59,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530380229] [2023-11-21 22:04:59,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:04:59,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:04:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:04:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:04:59,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:04:59,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530380229] [2023-11-21 22:04:59,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530380229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:04:59,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:04:59,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:04:59,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625388031] [2023-11-21 22:04:59,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:04:59,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:04:59,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:04:59,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:04:59,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:04:59,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2023-11-21 22:04:59,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 51 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2023-11-21 22:04:59,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:04:59,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2023-11-21 22:04:59,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:04:59,576 INFO L124 PetriNetUnfolderBase]: 31/91 cut-off events. [2023-11-21 22:04:59,576 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:04:59,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 91 events. 31/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 244 event pairs, 27 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 165. Up to 74 conditions per place. [2023-11-21 22:04:59,580 INFO L140 encePairwiseOnDemand]: 28/30 looper letters, 14 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-21 22:04:59,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 21 transitions, 79 flow [2023-11-21 22:04:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:04:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:04:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2023-11-21 22:04:59,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-11-21 22:04:59,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 43 transitions. [2023-11-21 22:04:59,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 43 transitions. [2023-11-21 22:04:59,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:04:59,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 43 transitions. [2023-11-21 22:04:59,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-11-21 22:04:59,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2023-11-21 22:04:59,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2023-11-21 22:04:59,589 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 51 flow. Second operand 3 states and 43 transitions. [2023-11-21 22:04:59,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 21 transitions, 79 flow [2023-11-21 22:04:59,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 21 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:04:59,591 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 50 flow [2023-11-21 22:04:59,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-11-21 22:04:59,593 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-21 22:04:59,593 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 50 flow [2023-11-21 22:04:59,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2023-11-21 22:04:59,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:04:59,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:04:59,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:04:59,594 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-21 22:04:59,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:04:59,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1473399161, now seen corresponding path program 1 times [2023-11-21 22:04:59,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:04:59,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34929698] [2023-11-21 22:04:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:04:59,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:04:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:04:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:04:59,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:04:59,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34929698] [2023-11-21 22:04:59,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34929698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:04:59,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:04:59,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:04:59,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329789274] [2023-11-21 22:04:59,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:04:59,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:04:59,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:04:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:04:59,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:04:59,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2023-11-21 22:04:59,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2023-11-21 22:04:59,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:04:59,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2023-11-21 22:04:59,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:00,147 INFO L124 PetriNetUnfolderBase]: 39/127 cut-off events. [2023-11-21 22:05:00,147 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 22:05:00,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 127 events. 39/127 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 324 event pairs, 6 based on Foata normal form. 3/126 useless extension candidates. Maximal degree in co-relation 225. Up to 40 conditions per place. [2023-11-21 22:05:00,150 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 22 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-11-21 22:05:00,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 128 flow [2023-11-21 22:05:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:05:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:05:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2023-11-21 22:05:00,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2023-11-21 22:05:00,154 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2023-11-21 22:05:00,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2023-11-21 22:05:00,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:00,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2023-11-21 22:05:00,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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) [2023-11-21 22:05:00,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2023-11-21 22:05:00,157 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2023-11-21 22:05:00,157 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 50 flow. Second operand 5 states and 79 transitions. [2023-11-21 22:05:00,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 128 flow [2023-11-21 22:05:00,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:00,161 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 76 flow [2023-11-21 22:05:00,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-11-21 22:05:00,163 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-21 22:05:00,163 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 76 flow [2023-11-21 22:05:00,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2023-11-21 22:05:00,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:00,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-21 22:05:00,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:05:00,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-21 22:05:00,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:00,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1569100898, now seen corresponding path program 1 times [2023-11-21 22:05:00,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:00,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109041164] [2023-11-21 22:05:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:00,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:05:00,187 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 22:05:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:05:00,224 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 22:05:00,224 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 22:05:00,226 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-21 22:05:00,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-11-21 22:05:00,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-21 22:05:00,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2023-11-21 22:05:00,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-21 22:05:00,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-11-21 22:05:00,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-21 22:05:00,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2023-11-21 22:05:00,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2023-11-21 22:05:00,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-21 22:05:00,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:05:00,232 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-21 22:05:00,234 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 22:05:00,234 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-21 22:05:00,270 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:05:00,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 50 transitions, 110 flow [2023-11-21 22:05:00,288 INFO L124 PetriNetUnfolderBase]: 6/65 cut-off events. [2023-11-21 22:05:00,288 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:05:00,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 65 events. 6/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 181 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 46. Up to 3 conditions per place. [2023-11-21 22:05:00,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 50 transitions, 110 flow [2023-11-21 22:05:00,297 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 50 transitions, 110 flow [2023-11-21 22:05:00,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:05:00,306 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;@17f11c7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:05:00,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-21 22:05:00,308 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:05:00,308 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 22:05:00,310 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:05:00,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:00,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:05:00,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-21 22:05:00,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:00,311 INFO L85 PathProgramCache]: Analyzing trace with hash 382891, now seen corresponding path program 1 times [2023-11-21 22:05:00,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:00,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408670535] [2023-11-21 22:05:00,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:00,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:00,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:00,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408670535] [2023-11-21 22:05:00,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408670535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:00,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:00,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:00,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627329416] [2023-11-21 22:05:00,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:00,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:00,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:00,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:00,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2023-11-21 22:05:00,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-11-21 22:05:00,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:00,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2023-11-21 22:05:00,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:00,628 INFO L124 PetriNetUnfolderBase]: 741/1447 cut-off events. [2023-11-21 22:05:00,629 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-21 22:05:00,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2667 conditions, 1447 events. 741/1447 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7815 event pairs, 657 based on Foata normal form. 164/1581 useless extension candidates. Maximal degree in co-relation 1705. Up to 1184 conditions per place. [2023-11-21 22:05:00,643 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 25 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-21 22:05:00,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 142 flow [2023-11-21 22:05:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2023-11-21 22:05:00,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2023-11-21 22:05:00,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 77 transitions. [2023-11-21 22:05:00,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 77 transitions. [2023-11-21 22:05:00,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:00,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 77 transitions. [2023-11-21 22:05:00,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2023-11-21 22:05:00,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 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) [2023-11-21 22:05:00,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 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) [2023-11-21 22:05:00,651 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 110 flow. Second operand 3 states and 77 transitions. [2023-11-21 22:05:00,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 142 flow [2023-11-21 22:05:00,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 142 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 22:05:00,654 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 92 flow [2023-11-21 22:05:00,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-21 22:05:00,659 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-11-21 22:05:00,659 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 92 flow [2023-11-21 22:05:00,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-11-21 22:05:00,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:00,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:05:00,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:05:00,660 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-21 22:05:00,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:00,660 INFO L85 PathProgramCache]: Analyzing trace with hash 382892, now seen corresponding path program 1 times [2023-11-21 22:05:00,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:00,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264755494] [2023-11-21 22:05:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:00,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:00,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:00,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264755494] [2023-11-21 22:05:00,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264755494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:00,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:00,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:00,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645439568] [2023-11-21 22:05:00,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:00,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:00,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:00,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:00,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:00,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2023-11-21 22:05:00,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2023-11-21 22:05:00,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:00,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2023-11-21 22:05:00,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:00,904 INFO L124 PetriNetUnfolderBase]: 531/1062 cut-off events. [2023-11-21 22:05:00,904 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-21 22:05:00,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 1062 events. 531/1062 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5473 event pairs, 468 based on Foata normal form. 111/1150 useless extension candidates. Maximal degree in co-relation 1955. Up to 863 conditions per place. [2023-11-21 22:05:00,914 INFO L140 encePairwiseOnDemand]: 48/50 looper letters, 24 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-21 22:05:00,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 140 flow [2023-11-21 22:05:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2023-11-21 22:05:00,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2023-11-21 22:05:00,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 74 transitions. [2023-11-21 22:05:00,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 74 transitions. [2023-11-21 22:05:00,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:00,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 74 transitions. [2023-11-21 22:05:00,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2023-11-21 22:05:00,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 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) [2023-11-21 22:05:00,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 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) [2023-11-21 22:05:00,918 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 92 flow. Second operand 3 states and 74 transitions. [2023-11-21 22:05:00,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 140 flow [2023-11-21 22:05:00,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:00,920 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 91 flow [2023-11-21 22:05:00,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-11-21 22:05:00,921 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-11-21 22:05:00,921 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 91 flow [2023-11-21 22:05:00,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2023-11-21 22:05:00,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:00,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:00,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:05:00,922 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-21 22:05:00,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:00,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1431869624, now seen corresponding path program 1 times [2023-11-21 22:05:00,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:00,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222335740] [2023-11-21 22:05:00,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:00,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:01,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:01,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222335740] [2023-11-21 22:05:01,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222335740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:01,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:01,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:05:01,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942987364] [2023-11-21 22:05:01,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:01,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:05:01,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:01,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:05:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:05:01,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2023-11-21 22:05:01,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-11-21 22:05:01,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:01,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2023-11-21 22:05:01,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:01,252 INFO L124 PetriNetUnfolderBase]: 741/1418 cut-off events. [2023-11-21 22:05:01,252 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-21 22:05:01,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2641 conditions, 1418 events. 741/1418 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7484 event pairs, 657 based on Foata normal form. 0/1409 useless extension candidates. Maximal degree in co-relation 2632. Up to 1184 conditions per place. [2023-11-21 22:05:01,264 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 25 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-21 22:05:01,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 139 flow [2023-11-21 22:05:01,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-21 22:05:01,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-21 22:05:01,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-21 22:05:01,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-21 22:05:01,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:01,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-21 22:05:01,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2023-11-21 22:05:01,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 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) [2023-11-21 22:05:01,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 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) [2023-11-21 22:05:01,270 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 91 flow. Second operand 3 states and 70 transitions. [2023-11-21 22:05:01,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 139 flow [2023-11-21 22:05:01,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 37 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:01,272 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 88 flow [2023-11-21 22:05:01,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-11-21 22:05:01,275 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-11-21 22:05:01,275 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 88 flow [2023-11-21 22:05:01,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-11-21 22:05:01,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:01,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:01,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:05:01,276 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-21 22:05:01,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:01,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1431869625, now seen corresponding path program 1 times [2023-11-21 22:05:01,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:01,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203771530] [2023-11-21 22:05:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:01,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:01,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:01,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203771530] [2023-11-21 22:05:01,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203771530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:01,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:01,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:05:01,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950167647] [2023-11-21 22:05:01,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:01,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:05:01,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:01,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:05:01,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:05:01,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2023-11-21 22:05:01,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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) [2023-11-21 22:05:01,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:01,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2023-11-21 22:05:01,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:02,017 INFO L124 PetriNetUnfolderBase]: 1008/1930 cut-off events. [2023-11-21 22:05:02,017 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-11-21 22:05:02,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3634 conditions, 1930 events. 1008/1930 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 10614 event pairs, 168 based on Foata normal form. 33/1926 useless extension candidates. Maximal degree in co-relation 3624. Up to 688 conditions per place. [2023-11-21 22:05:02,033 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 55 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2023-11-21 22:05:02,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 71 transitions, 286 flow [2023-11-21 22:05:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:05:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:05:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2023-11-21 22:05:02,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.568 [2023-11-21 22:05:02,035 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 142 transitions. [2023-11-21 22:05:02,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 142 transitions. [2023-11-21 22:05:02,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:02,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 142 transitions. [2023-11-21 22:05:02,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 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) [2023-11-21 22:05:02,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 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) [2023-11-21 22:05:02,039 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 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) [2023-11-21 22:05:02,039 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 88 flow. Second operand 5 states and 142 transitions. [2023-11-21 22:05:02,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 71 transitions, 286 flow [2023-11-21 22:05:02,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 71 transitions, 285 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:02,044 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 114 flow [2023-11-21 22:05:02,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-11-21 22:05:02,045 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-11-21 22:05:02,045 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 114 flow [2023-11-21 22:05:02,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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) [2023-11-21 22:05:02,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:02,046 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:02,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:05:02,046 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-21 22:05:02,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:02,047 INFO L85 PathProgramCache]: Analyzing trace with hash 493842528, now seen corresponding path program 1 times [2023-11-21 22:05:02,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:02,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068591767] [2023-11-21 22:05:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:02,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:05:02,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:02,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068591767] [2023-11-21 22:05:02,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068591767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:02,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:02,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:05:02,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558005174] [2023-11-21 22:05:02,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:02,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:05:02,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:02,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:05:02,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:05:02,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2023-11-21 22:05:02,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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) [2023-11-21 22:05:02,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:02,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2023-11-21 22:05:02,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:02,858 INFO L124 PetriNetUnfolderBase]: 1765/3344 cut-off events. [2023-11-21 22:05:02,858 INFO L125 PetriNetUnfolderBase]: For 716/758 co-relation queries the response was YES. [2023-11-21 22:05:02,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6810 conditions, 3344 events. 1765/3344 cut-off events. For 716/758 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 19525 event pairs, 346 based on Foata normal form. 54/3340 useless extension candidates. Maximal degree in co-relation 6797. Up to 1152 conditions per place. [2023-11-21 22:05:02,886 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 59 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-11-21 22:05:02,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 350 flow [2023-11-21 22:05:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:05:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:05:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2023-11-21 22:05:02,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2023-11-21 22:05:02,888 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 140 transitions. [2023-11-21 22:05:02,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 140 transitions. [2023-11-21 22:05:02,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:02,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 140 transitions. [2023-11-21 22:05:02,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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) [2023-11-21 22:05:02,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 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) [2023-11-21 22:05:02,890 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 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) [2023-11-21 22:05:02,890 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 114 flow. Second operand 5 states and 140 transitions. [2023-11-21 22:05:02,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 350 flow [2023-11-21 22:05:02,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 349 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:02,894 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 140 flow [2023-11-21 22:05:02,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2023-11-21 22:05:02,895 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-11-21 22:05:02,895 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 140 flow [2023-11-21 22:05:02,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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) [2023-11-21 22:05:02,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:02,896 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-21 22:05:02,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:05:02,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-21 22:05:02,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1870916114, now seen corresponding path program 1 times [2023-11-21 22:05:02,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:02,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424247134] [2023-11-21 22:05:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:02,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:05:02,910 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 22:05:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:05:02,922 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 22:05:02,922 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 22:05:02,923 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-11-21 22:05:02,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-11-21 22:05:02,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-11-21 22:05:02,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2023-11-21 22:05:02,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-11-21 22:05:02,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-11-21 22:05:02,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2023-11-21 22:05:02,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-11-21 22:05:02,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2023-11-21 22:05:02,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2023-11-21 22:05:02,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2023-11-21 22:05:02,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2023-11-21 22:05:02,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2023-11-21 22:05:02,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:05:02,925 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-21 22:05:02,926 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 22:05:02,926 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-21 22:05:02,959 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:05:02,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 70 transitions, 158 flow [2023-11-21 22:05:02,972 INFO L124 PetriNetUnfolderBase]: 9/93 cut-off events. [2023-11-21 22:05:02,972 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-21 22:05:02,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 9/93 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 292 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2023-11-21 22:05:02,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 70 transitions, 158 flow [2023-11-21 22:05:02,974 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 70 transitions, 158 flow [2023-11-21 22:05:02,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:05:02,976 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;@17f11c7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:05:02,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-21 22:05:02,978 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:05:02,978 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 22:05:02,978 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:05:02,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:02,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:05:02,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 22:05:02,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:02,979 INFO L85 PathProgramCache]: Analyzing trace with hash 452401, now seen corresponding path program 1 times [2023-11-21 22:05:02,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:02,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246598847] [2023-11-21 22:05:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:02,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:03,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:03,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246598847] [2023-11-21 22:05:03,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246598847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:03,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:03,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:03,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046460427] [2023-11-21 22:05:03,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:03,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:03,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:03,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 70 [2023-11-21 22:05:03,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2023-11-21 22:05:03,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:03,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 70 [2023-11-21 22:05:03,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:05,374 INFO L124 PetriNetUnfolderBase]: 11841/19015 cut-off events. [2023-11-21 22:05:05,374 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2023-11-21 22:05:05,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35736 conditions, 19015 events. 11841/19015 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 130950 event pairs, 10557 based on Foata normal form. 2500/21201 useless extension candidates. Maximal degree in co-relation 4546. Up to 16284 conditions per place. [2023-11-21 22:05:05,537 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 36 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-11-21 22:05:05,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 206 flow [2023-11-21 22:05:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2023-11-21 22:05:05,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2023-11-21 22:05:05,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2023-11-21 22:05:05,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2023-11-21 22:05:05,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:05,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2023-11-21 22:05:05,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-11-21 22:05:05,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 22:05:05,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 22:05:05,541 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 158 flow. Second operand 3 states and 108 transitions. [2023-11-21 22:05:05,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 206 flow [2023-11-21 22:05:05,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 204 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-21 22:05:05,547 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 132 flow [2023-11-21 22:05:05,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-21 22:05:05,549 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-11-21 22:05:05,549 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 132 flow [2023-11-21 22:05:05,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2023-11-21 22:05:05,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:05,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:05:05,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:05:05,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 22:05:05,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:05,550 INFO L85 PathProgramCache]: Analyzing trace with hash 452402, now seen corresponding path program 1 times [2023-11-21 22:05:05,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:05,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180357136] [2023-11-21 22:05:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:05,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:05,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:05,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180357136] [2023-11-21 22:05:05,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180357136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:05,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:05,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:05,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352406628] [2023-11-21 22:05:05,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:05,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:05,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:05,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:05,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:05,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-21 22:05:05,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2023-11-21 22:05:05,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:05,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-21 22:05:05,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:07,406 INFO L124 PetriNetUnfolderBase]: 8631/14022 cut-off events. [2023-11-21 22:05:07,407 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2023-11-21 22:05:07,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26324 conditions, 14022 events. 8631/14022 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 93998 event pairs, 7668 based on Foata normal form. 1111/14879 useless extension candidates. Maximal degree in co-relation 26315. Up to 11963 conditions per place. [2023-11-21 22:05:07,513 INFO L140 encePairwiseOnDemand]: 68/70 looper letters, 35 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-11-21 22:05:07,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 202 flow [2023-11-21 22:05:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-21 22:05:07,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2023-11-21 22:05:07,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-21 22:05:07,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-21 22:05:07,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:07,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-21 22:05:07,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2023-11-21 22:05:07,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 22:05:07,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 22:05:07,518 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 132 flow. Second operand 3 states and 103 transitions. [2023-11-21 22:05:07,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 202 flow [2023-11-21 22:05:07,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 56 transitions, 201 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:07,520 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 131 flow [2023-11-21 22:05:07,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-11-21 22:05:07,521 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-11-21 22:05:07,521 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 131 flow [2023-11-21 22:05:07,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2023-11-21 22:05:07,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:07,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:07,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 22:05:07,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 22:05:07,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:07,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1204025803, now seen corresponding path program 1 times [2023-11-21 22:05:07,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:07,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344237560] [2023-11-21 22:05:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:07,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:07,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:07,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344237560] [2023-11-21 22:05:07,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344237560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:07,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:07,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:05:07,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519201329] [2023-11-21 22:05:07,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:07,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:05:07,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:07,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:05:07,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:05:07,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 70 [2023-11-21 22:05:07,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2023-11-21 22:05:07,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:07,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 70 [2023-11-21 22:05:07,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:09,903 INFO L124 PetriNetUnfolderBase]: 11841/18750 cut-off events. [2023-11-21 22:05:09,904 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2023-11-21 22:05:09,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35374 conditions, 18750 events. 11841/18750 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 126262 event pairs, 10557 based on Foata normal form. 0/18657 useless extension candidates. Maximal degree in co-relation 35364. Up to 16284 conditions per place. [2023-11-21 22:05:10,089 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 36 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-21 22:05:10,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 53 transitions, 199 flow [2023-11-21 22:05:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2023-11-21 22:05:10,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-11-21 22:05:10,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 97 transitions. [2023-11-21 22:05:10,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 97 transitions. [2023-11-21 22:05:10,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:10,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 97 transitions. [2023-11-21 22:05:10,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2023-11-21 22:05:10,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 22:05:10,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 22:05:10,095 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 131 flow. Second operand 3 states and 97 transitions. [2023-11-21 22:05:10,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 53 transitions, 199 flow [2023-11-21 22:05:10,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 53 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:10,100 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 126 flow [2023-11-21 22:05:10,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-11-21 22:05:10,101 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -7 predicate places. [2023-11-21 22:05:10,102 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 126 flow [2023-11-21 22:05:10,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2023-11-21 22:05:10,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:10,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:10,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 22:05:10,103 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 22:05:10,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:10,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1204025804, now seen corresponding path program 1 times [2023-11-21 22:05:10,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:10,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893265996] [2023-11-21 22:05:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:10,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:10,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893265996] [2023-11-21 22:05:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893265996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:10,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:10,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:05:10,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213250135] [2023-11-21 22:05:10,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:10,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:05:10,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:05:10,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:05:10,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-21 22:05:10,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2023-11-21 22:05:10,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:10,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-21 22:05:10,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:13,444 INFO L124 PetriNetUnfolderBase]: 16398/25753 cut-off events. [2023-11-21 22:05:13,445 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2023-11-21 22:05:13,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49118 conditions, 25753 events. 16398/25753 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 175991 event pairs, 5643 based on Foata normal form. 333/25719 useless extension candidates. Maximal degree in co-relation 49107. Up to 9568 conditions per place. [2023-11-21 22:05:13,679 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 88 selfloop transitions, 5 changer transitions 0/109 dead transitions. [2023-11-21 22:05:13,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 109 transitions, 444 flow [2023-11-21 22:05:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:05:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:05:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 205 transitions. [2023-11-21 22:05:13,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2023-11-21 22:05:13,683 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 205 transitions. [2023-11-21 22:05:13,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 205 transitions. [2023-11-21 22:05:13,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:13,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 205 transitions. [2023-11-21 22:05:13,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 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) [2023-11-21 22:05:13,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 22:05:13,689 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 22:05:13,689 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 126 flow. Second operand 5 states and 205 transitions. [2023-11-21 22:05:13,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 109 transitions, 444 flow [2023-11-21 22:05:13,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 109 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:13,694 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 152 flow [2023-11-21 22:05:13,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2023-11-21 22:05:13,696 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-11-21 22:05:13,697 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 152 flow [2023-11-21 22:05:13,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2023-11-21 22:05:13,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:13,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:13,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 22:05:13,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 22:05:13,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:13,699 INFO L85 PathProgramCache]: Analyzing trace with hash 980953062, now seen corresponding path program 1 times [2023-11-21 22:05:13,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:13,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876304087] [2023-11-21 22:05:13,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:13,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:05:13,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:13,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876304087] [2023-11-21 22:05:13,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876304087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:13,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:13,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:05:13,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17589433] [2023-11-21 22:05:13,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:13,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:05:13,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:13,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:05:13,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:05:14,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-21 22:05:14,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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) [2023-11-21 22:05:14,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:14,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-21 22:05:14,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:18,740 INFO L124 PetriNetUnfolderBase]: 29467/46037 cut-off events. [2023-11-21 22:05:18,740 INFO L125 PetriNetUnfolderBase]: For 8456/9002 co-relation queries the response was YES. [2023-11-21 22:05:18,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93658 conditions, 46037 events. 29467/46037 cut-off events. For 8456/9002 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 332825 event pairs, 7462 based on Foata normal form. 594/45977 useless extension candidates. Maximal degree in co-relation 93644. Up to 17136 conditions per place. [2023-11-21 22:05:19,063 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 92 selfloop transitions, 5 changer transitions 0/113 dead transitions. [2023-11-21 22:05:19,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 113 transitions, 508 flow [2023-11-21 22:05:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:05:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:05:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 203 transitions. [2023-11-21 22:05:19,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2023-11-21 22:05:19,065 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 203 transitions. [2023-11-21 22:05:19,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 203 transitions. [2023-11-21 22:05:19,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:19,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 203 transitions. [2023-11-21 22:05:19,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 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) [2023-11-21 22:05:19,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 22:05:19,068 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 22:05:19,068 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 152 flow. Second operand 5 states and 203 transitions. [2023-11-21 22:05:19,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 113 transitions, 508 flow [2023-11-21 22:05:19,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 113 transitions, 507 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:19,076 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 178 flow [2023-11-21 22:05:19,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-11-21 22:05:19,077 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-11-21 22:05:19,078 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 178 flow [2023-11-21 22:05:19,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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) [2023-11-21 22:05:19,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:19,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:19,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 22:05:19,079 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 22:05:19,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:19,079 INFO L85 PathProgramCache]: Analyzing trace with hash 763198879, now seen corresponding path program 1 times [2023-11-21 22:05:19,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:19,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150220623] [2023-11-21 22:05:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:19,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:19,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:19,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150220623] [2023-11-21 22:05:19,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150220623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:19,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:19,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:05:19,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770470121] [2023-11-21 22:05:19,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:19,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:19,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:19,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-21 22:05:19,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-11-21 22:05:19,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:19,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-21 22:05:19,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:23,354 INFO L124 PetriNetUnfolderBase]: 27919/42377 cut-off events. [2023-11-21 22:05:23,354 INFO L125 PetriNetUnfolderBase]: For 11619/11922 co-relation queries the response was YES. [2023-11-21 22:05:23,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93571 conditions, 42377 events. 27919/42377 cut-off events. For 11619/11922 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 296962 event pairs, 9652 based on Foata normal form. 0/42314 useless extension candidates. Maximal degree in co-relation 93554. Up to 24225 conditions per place. [2023-11-21 22:05:23,657 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 63 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-11-21 22:05:23,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 384 flow [2023-11-21 22:05:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-11-21 22:05:23,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2023-11-21 22:05:23,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-11-21 22:05:23,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-11-21 22:05:23,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:23,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-11-21 22:05:23,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2023-11-21 22:05:23,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 22:05:23,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 22:05:23,663 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 178 flow. Second operand 3 states and 128 transitions. [2023-11-21 22:05:23,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 384 flow [2023-11-21 22:05:23,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 80 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:23,773 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 177 flow [2023-11-21 22:05:23,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2023-11-21 22:05:23,774 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2023-11-21 22:05:23,774 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 177 flow [2023-11-21 22:05:23,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-11-21 22:05:23,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:23,775 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:23,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-21 22:05:23,775 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 22:05:23,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:23,776 INFO L85 PathProgramCache]: Analyzing trace with hash 776298950, now seen corresponding path program 1 times [2023-11-21 22:05:23,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:23,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102157710] [2023-11-21 22:05:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:23,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 22:05:24,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:24,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102157710] [2023-11-21 22:05:24,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102157710] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:24,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:24,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:05:24,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698689545] [2023-11-21 22:05:24,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:24,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:05:24,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:24,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:05:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:05:24,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-21 22:05:24,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2023-11-21 22:05:24,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:24,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-21 22:05:24,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:28,827 INFO L124 PetriNetUnfolderBase]: 30289/47366 cut-off events. [2023-11-21 22:05:28,827 INFO L125 PetriNetUnfolderBase]: For 19890/20805 co-relation queries the response was YES. [2023-11-21 22:05:28,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104980 conditions, 47366 events. 30289/47366 cut-off events. For 19890/20805 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 345723 event pairs, 9616 based on Foata normal form. 0/46451 useless extension candidates. Maximal degree in co-relation 104963. Up to 26208 conditions per place. [2023-11-21 22:05:29,365 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 62 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-11-21 22:05:29,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 407 flow [2023-11-21 22:05:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:05:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:05:29,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 148 transitions. [2023-11-21 22:05:29,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2023-11-21 22:05:29,367 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 148 transitions. [2023-11-21 22:05:29,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 148 transitions. [2023-11-21 22:05:29,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:29,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 148 transitions. [2023-11-21 22:05:29,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2023-11-21 22:05:29,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 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) [2023-11-21 22:05:29,370 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 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) [2023-11-21 22:05:29,370 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 177 flow. Second operand 4 states and 148 transitions. [2023-11-21 22:05:29,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 407 flow [2023-11-21 22:05:29,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 81 transitions, 401 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:05:29,393 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 203 flow [2023-11-21 22:05:29,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=203, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-11-21 22:05:29,394 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-11-21 22:05:29,394 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 203 flow [2023-11-21 22:05:29,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2023-11-21 22:05:29,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:29,395 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-21 22:05:29,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-21 22:05:29,395 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 22:05:29,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:29,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1704701535, now seen corresponding path program 1 times [2023-11-21 22:05:29,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:29,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527920558] [2023-11-21 22:05:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:29,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:05:29,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 22:05:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:05:29,423 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 22:05:29,423 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 22:05:29,424 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2023-11-21 22:05:29,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-11-21 22:05:29,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-11-21 22:05:29,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (12 of 16 remaining) [2023-11-21 22:05:29,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-11-21 22:05:29,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-11-21 22:05:29,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2023-11-21 22:05:29,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-11-21 22:05:29,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-11-21 22:05:29,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 16 remaining) [2023-11-21 22:05:29,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-11-21 22:05:29,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-11-21 22:05:29,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2023-11-21 22:05:29,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-11-21 22:05:29,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-11-21 22:05:29,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2023-11-21 22:05:29,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-21 22:05:29,427 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:29,428 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 22:05:29,428 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-21 22:05:29,466 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:05:29,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 90 transitions, 208 flow [2023-11-21 22:05:29,484 INFO L124 PetriNetUnfolderBase]: 12/121 cut-off events. [2023-11-21 22:05:29,484 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-21 22:05:29,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 121 events. 12/121 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 393 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 105. Up to 5 conditions per place. [2023-11-21 22:05:29,485 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 90 transitions, 208 flow [2023-11-21 22:05:29,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 90 transitions, 208 flow [2023-11-21 22:05:29,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:05:29,490 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;@17f11c7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:05:29,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-11-21 22:05:29,491 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:05:29,491 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 22:05:29,492 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:05:29,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:29,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:05:29,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2023-11-21 22:05:29,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash 541771, now seen corresponding path program 1 times [2023-11-21 22:05:29,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:29,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342321117] [2023-11-21 22:05:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:29,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:29,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:29,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342321117] [2023-11-21 22:05:29,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342321117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:29,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:29,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:29,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966648105] [2023-11-21 22:05:29,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:29,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:29,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:29,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:29,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:29,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 90 [2023-11-21 22:05:29,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 90 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2023-11-21 22:05:29,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:29,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 90 [2023-11-21 22:05:29,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand